A Raman spectroscopic study of molybdenum and tungsten dioxo complexes containing related cyclopentadienyl and trispyrazolylborato ligands

摘要

Raman spectroscopic investigations of the complexes Tp~*MO_2Me, Cp~*MO_2Me (M = Mo, W) and Cp~*WO_2(n-Bu) (Tp~* = hydrotris(3,5-dimethylpyrazolyl)borate, Cp~* = pentamethyl-cycopentadienyl, Me = methyl, n-Bu = n-butyl) are presented. A characteristic shift of the metal oxygen stretching vibrations is observed, which can be used as indicator for the donor ability of the ligands Tp~* and Cp~*. Force field calculations confirm these observations.