[go: up one dir, main page]
 
 
Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
7.4
4.2
Journals
Molecules
Special Issues
Inorganic Chemistry in Europe
molecules-logo
Submit to Special Issue Submit Abstract to Special Issue Review for Molecules Propose a Special Issue

Journal Menu

► Journal Menu

Journal Browser

► Journal Browser
share announcement

Inorganic Chemistry in Europe

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Inorganic Chemistry".

Deadline for manuscript submissions: 31 December 2024 | Viewed by 2457

Special Issue Editor

Dr. Vassilis Tangoulis

E-Mail Website
Guest Editor
Department of Chemistry, University of Patras, Patra, Greece
Interests: hybrid carbon based nano-materials; encapsulation/decoration of functionalized multi-wall nanotubes with Single Molecule Magnets (SMMs) and the study of their magnetic behaviour; application of hybrid materials in the area of spintronics or medicine (MRI agents)
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Inorganic Chemistry is one of the most popular and fastest growing, interdisciplinary research fields of Chemistry, which is served by an appreciable number of faculty members and Research Directors in Universities and Research Institutes. The research interests of the Inorganic Chemistry community span the areas of synthetic inorganic chemistry (coordination clusters, polymers and MOFs), structural chemistry, materials science, spectroscopic, physicochemical and theoretical characterization, molecule-based magnetism, luminescence, catalysis, conductivity, bioinorganic and medicinal inorganic chemistry, and photochemistry, to name a few.

The present Special Issue is a compilation of novel, cutting-edge achievements in the most interesting areas of modern inorganic chemistry, which are as follows:

  • Single-molecule magnets, MOFs;
  • Spin crossover;
  • Multifunctional magnetic materials;
  • Magnetocaloric effect;
  • Crystal structure;
  • Structure−property relationships;
  • Magnetic relaxation;
  • Magnetic materials;
  • Prussian blue analogues and photomagnetism;
  • Inorganic heterostructures ;
  • Luminescence thermometers;
  • Inorganic dyes;
  • Bio-inorganic compounds;
  • Inorganic materials in catalysis;
  • Inorganic materials for supercapacitors.

This Special Issue will contain the most recent results obtained in research laboratories of prominent inorganic chemists from Europe working in the described broad area of inorganic chemistry. As such, this Special Issue will be interesting to other chemists working in this field and beyond—all those who further advance science and human knowledge.

Dr. Vassilis Tangoulis
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Molecules is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Benefits of Publishing in a Special Issue

  • Ease of navigation: Grouping papers by topic helps scholars navigate broad scope journals more efficiently.
  • Greater discoverability: Special Issues support the reach and impact of scientific research. Articles in Special Issues are more discoverable and cited more frequently.
  • Expansion of research network: Special Issues facilitate connections among authors, fostering scientific collaborations.
  • External promotion: Articles in Special Issues are often promoted through the journal's social media, increasing their visibility.
  • e-Book format: Special Issues with more than 10 articles can be published as dedicated e-books, ensuring wide and rapid dissemination.

Further information on MDPI's Special Issue polices can be found here.

Published Papers (3 papers)

Download All Papers
Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

16 pages, 4159 KiB  
Article
Effect of Substituted Pyridine Co-Ligands and (Diacetoxyiodo)benzene Oxidants on the Fe(III)-OIPh-Mediated Triphenylmethane Hydroxylation Reaction
by Patrik Török and József Kaizer
Molecules 2024, 29(16), 3842; https://doi.org/10.3390/molecules29163842 - 13 Aug 2024
Viewed by 545
Abstract
Iodosilarene derivatives (PhIO, PhI(OAc)2) constitute an important class of oxygen atom transfer reagents in organic synthesis and are often used together with iron-based catalysts. Since the factors controlling the ability of iron centers to catalyze alkane hydroxylation are not yet fully [...] Read more.
Iodosilarene derivatives (PhIO, PhI(OAc)2) constitute an important class of oxygen atom transfer reagents in organic synthesis and are often used together with iron-based catalysts. Since the factors controlling the ability of iron centers to catalyze alkane hydroxylation are not yet fully understood, the aim of this report is to develop bioinspired non-heme iron catalysts in combination with PhI(OAc)2, which are suitable for performing C-H activation. Overall, this study provides insight into the iron-based ([FeII(PBI)3(CF3SO3)2] (1), where PBI = 2-(2-pyridyl)benzimidazole) catalytic and stoichiometric hydroxylation of triphenylmethane using PhI(OAc)2, highlighting the importance of reaction conditions including the effect of the co-ligands (para-substituted pyridines) and oxidants (para-substituted iodosylbenzene diacetates) on product yields and reaction kinetics. A number of mechanistic studies have been carried out on the mechanism of triphenylmethane hydroxylation, including C-H activation, supporting the reactive intermediate, and investigating the effects of equatorial co-ligands and coordinated oxidants. Strong evidence for the electrophilic nature of the reaction was observed based on competitive experiments, which included a Hammett correlation between the relative reaction rate (logkrel) and the σp (4R-Py and 4R’-PhI(OAc)2) parameters in both stoichiometric (ρ = +0.87 and +0.92) and catalytic (ρ = +0.97 and +0.77) reactions. The presence of [(PBI)2(4R-Py)FeIIIOIPh-4R’]3+ intermediates, as well as the effect of co-ligands and coordinated oxidants, was supported by their spectral (UV–visible) and redox properties. It has been proven that the electrophilic nature of iron(III)-iodozilarene complexes is crucial in the oxidation reaction of triphenylmethane. The hydroxylation rates showed a linear correlation with the FeIII/FeII redox potentials (in the range of −350 mV and −524 mV), which suggests that the Lewis acidity and redox properties of the metal centers greatly influence the reactivity of the reactive intermediates. Full article
(This article belongs to the Special Issue Inorganic Chemistry in Europe)
►▼ Show Figures

Figure 1

Figure 1
<p>[Fe<sup>II</sup>(PBI)<sub>3</sub>](OTf)<sub>2</sub>-catalyzed hydroxylation of triphenylmethane with PhI(OAc)<sub>2</sub> in the absence and presence of <span class="html-italic">para</span>-substituted pyridines in acetonitrile at 323 K: [Fe<sup>II</sup>(OTf)<sub>2</sub>]<sub>0</sub> = 1 × 10<sup>−3</sup> M, [<b>1</b>]<sub>0</sub> = 1 × 10<sup>−3</sup> M, [PhI(OAc)<sub>2</sub>]<sub>0</sub> = 1 × 10<sup>−1</sup> M, and [Ph<sub>3</sub>CH]<sub>0</sub> = 3 × 10<sup>−1</sup> M, [pyridine]<sub>0</sub> = 1 × 10<sup>−2</sup> M.</p> Full article ">Figure 2
<p>[Fe<sup>II</sup>(PBI)<sub>3</sub>](OTf)<sub>2</sub>-catalyzed hydroxylation of triphenylmethane with PhI(OAc)<sub>2</sub> in the presence of <span class="html-italic">para</span>-substituted pyridines in acetonitrile at 323 K: (<b>a</b>) the calculated conversion (=TON) values for <span class="html-italic">para</span>-substituted pyridines. (<b>b</b>) Hammett plot of log<span class="html-italic">k</span><sub>rel</sub> against the <span class="html-italic">σ</span><sub>p</sub> of <span class="html-italic">para</span>-substituted pyridines. [<b>1</b>]<sub>0</sub> = 1 × 10<sup>−3</sup> M, [PhI(OAc)<sub>2</sub>]<sub>0</sub> = 1 × 10<sup>−1</sup> M, [Ph<sub>3</sub>CH]<sub>0</sub> = 3 × 10<sup>−1</sup> M, [pyridine]<sub>0</sub> = 1 × 10<sup>−2</sup> M.</p> Full article ">Figure 3
<p>(<b>a</b>) Formation of [(PBI)<sub>2</sub>(MeCN)Fe<sup>III</sup>(4R-PhIO)]<sup>3+</sup> intermediates in the in situ reaction of <b>1</b> with 4R’-Ph(IOAc)<sub>2</sub> in acetonitrile at 293 K monitored at 760 nm. (<b>b</b>) Hammett plot of log<span class="html-italic">k</span><sub>rel</sub> against the <span class="html-italic">σ</span><sub>p</sub> of <span class="html-italic">para</span>-substituted 4R’-Ph(IOAc)<sub>2</sub> oxidants. [<b>1</b>]<sub>0</sub> = 1 × 10<sup>−3</sup> M, [4R’-PhI(OAc)<sub>2</sub>]<sub>0</sub> = 1 × 10<sup>−2</sup> M.</p> Full article ">Figure 4
<p>[Fe<sup>II</sup>(PBI)<sub>3</sub>](OTf)<sub>2</sub>-catalyzed hydroxylation of triphenylmethane with 4R’-PhI(OAc)<sub>2</sub> in acetonitrile at 323 K: (<b>a</b>) the calculated conversion (=TON) values for 4R’-PhI(OAc)<sub>2</sub>. (<b>b</b>) Hammett plot of log<span class="html-italic">k</span><sub>rel</sub> against the <span class="html-italic">σ</span><sub>p</sub> of 4R-PhI(OAc)<sub>2</sub>. [<b>1</b>]<sub>0</sub> = 1 × 10<sup>−3</sup> M, [4R’-PhI(OAc)<sub>2</sub>]<sub>0</sub> = 1 × 10<sup>−1</sup> M, and [Ph<sub>3</sub>CH]<sub>0</sub> = 3 × 10<sup>−1</sup> M.</p> Full article ">Figure 5
<p>Redox properties of the [(PBI)<sub>2</sub>Fe<sup>III</sup>(OIPh)(4R-Py)] intermediates generated in situ by the reaction of <b>1</b> with Ph(IOAc)<sub>2</sub> in acetonitrile at 293 K. (<b>a</b>) Cyclic voltammograms of [(PBI)<sub>2</sub>Fe<sup>III</sup>(OIPh)(4R-Py)] intermediates. (<b>b</b>) <span class="html-italic">E</span><sub>1/2</sub> vs. σ values for [(PBI)<sub>2</sub>[(4R-Py)Fe<sup>III</sup>(OIPh)]<sup>3+</sup> intermediates. Conditions: [[Fe<sup>II</sup>(PBI)<sub>3</sub>](OTf)<sub>2</sub>]<sub>0</sub> = 1 × 10<sup>−3</sup> M, [PhI(OAc)<sub>2</sub>]<sub>0</sub>= 2 × 10<sup>−3</sup> M, [4R-Py]<sub>0</sub> = 1 × 10<sup>−2</sup> M, in (0.1 M TBAClO<sub>4</sub>) CH<sub>3</sub>CN (10 cm<sup>3</sup>), scan rate: 1500 mV/s.</p> Full article ">Figure 6
<p>Decrease in absorbance of [(PBI)<sub>2</sub>[(4Ac-Py)Fe<sup>III</sup>(OIPh)]<sup>3+</sup> intermediate in the stoichiometric oxidation of triphenylmethane at 293 K in acetonitrile. Inset: time course of the decay monitored at 745 nm. [<b>1</b>]<sub>0</sub> = 1 × 10<sup>−3</sup> M, [PhI(OAc)<sub>2</sub>]<sub>0</sub> = 1.2 × 10<sup>−3</sup> M, [triphenylmethane]<sub>0</sub> = 1 × 10<sup>−1</sup> M, [4Ac-Py]<sub>0</sub> = 1 × 10<sup>−2</sup> M.</p> Full article ">Figure 7
<p>Stoichiometric hydroxylation of triphenylmethane with [(PBI)<sub>2</sub>(4R-Py)Fe<sup>III</sup>(OIPh)]<sup>3+</sup> intermediates generated in situ by the reaction of <b>1</b> with Ph(IOAc)<sub>2</sub> and 4R-Py derivatives in acetonitrile at 293 K: (<b>a</b>) monitoring the decrease in absorbance of [(PBI)<sub>2</sub>(4R-Py)Fe<sup>III</sup>(OIPh)]<sup>3+</sup> intermediates by UV–Vis spectroscopy at 723–760 nm over time at 293 K. (<b>b</b>) Hammett plot of log<span class="html-italic">k</span><sub>rel</sub> against the <span class="html-italic">σ</span><sub>p</sub> of 4R-Py. [<b>1</b>]<sub>0</sub> = 1 × 10<sup>−3</sup> M, [PhI(OAc)<sub>2</sub>]<sub>0</sub> = 1.2 × 10<sup>−3</sup> M, [Ph<sub>3</sub>CH]<sub>0</sub> = 1 × 10<sup>−1</sup> M, [4R-Py]<sub>0</sub> = 1 × 10<sup>−2</sup> M.</p> Full article ">Figure 8
<p>Stoichiometric hydroxylation of triphenylmethane with [(PBI)<sub>2</sub>(4R-Py)Fe<sup>III</sup>(OIPh)]<sup>3+</sup> intermediates generated in situ by the reaction of [Fe<sup>II</sup>(PBI)<sub>3</sub>](OTf)<sub>2</sub> with Ph(IOAc)<sub>2</sub> and 4R-Py derivatives in acetonitrile at 293 K: (<b>a</b>) log(<span class="html-italic">k</span><sub>rel</sub>) against <span class="html-italic">E</span><sub>1/2</sub> for [(PBI)<sub>2</sub>(4R-Py)Fe<sup>III</sup>(OIPh)]<sup>3+</sup> intermediates. (<b>b</b>) log(<span class="html-italic">k</span><sub>rel</sub>) against ν for [(PBI)<sub>2</sub>(4R-Py)Fe<sup>III</sup>(OIPh)]<sup>3+</sup> intermediates. [<b>1</b>]<sub>0</sub> = 1 × 10<sup>−3</sup> M, [PhI(OAc)<sub>2</sub>]<sub>0</sub> = 1.2 × 10<sup>−3</sup> M, [Ph<sub>3</sub>CH]<sub>0</sub> = 1 × 10<sup>−1</sup> M, [4R-Py]<sub>0</sub> = 1 × 10<sup>−2</sup> M.</p> Full article ">Figure 9
<p>UV–Vis spectral properties of [(PBI)<sub>2</sub>[(X)Fe<sup>III</sup>(OIPh)]<sup>3+</sup> (X = CH<sub>3</sub>CN, Py, PyO) intermediates at 293 K in acetonitrile. [<b>1</b>]<sub>0</sub> = 1 × 10<sup>−3</sup> M, [PhI(OAc)<sub>2</sub>]<sub>0</sub> = 1.2 × 10<sup>−3</sup> M, [triphenylmethane]<sub>0</sub> = 1 × 10<sup>−1</sup> M, [X]<sub>0</sub> = 1 × 10<sup>−2</sup> M.</p> Full article ">Figure 10
<p>Stoichiometric hydroxylation of triphenylmethane with [(PBI)<sub>2</sub>(MeCN)Fe<sup>III</sup>(OIPh-4R)]<sup>3+</sup> (R = -Cl, -H, -Me, -OMe) intermediates generated in situ by the reaction of <b>1</b> with 4R-Ph(IOAc)<sub>2</sub> (R = -Cl, -H, -Me, -OMe) oxidants in acetonitrile at 293 K: (<b>a</b>) Monitoring the decrease in absorbance of [(PBI)<sub>2</sub>(CH<sub>3</sub>CN)Fe<sup>III</sup>(OIPh-4R)]<sup>3+</sup> intermediates by UV–Vis spectroscopy at 760 nm over time at 293 K. (<b>b</b>) Hammett plot of log<span class="html-italic">k</span><sub>rel</sub> against the <span class="html-italic">σ</span><sub>p</sub> of [(PBI)<sub>2</sub>(CH<sub>3</sub>CN)Fe<sup>III</sup>(OIPh-4R)]<sup>3+</sup>intermediates. [[Fe<sup>II</sup>(PBI)<sub>3</sub>](OTf)<sub>2</sub>]<sub>0</sub> = 1 × 10<sup>−3</sup> M, [4R-PhI(OAc)<sub>2</sub>]<sub>0</sub> = 1.2 × 10<sup>−3</sup> M, [Ph<sub>3</sub>CH]<sub>0</sub> = 1 × 10<sup>−1</sup> M.</p> Full article ">Scheme 1
<p>[Fe<sup>II</sup>(PBI)<sub>3</sub>](OTf)<sub>2</sub> (<b>1</b>) catalyzed oxidation of triphenylmethane mediated by [(PBI)<sub>2</sub>(4R-Py)Fe<sup>III</sup>(4R’-PhIO)]<sup>3</sup>+ intermediates in the presence of 4R’-PhI(OAc)<sub>2</sub> terminal oxidants and 4R-Py co-ligands.</p> Full article ">Scheme 2
<p>Proposed mechanistic pathways for the iron(III)–iodosylarene ([(PBI)<sub>2</sub>[(4R-Py)Fe<sup>III</sup>(OIPh-4R)]<sup>3+</sup>) mediated oxidation of triphenylmethane.</p> Full article ">
12 pages, 2990 KiB  
Article
Solid State and Solution Structures of Lanthanide Nitrate Complexes of Tris-(1-napthylphosphine oxide)
by Simon J. Coles, Laura J. McCormick McPherson, Andrew W. G. Platt and Kuldip Singh
Molecules 2024, 29(11), 2580; https://doi.org/10.3390/molecules29112580 - 30 May 2024
Viewed by 487
Abstract
Coordination complexes of lanthanide metals with tris-1-naphthylphosphine oxide (Nap3PO, L) have not been previously reported in the literature. We describe here the formation of lanthanide(III) nitrate complexes Ln(NO3)3L4 (Ln = Eu to Lu) and the structures [...] Read more.
Coordination complexes of lanthanide metals with tris-1-naphthylphosphine oxide (Nap3PO, L) have not been previously reported in the literature. We describe here the formation of lanthanide(III) nitrate complexes Ln(NO3)3L4 (Ln = Eu to Lu) and the structures of [Ln(NO3)3L2]·2L (Ln = Eu, Dy, Ho, Er) and L. The core structure of the complexes is an eight-coordinate [Ln(NO3)3L2] with the third and fourth ligands H-bonded via their oxygen atoms to one of the naphthyl rings. The structures are compared with those of the analogous complexes of triphenylphosphine oxide and show that the Ln-O(P) bond in the Nap3PO complexes is slightly longer than expected on the basis of differences in coordination numbers. The reaction solutions, investigated by 31P and 13C NMR spectroscopy in CD3CN, show that coordination of L occurs across the lanthanide series, even though complexes can only be isolated from Eu onwards. Analysis of the 31P NMR paramagnetic shifts shows that there is a break in the solution structures with a difference between the lighter lanthanides (La–Eu) and heavier metals (Tb–Lu) which implies a minor difference in structures. The isolated complexes are very poorly soluble, but in CDCl3, NMR measurements show dissociation into [Ln(NO3)3L2] and 2L occurs. Full article
(This article belongs to the Special Issue Inorganic Chemistry in Europe)
►▼ Show Figures

Figure 1

Figure 1
<p>The <sup>13</sup>C NMR spectra of Nap<sub>3</sub>PO and La(NO<sub>3</sub>)<sub>3</sub>/Nap<sub>3</sub>PO in CD<sub>3</sub>CN.</p> Full article ">Figure 2
<p>Lanthanide-induced <sup>31</sup>P NMR shift plots for complexes of Nap<sub>3</sub>PO in CD<sub>3</sub>CN at 30 °C.</p> Full article ">Figure 3
<p>The structure of Nap<sub>3</sub>PO (<b>upper</b>), thermal ellipsoids drawn at 50%, one of the edge-to-face intermolecular interactions (<b>lower left</b>) in Nap<sub>3</sub>PO and the hydrogen bonding of the PO group (<b>lower right</b>). The interactions are indicated by dashed lines other weak intermolecular C⋯·H interactions are illustrated in <a href="#app1-molecules-29-02580" class="html-app">Figure S5 in the Supplementary Information</a>.</p> Full article ">Figure 4
<p>The structure of [Dy(NO<sub>3</sub>)<sub>3</sub>(Nap<sub>3</sub>PO)<sub>2</sub>]·2Nap<sub>3</sub>PO. Thermal ellipsoids drawn at 50%, hydrogen atoms omitted for clarity.</p> Full article ">Figure 5
<p>Ln-O bond distance as a function of atomic number in [Ln(NO<sub>3</sub>)<sub>3</sub>(Nap<sub>3</sub>PO)<sub>2</sub>]·2Nap<sub>3</sub>PO.</p> Full article ">Figure 6
<p>Average bond lengths (Å) and angles (°) in Nap<sub>3</sub>PO (red), Ph<sub>3</sub>PO (blue) and their lanthanide nitrate complexes.</p> Full article ">Figure 7
<p>The interaction between H4 and C5 (dashed line) in [Dy(NO<sub>3</sub>)<sub>3</sub>(Nap<sub>3</sub>PO)<sub>2</sub>]·2Nap<sub>3</sub>PO.</p> Full article ">
18 pages, 6557 KiB  
Article
Stannylenes and Germylenes Stabilized by Tetradentate Bis(amidine) Ligands with a Rigid Naphthalene Backbone
by Alejandra Acuña, Sonia Mallet-Ladeira, Jean-Marc Sotiropoulos, Eddy Maerten, Alan R. Cabrera, Antoine Baceiredo, Tsuyoshi Kato, René S. Rojas and David Madec
Molecules 2024, 29(2), 325; https://doi.org/10.3390/molecules29020325 - 9 Jan 2024
Viewed by 1095
Abstract
An unusual series of germylenes and stannylenes stabilized by new tetradentate bis(amidine) ligands RNC(R′)N-linker-NC(R′)NR with a rigid naphthalene backbone has been prepared by protonolysis reaction of Lappert’s metallylenes [M(HMDS)2] (M = Ge or Sn). Germylenes and stannylenes were fully characterized by [...] Read more.
An unusual series of germylenes and stannylenes stabilized by new tetradentate bis(amidine) ligands RNC(R′)N-linker-NC(R′)NR with a rigid naphthalene backbone has been prepared by protonolysis reaction of Lappert’s metallylenes [M(HMDS)2] (M = Ge or Sn). Germylenes and stannylenes were fully characterized by NMR spectroscopy and X-ray diffraction analysis. DFT calculations have been performed to clarify the structural and electronic properties associated with tetradentate bis(amidine) ligands. Stannylene L1Sn shows reactivity through oxidation, oxidative addition, and transmetalation reactions, affording the corresponding gallium and aluminum derivatives. Full article
(This article belongs to the Special Issue Inorganic Chemistry in Europe)
►▼ Show Figures

Figure 1

Figure 1
<p>Examples of germylenes and stannylenes with bis(amidine) ligands [<a href="#B6-molecules-29-00325" class="html-bibr">6</a>,<a href="#B7-molecules-29-00325" class="html-bibr">7</a>,<a href="#B8-molecules-29-00325" class="html-bibr">8</a>,<a href="#B9-molecules-29-00325" class="html-bibr">9</a>,<a href="#B10-molecules-29-00325" class="html-bibr">10</a>,<a href="#B11-molecules-29-00325" class="html-bibr">11</a>].</p> Full article ">Figure 2
<p>Molecular structure of <b>L<sub>3</sub>H<sub>2</sub></b>. Thermal ellipsoids are represented with a 30% probability. Hydrogen atoms (except H1 and H4A) have been omitted for clarity. Selected bond distances [Å] and bond angles [deg]: N(1)-C(11) 1.421(5); N(2)-C(11) 1.272(5); N(3)-C(23) 1.286(5); N(4)-C(23) 1.373(5); N1-(H1)<sup>…</sup>N(3) 1.95(5); N(1)-C(11)-N(2) 122.5(3); N(3)-C(23)-N(4) 126.1(3).</p> Full article ">Figure 3
<p>Molecular structure of <b>L<sub>1</sub>Sn</b>. Thermal ellipsoids are represented with a 30% probability. Hydrogen atoms have been omitted for clarity. Selected bond distances [Å] and bond angles [deg]: Sn(1)-N(1) 2.2435(17); Sn(1)-N(2) 2.3327(17); Sn(1)-N(3) 2.2232(17); Sn(1)-N(4) 2.3181(16); N(1)-C(11) 1.326(3); N(2)-C(11) 1.328(3); N(3)-C(21) 1.328(3); N(4)-C(21) 1.329(3); N(3)-Sn(1)-N(1) 72.57(6); N(3)-Sn(1)-N(4) 57.74(6); N(1)-Sn(1)-N(4) 107.35(6); N(3)-Sn(1)-N(2) 112.07(6); N(1)-Sn(1)-N(2) 57.38(6); N(4)-Sn(1)-N(2) 95.29(6); N(1)-C(11)-N(2) 111.85(17); N(3)-C(21)-N(4) 111.37(17).</p> Full article ">Figure 4
<p>LUMO +2 (up) and HOMO −1 (down) for <b>L<sub>1</sub>Sn</b>.</p> Full article ">Figure 5
<p>Molecular structure of (<b>L<sub>2</sub>Sn</b>)<b><sub>2</sub></b>. Thermal ellipsoids are represented with a 30% probability. Hydrogen atoms and solvent molecules have been omitted for clarity. Selected bond distances [Å] and bond angles [deg]: Sn(1)-N(1) 2.243(2); Sn(1)-N(2<sup>i</sup>) 2.327(2); Sn(1)-N(3) 2.144(3); C(11)-N(1) 1.378(4); C(11)-N(2) 1.309(4); N(1)-Sn(1)-N(3) 78.80(9); N(3)-Sn(1)-N(2<sup>i</sup>) 97.73(9); N(1)-Sn(1)-N(2<sup>i</sup>) 95.21(9); C(11)-N(1)-Sn(1) 112.43(18); N(1)-C(11)-N(2) 114.2(3).</p> Full article ">Figure 6
<p>Molecular structure of (<b>L<sub>1</sub>Ge</b>)<b><sub>2</sub></b>. Thermal ellipsoids are represented with a 30% probability. Hydrogen atoms and solvent molecules have been omitted for clarity. Selected bond distances [Å] and bond angles [deg]: Ge(1)-N(1<sup>i</sup>) 2.0961(11); Ge(1)-N(2) 2.0048(10); Ge(1)-N(3) 1.9332(10); C(9)-N(1) 1.3074(16); C(9)-N(2) 1.3740(16); N(3)-Ge(1)-N(2) 87.48(4); N(3)-Ge(1)-N(1<sup>i</sup>) 95.69(4); N(2)-Ge(1)-N(1<sup>i</sup>) 96.79(4); N(1)-C(9)-N(2) 116.31(11); C(9)-N(2)-Ge(1) 112.38(8).</p> Full article ">Figure 7
<p>Molecular structure of <b>L<sub>2</sub>Ge</b>. Thermal ellipsoids are represented with a 30% probability. Hydrogen atoms have been omitted for clarity. Selected bond distances [Å] and bond angles [deg]: Ge(1)-N(1) 1.969(3); Ge(1)-N(2) 2.073(3); Ge(1)-N(3) 1.912(3); C(11)-N(2) 1.308(5); C(11)-N(1) 1.374(5); C(24)-N(4) 1.275(5); C(24)-N(3) 1.417(5); N(1)-Ge(1)-N(2) 64.89(13); N(1)-Ge(1)-N(3) 90.95(13); N(2)-Ge(1)-N(3) 102.00(13); N(1)-C(11)-N(2) 108.0(3); N(3)-C(24)-N(4) 124.0(3).</p> Full article ">Figure 8
<p>Molecular structure of <b>1a</b>. Thermal ellipsoids are represented with a 30% probability. Hydrogens and solvent molecules have been omitted for clarity. Selected bond distances [Å] and bond angles [deg]: Sn(1)-N(1) 2.2236(10); Sn(1)-N(2) 2.1644(11); Sn(1)-N(3) 2.1423(10); Sn(1)-N(4) 2.2742(10); Sn(1)-O(1) 2.0079(9); Sn(1)-O(1<sup>i</sup>) 1.9996(8); Sn(1)-Sn(1<sup>i</sup>) 2.97787(19); C(11)-N(1) 1.3285(16); C(11)-N(2) 1.3415(16); C(21)-N(4) 1.3113(17); C(21)-N(3) 1.3439(17); O(1)-Sn(1)-O(1<sup>i</sup>) 84.01(4); Sn(1)-O(1)-Sn(1<sup>i</sup>) 95.98(4); N(1)-C(11)-N(2) 110.50(11); N(3)-C(21)-N(4) 112.95(11).</p> Full article ">Figure 9
<p>Molecular structure of <b>1b</b>. Thermal ellipsoids are represented with a 30% probability. Hydrogen atoms and solvent molecules have been omitted for clarity. The asymmetric unit contains two independent but very similar molecules; data for only one molecule are discussed. Selected bond distances [Å] and bond angles [deg]: Sn(1)-N(1) 2.130(4); Sn(1)-N(2) 2.374(3); Sn(1)-N(3) 2.240(3); Sn(1)-N(4) 2.198(4); Sn(1)-S(1) 2.4172(14); Sn(1)-S(1<sup>i</sup>) 2.4585(13); C(11)-N(1) 1.345(6); C(11)-N(2) 1.315(5); C(21)-N(3) 1.332(5); C(21)-N(4) 1.328(5); Sn(1)-S(1)-Sn(1<sup>i</sup>) 87.92(4); S(1)-Sn(1)-S(1<sup>i</sup>) 92.08(4); N(1)-C(11)-N(2) 112.8(4); N(3)-C(21)-N(4) 110.9(4).</p> Full article ">Figure 10
<p>Molecular structure of <b>2a</b>. Thermal ellipsoids are represented with a 30% probability. Hydrogen atoms have been omitted for clarity. Selected bond distances [Å] and bond angles [deg]: Sn(1)-N(1) 2.132(3); Sn(1)-N(2) 2.411(3); Sn(1)-N(3) 2.230(3); Sn(1)-N(4) 2.180(3); Sn(1)-S(1) 2.4297(15); Sn(1)-S(2) 2.4483(16); C(11)-N(1) 1.361(4); C(11)-N(2) 1.301(4); C(21)-N(3) 1.334(4); C(21)-N(4) 1.337(4); N(1)-Sn(1)-N(4) 132.96(11); N(1)-Sn(1)-N(3) 78.01(11); N(3)-Sn(1)-N(4) 59.72(10); N(1)-Sn(1)-N(2) 58.27(11); N(2)-Sn(1)-N(4) 97.20(12); N(2)-Sn(1)-N(3) 86.71(11); N(1)-Sn(1)-S(1) 111.48(9); N(4)-Sn(1)-S(1) 102.83(8); N(3)-Sn(1)-S(1) 158.14(7); N(2)-Sn(1)-S(1) 82.44(9); N(1)-Sn(1)-S(2) 105.90(9); N(4)-Sn(1)-S(2) 97.26(9); N(3)-Sn(1)-S(2) 94.06(9); N(2)-Sn(1)-S(2) 163.67(8); S(1)-Sn(1)-S(2) 101.67(7); N(2)-C(11)-N(1) 113.5(3); N(3)-C(21)-N(4) 110.6(3).</p> Full article ">Figure 11
<p>Molecular structure of <b>3b</b>. Thermal ellipsoids are represented with a 30% probability. Hydrogens have been omitted for clarity. Selected bond distances [Å] and bond angles [deg]: Ga(1)-N(1) 1.984(4); Ga(1)-N(2) 2.017(4); Ga(1)-N(3) 1.981(4); Ga(1)-N(4) 2.051(4); Ga(1)-Cl(1) 2.1828(14); N(1)-Ga(1)-N(3) 85.32(15); C(11)-N(1) 1.320(5); C(11)-N(2) 1.345(6); C(21)-N(3) 1.327(6); C(21)-N(4) 1.342(6); N(2)-Ga(1)-N(3) 139.06(16); N(1)-Ga(1)-N(2) 65.43(16); N(3)-Ga(1)-N(4) 65.69(15); N(1)-Ga(1)-N(4) 130.88(15); N(2)-Ga(1)-N(4) 112.06(16); N(3)-Ga(1)-Cl(1) 110.32(12); N(1)-Ga(1)-Cl(1) 115.30(11); N(2)-Ga(1)-Cl(1) 107.98(12); N(4)-Ga(1)-Cl(1) 111.79(12); N(1)-C(11)-N(2) 108.5(4); N(3)-C(21)-N(4) 110.1(4).</p> Full article ">Scheme 1
<p>Synthesis of ligand <b>L<sub>3</sub>H<sub>2</sub></b>.</p> Full article ">Scheme 2
<p>Synthesis of stannylene <b>L<sub>1–3</sub>Sn</b>.</p> Full article ">Scheme 3
<p>Synthetic routes to obtain <b>L<sub>2-3</sub>Sn</b> from deprotonated bis(amidine) ligands.</p> Full article ">Scheme 4
<p>Synthetic routes to obtain <b>L<sub>2-3</sub>Sn</b> by protonolysis.</p> Full article ">Scheme 5
<p>Synthesis of germylenes <b>L<sub>1–3</sub>Ge</b>.</p> Full article ">Scheme 6
<p>Synthesis of <b>1a</b>.</p> Full article ">Scheme 7
<p>Synthetic route to obtain <b>1b</b>.</p> Full article ">Scheme 8
<p>Synthesis of <b>2a</b>.</p> Full article ">Scheme 9
<p>Synthesis of <b>2b</b>.</p> Full article ">Scheme 10
<p>Synthesis of <b>L<sub>1</sub>Ge</b> by transmetalation reaction.</p> Full article ">Scheme 11
<p>Synthesis of <b>3a</b> and <b>3b</b> via transmetalation reactions.</p> Full article ">
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-3
Back to TopTop