Tetrahedral coordination by a seven-membered chelate ring

Article Article scientifique Article Tetrahedral coordination by a seven-membered chelate ring eng 1998-07 author Broughton Vanessa 27829 author Bernardinelli Gérald Hugues 24765 author Williams Alan Francis 25350 279-288 10.1016/S0020-1693(97)00078-9 0020-1693 https://linkinghub.elsevier.com/retrieve/pii/S0020169397000789 The ligand 1,2-bis(benzimidazol-2-yl)ethane (1a) and its N,N′-dioctyl (1b), N,N′-bis(3,5-dimethoxybenzyl) (1c) and 5,5′-dimethyl-N,N′-diethyl (1d) derivatives have been prepared. With MCl₂ the ligands give complexes [MLCl₂] (M=Mn, Fe, Co, Ni, Cu, Zn) which generally appear to have tetrahedral coordination geometry. X-ray crystal structures of [Cu(1c)Cl₂]·MeCN, [Cu(1c)Br₂] and [Mn(1d)Cl₂]·MeCN have been determined, and show tetrahedral coordination of the metal, the copper(II) complexes showing significant distortion from ideal tetrahedral character. Comparison with other results in the literature, coupled with simple molecular mechanics calculations, suggests that the tetrahedral character may be favoured by the seven-membered chelate ring in which puckering is limited by the presence of two double bonds in the ring. Nitrogen ligand complexes Chelate ring complexes Transition metal complexes Tetrahedral complexes Seven-membered rings Conformation Dewey 540 40 Département de chimie minérale, analytique et appliquée 145 false Inorganica Chimica Acta 275-276 534ded88-87a5-4940-9fba-f9043dbbe095 Article (Published version) Restricted 1-s2.0-S0020169397000789-main.pdf 2170889 application/pdf restrictedAccess Faculté des sciences / Section de chimie et biochimie / Département de chimie minérale, analytique et appliquée

Title	Published in	Access level	OA Policy	Year	Views	Downloads

Tetrahedral coordination by a seven-membered chelate ring	Inorganica Chimica Acta			1998	140	0

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Broughton, Vanessa