非线性光学的有机金属配合物。X.分子系统改变(环戊二烯基)的平方和立方超极化率双(膦)钌σ-芳基炔阴离子:钌的X射线晶体结构((Ë)-4,4'--CCC 6 ħ 4 CHC 6 H ^ 4 NO 2)(PPH 3)2(η-C 5 H ^ 5)
摘要:
配合物的Ru(4,4'-CCC 6 H ^ 4 Ç 6 ħ 4 NO 2)(PPH 3)2(η-C 5 H ^ 5)和Ru(4,4'-CCC 6 H ^ 4 Ç CC 6 H ^ 4 NO 2(PPH)3)2(η-C 5 H ^ 5)已经准备好,后者的结构特点;它们属于一系列有机金属供体-桥-受体化合物,其中含有(环戊二烯基)双(膦)钌(II)中心作为供体,共轭芳基乙炔桥和硝基受体基团。为系列复合物的Ru(CCR)(PR'电化学数据3)2(η-C 5 H ^ 5)(RPH,4-C 6 H ^ 4 NO 2,R'博士中,Me; R = 4,4'-C 6 H 4 C 6 H 4 NO 2,(E)-4,4'-C 6 H 4 CHCHC 6 H4 NO 2,4,4'--C 6 H ^ 4 ÇCC 6 H ^ 4 NO 2,4,4'--C 6 H ^ 4 ÑCHC 6 H ^ 4 NO
Ligand redox non-innocent behaviour in ruthenium complexes of ethynyl tolans
作者:Wan M. Khairul、Mark A. Fox、Phil A. Schauer、David Albesa-Jové、Dmitry S. Yufit、Judith A.K. Howard、Paul J. Low
DOI:10.1016/j.ica.2011.02.043
日期:2011.8
A small series of half-sandwich bis(phosphine) ruthenium acetylide complexes [Ru(C CC6H4C CSiMe3) (L-2)Cp'] and [Ru(C=CC6H4C=CC6H4R-4)(L-2)Cp'] (R = OMe, Me, CO2Me, NO2; L-2 = (PPh3)(2), Cp' = Cp; L-2 = dppe; Cp' = Cp*) have been synthesised. One-electron oxidations of these complexes gave the corresponding radical cations, which were significantly more chemically stable in the case of the Ru(dppe) Cp/ derivatives. The representative complex [Ru(C CC6H4C CC6H4OMe-4)(dppe)Cp*] was further examined by spectroelectrochemical (IR and UV-Vis-NIR) methods. The results of the spectroelectrochemical studies, supported by DFT calculations, indicate that the hole is largely supported by the 'RuC CC6H4' moiety in a manner similar to that described previously for simple aryl ethynyl complexes, rather than being more extensively delocalized along the entire conjugated ligand. (C) 2011 Elsevier B. V. All rights reserved.