Synthesis and characterization of cis-Mo(CO)4(L-L′) and cis-Mo(CO)2(L-L′)2 complexes of N(1)-methyl-2-(arylazo)imidazoles (L-L′).: Correlations of spectroscopic data with substituent effects

被引：21

作者：

Ackermann, MN ^{[1
]}

Robinson, MP ^{[1
]}

Maher, IA ^{[1
]}

LeBlanc, EB ^{[1
]}

Raz, RV ^{[1
]}

机构：

[1] Oberlin Coll, Dept Chem, Oberlin, OH 44074 USA

来源：

JOURNAL OF ORGANOMETALLIC CHEMISTRY | 2003年 / 682卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

2-(arylazo)imidazole complexes; molybdenum(0) complexes; nuclear magnetic resonance; azoimine complexes;

D O I：

10.1016/S0022-328X(03)00793-9

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

N(1)-Methyl-2-(p-X-phenylazo)imidazoles (L-L'; X = CH3O, CH3, H, Br, CF3, NO2) react with cis -(norbornadiene)MO(CO)(4) and MO(CO)(3)(CH3CN)(3) to provide the complexes CiS-MO(CO)(4)(L-L) (X = CH3O, CH3, H, Br, CF3, NO2) and CiS-MO(CO)(2)(L-L')(2) (X = CH3, H, Br, CF3), respectively. The complexes were characterized by visible and infrared spectroscopy, by H-1-, C-13- and Mo-95-NMR spectroscopy, and by cyclic voltammetry. Correlations among the data and correlations of the data with the Hammett sigma parameter within each set of complexes were investigated and are generally very good. These data, as well as the inability to synthesize complexes of the type Mo(L-L')(3), indicate that 2-(arylazo)imidazoles are less effective ligands at stabilizing complexes of zerovalent metals than are 2-(arylazo)pyridines. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：248 / 254

页数：7

共 40 条

[1] Synthesis and studies of cis-Mo(CO)2(L-L′)2 and Mo(L-L′)3 complexes of 2-(phenylazo)pyridines (L-L′) and the crystal structures of Mo(CO)2(4-methyl-2-(phenylazo)pyridine)2 and Mo(4-methyl-2-(phenylazo)pyridine)3 [J].