Synthesis and characterization oxo-imido [tris (3,5-dimethyl-pyrazol) borate] molybdenum complexes

Abstract

In this study two new reactions related to oxo-Molybdenum(V)trispyrazolyl chemistry were investigated. The reactions between [MoTp*(O)Cl2] with o-substituted anilines, H2NC6H4X-o (X. Cl, Br) in the presence of triethylamine in toluene carried out to prepare dinuclear oxo-imido Mo(V) complexes of the type [MoTp*(O)Cl](.-O)[MoTp(Cl)(.NC6H4X-o)]. Surprisingly, the previously reported compound, [MoTp*(O)Cl]2(.-O)], was obtained as the major product of both reactions. The compound [MoTp(O)Cl]2(.-O)] was characterized by 1H-NMR; IR, UV-visible spectroscopy techniques.