Journal ArticleDOI
Structural variation in copper(I) complexes with pyridylmethylamide ligands: structural analysis with a new four-coordinate geometry index, tau4.
TLDR
A new geometric parameter for four-coordinate compounds, tau(4), is proposed as an improved, simple metric for quantitatively evaluating the geometry of four- coordinate complexes and compounds.Abstract:
Four Cu(I) complexes were synthesized with a family of pyridylmethylamide ligands, HLR [HLR = N-(2-pyridylmethyl)acetamide, R = null; 2,2-dimethyl-N-(2-pyridylmethyl)propionamide, R = Me3; 2,2,2-triphenyl-N-(2-pyridylmethyl)acetamide, R = Ph3)]. Complexes 1–3 were synthesized from the respective ligand and [Cu(CH3CN)4]PF6 in a 2 : 1 molar ratio: [Cu(HL)2]PF6 (1), [Cu2(HLMe3)4](PF6)2 (2), [Cu(HLPh3)2]PF6 (3). Complex 4, [Cu(HL)(CH3CN)(PPh3)]PF6, was synthesized from the reaction of HL with [Cu(CH3CN)4]PF6 and PPh3 in a 1 : 1 : 1 molar ratio. X-Ray crystal structures reveal that complexes 1, 3 and 4 are mononuclear Cu(I) species, while complex 2 is a Cu(I) dimer. The copper ions are four-coordinate with geometries ranging from distorted tetrahedral to seesaw in 1, 2, and 4. Complexes 1 and 2 are very air sensitive and they display similar electrochemical properties. The coordination geometry of complex 3 is nearly linear, two-coordinate. Complex 3 is exceptionally stable with respect to oxidation in the air, and its cyclic voltammetry shows no oxidation wave in the range of 0–1.5 V. The unusual inertness of complex 3 towards oxidation is attributed to the protection from bulky triphenyl substituent of the HLPh3 ligand. A new geometric parameter for four-coordinate compounds, τ4, is proposed as an improved, simple metric for quantitatively evaluating the geometry of four-coordinate complexes and compounds.read more
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Coordination polymers and molecular structures among complexes of mercury(II) halides with selected 1-benzoylthioureas
TL;DR: In this article, six new 1-benzoyl-3-phenyl-thiourea and 1-(2-methylphenyl)thIourea complexes of mercury(II) were obtained in the reactions of the ligands with HgX2 in methanol (X = Cl, Br, I).
Journal ArticleDOI
Advances, Updates, and Analytics for the Computation-Ready, Experimental Metal–Organic Framework Database: CoRE MOF 2019
Yongchul G. Chung,Emmanuel Haldoupis,Benjamin J. Bucior,Maciej Haranczyk,Seulchan Lee,Hongda Zhang,Konstantinos D. Vogiatzis,Konstantinos D. Vogiatzis,Marija Milisavljevic,Sanliang Ling,Sanliang Ling,Jeffrey S. Camp,Ben Slater,J. Ilja Siepmann,David S. Sholl,Randall Q. Snurr +15 more
TL;DR: Over 14 000 porous, three-dimensional metal–organic framework structures are compiled and analyzed as a part of an update to the Computation-Ready, Experimental Metal–Organic Framework Database.
Journal ArticleDOI
Catalytic transformation of dinitrogen into ammonia and hydrazine by iron-dinitrogen complexes bearing pincer ligand
Shogo Kuriyama,Kazuya Arashiba,Kazunari Nakajima,Yuki Matsuo,Hiromasa Tanaka,Kazuyuki Ishii,Kazunari Yoshizawa,Kazunari Yoshizawa,Yoshiaki Nishibayashi +8 more
TL;DR: It is shown that an iron-dinitrogen complex bearing an anionic PNP-pincer ligand works as an effective catalyst towards the catalytic nitrogen fixation, where a mixture of ammonia and hydrazine is produced.
Journal ArticleDOI
Square planar silver(I) complexes: A rare but increasingly observed stereochemistry for silver(I)
Aidan G. Young,Lyall R. Hanton +1 more
TL;DR: The square planar Ag(I) ion is a rare ion, with only ∼2% of all reported silver complexes possessing this stereochemistry as discussed by the authors, despite the fact that there are currently around 65 well characterised complexes containing squareplanar Ag (I) ions, about half of which are coordination polymers.
Journal ArticleDOI
A series of d10 metal coordination polymers based on a flexible bis(2-methylbenzimidazole) ligand and different carboxylates: synthesis, structures, photoluminescence and catalytic properties
TL;DR: In this paper, the influence of different aromatic polycarboxylates on the self-assembly and properties of d10 metal coordination frameworks was explored under hydrothermal conditions and characterized by physicochemical and spectroscopic methods as well as single-crystal X-ray diffraction analysis.
References
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Journal ArticleDOI
Synthesis, structure, and spectroscopic properties of copper(II) compounds containing nitrogen–sulphur donor ligands; the crystal and molecular structure of aqua[1,7-bis(N-methylbenzimidazol-2′-yl)-2,6-dithiaheptane]copper(II) perchlorate
TL;DR: In this article, the linear quadridentate N2S2 donor ligand 1,7-bis(N-methylbenzimidazol-2′-yl)-2,6-dithiaheptane (bmdhp) forms mono-and di-hydrate 1 : 1 copper(II) complexes which are significantly more stable toward autoreduction than those of the non-methylated analogue.
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A critical account on π–π stacking in metal complexes with aromatic nitrogen-containing ligands
TL;DR: In this paper, a geometrical analysis of π-π stacking in metal complexes with aromatic nitrogen-containing ligands was performed based on a Cambridge Structural Database search and on X-ray data of examples.
Journal ArticleDOI
Chemical Redox Agents for Organometallic Chemistry
TL;DR: 1. Advantages and disadvantages of Chemical Redox Agents, 2. Reversible vs Irreversible ET Reagents, 3. Categorization of Reagent Strength.
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Idealized polytopal forms. Description of real molecules referenced to idealized polygons or polyhedra in geometric reaction path form
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Simple Cu(I) complexes with unprecedented excited-state lifetimes.
TL;DR: New, readily accessible copper(I) complexes that can exhibit unusually long-lived, high quantum yield emissions in fluid solution are described.