Small bite-angle diphosphines — Synthesis and structure of low-valent complexes of bis(di-ortho-tolylphosphino)methane (dotpm) and related ligands

2006 ◽  
Vol 84 (2) ◽  
pp. 319-329 ◽  
Author(s):  
Maria Filby ◽  
Antony J Deeming ◽  
Graeme Hogarth ◽  
Mo-yin (Venus) Lee
Keyword(s):  
Coordination Chemistry ◽  
Transition Metal ◽  
Key Words ◽  
Crystal Structures ◽  
Cone Angle ◽  
Bite Angle ◽  
Mononuclear Complexes ◽  
Low Valent ◽  
Derivatives Of ◽  
Complex Crystal

The coordination chemistry of bis(di-ortho-tolylphosphino)methane (dotpm) has been studied. It is an excellent chelating ligand and a range of low-valent mononuclear complexes have been prepared; cis-[M(CO)4(η2-dotpm)] (M = Cr, Mo, W; 1–3), [CpRuCl(η2-dotpm)] (4), and cis-[MX2(η2-dotpm)] (M = Pt, X = Cl, Br, I; 5a–5c, M = Pd, X = Cl; 6). The backbone protons are relatively acidic and can be deprotonated using n-BuLi or LiN(SiMe3)2. Subsequent alkylation by RX (X = halogen; R = Me, Et, CH2Ph) affords cis-[M(CO)4(η2-Rdotpm)] (M = Cr, Mo, W, R = Me; 7–9, M = Mo, W, R = Et, CH2Ph; 12–15), [CpRuCl(η2-Medotpm)] (10), and cis-[PtI2(η2-Medotpm)] (11). Thermolysis of cis-[Mo(CO)4(η2-Medotpm)] (8) yields what is believed to be the coordinately and electronically unsaturated complex [Mo(CO)3(η2-Medotpm)] (16), suggesting that derivatives of dotpm (cone angle 194°) are bulky enough to stabilize a 16-electron complex. Crystal structures of 2, 3, 7–9, 13, and 14 have been determined (diphosphine bite angles ranging from 66.58(3)° to 70.96(5)°.Key words: diphosphine, transition metal, bulky, carbonyl, ortho-tolyl.

scholarly journals Transition metal complexes with Girard reagents and their hydrazones

2012 ◽  
Vol 77 (9) ◽  
pp. 1129-1155 ◽  
Author(s):  
Ljiljana Vojinovic-Jesic ◽  
Sladjana Novakovic ◽  
Vukadin Leovac ◽  
Valerija Cesljevic
Keyword(s):  
Coordination Chemistry ◽  
Transition Metal ◽  
Metal Complexes ◽  
Organic Compounds ◽  
Transition Metal Complexes ◽  
Structural Characteristics ◽  
Chemical Properties ◽  
Synthetic Methods ◽  
Short Introduction ◽  
Derivatives Of

This is the first review dealing with the coordination chemistry of metal complexes with Girard's reagents and their hydrazones. The short introduction points out to chemical properties and significance of these organic compounds. The next section briefly describes synthetic methods for preparing complexes with Girard's reagents, as well as modes of coordination of these ligands. The last two extensive sections review the preparation, stereochemistry and structural characteristics of metal complexes with Girard's hydrazones, including some newer non-hydrazonic derivatives of Girard's reagents, also.

Synthesis and X-Ray Crystal Structures of Mononuclear Complexes of 1,3-Bis(8-quinolyloxy)propane

2002 ◽  
Vol 55 (11) ◽  
pp. 705 ◽  
Author(s):  
Muna R. A. Al-Mandhary ◽  
Peter J. Steel
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Crystal Structures ◽  
Transition Metal Complexes ◽  
Bidentate Ligand ◽  
Chloride Complex ◽  
Tetradentate Ligand ◽  
Nitrate Complex ◽  
X Ray ◽  
Mononuclear Complexes

The preparations and X-ray crystal structures of the first transition metal complexes of 1,3-bis(8-quinolyloxy)propane (2) are described. The ligand acts as a trans-chelating N,N′-bidentate ligand in the three-coordinate silver(I) nitrate complex (3) and four-coordinate copper(II) chloride complex (4), but as an N,O,O′,N′-tetradentate ligand in the octahedral nickel(II) chloride complex (5).

scholarly journals Thiophene-containing thiolato dimers, oxygen inserted Cu(II) complex, crystal structures, molecular docking and theoretical studies

2016 ◽  
Vol 69 (11-13) ◽  
pp. 2015-2023 ◽  
Author(s):  
Shaikh M. Mobin ◽  
Mohd. Tauqeer ◽  
Akbar Mohammad ◽  
Veenu Mishra ◽  
Pratibha Kumari
Keyword(s):  
Molecular Docking ◽  
Crystal Structures ◽  
Theoretical Studies ◽  
Complex Crystal

scholarly journals Functionalised Terpyridines and Their Metal Complexes—Solid-State Interactions

Chemistry ◽  
2021 ◽  
Vol 3 (1) ◽  
pp. 199-227
Author(s):  
Young Hoon Lee ◽  
Jee Young Kim ◽  
Sotaro Kusumoto ◽  
Hitomi Ohmagari ◽  
Miki Hasegawa ◽  
...  
Keyword(s):  
Solid State ◽  
Metal Complexes ◽  
Crystal Structures ◽  
Weak Interactions ◽  
Dispersion Interactions ◽  
Derivatives Of

Analysis of the weak interactions within the crystal structures of 33 complexes of various 4′-aromatic derivatives of 2,2′:6′,2″-terpyridine (tpy) shows that interactions that exceed dispersion are dominated, as expected, by cation⋯anion contacts but are associated with both ligand–ligand and ligand–solvent contacts, sometimes multicentred, in generally complicated arrays, probably largely determined by dispersion interactions between stacked aromatic units. With V(V) as the coordinating cation, there is evidence that the polarisation of the ligand results in an interaction exceeding dispersion at a carbon bound to nitrogen with oxygen or fluorine, an interaction unseen in the structures of M(II) (M = Fe, Co, Ni, Cu, Zn, Ru and Cd) complexes, except when 1,2,3-trimethoxyphenyl substituents are present in the 4′-tpy.

scholarly journals Facile synthesis of novel, known, and low-valent transition metal phosphates via reductive phosphatization

2021 ◽  
Author(s):  
Niklas Stegmann ◽  
Hilke Petersen ◽  
Claudia Weidenthaler ◽  
Wolfgang Schmidt
Keyword(s):  
Transition Metal ◽  
Oxidation States ◽  
Facile Synthesis ◽  
Metal Phosphates ◽  
Low Valent

Novel and known low valent transition metal phosphates (TMPs) are accessible via a novel and facile pathway. The method allows syntheses of TMPs also with reduced oxidation states. The key...

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