189018-83-5Relevant academic research and scientific papers
Organoimido complexes of tungsten-(VI) and -(V): Correlation between relative orientation of π-donor ligands and electron configuration of the metal
Wesemann, Lars,Waldmann, Ludger,Ruschewitz, Uwe,Ganter, Beate,Wagner, Trixie
, p. 1063 - 1068 (1997)
The high-yield synthesis of the monomeric five-co-ordinate arylimido complex [WCl3(NPh)(OC6H3Pri 2-2,6)] was achieved starting from [{WCl3(NPh)}2(μ-Cl)2]. The adducts [WCl3(NPh)(OC6H3Pri 2-2,6)L] (L = tetrahydrofuran, pyridine (py) or 4-tert-butylpyridine) of the monoalkoxide have been synthesized and the constitution of the pyridine adduct determined by X-ray crystallography. The reduction of the monoalkoxide with 1 equivalent of sodium amalgam in the presence of pyridine or triethylphosphine leads to the paramagnetic adducts [WCl2(NPh)(OC6H3Pri 2-2,6)L2] (L = py or PEt3) which were characterized. A trans configuration was found for the two chlorine atoms and the two σ-donor ligands in the structure analysis. Reorganization of the two π-donor ligands (aryloxide and NPh) from a cis arrangement in the complex with d0 electron configuration to a trans arrangement in the d1 configurated complexes is found and verified by X-ray diffraction analyses.
