Structural Characterization of (Diphenylhydrazido)vanadium(V) Compounds

Abstract

Diphenylhydrazido)vanadium(V) triisopropoxide was synthesized by the reaction of VO(O i Pr) 3 with N,N-diphenylhydrazine. The m-isopropoxido-bridged dimeric structure was observed in the molecular structure of (diphenylhydrazido)vanadium(V) triisopropoxide. The near-linear V(1)-N(1)-N(2) angle of 173.7(3)8 with the V(1)-N(1) distance of 1.667(4) Å indicates that the imido nitrogen has large participation of an sp-hybridized character. The phenyl substituents of the hydrazido moiety were found to conjugate with the NÀN bond. Furthermore, CH-p intermolecular interaction between two benzene rings was observed to induce polymeric structure in a solid state. (Diphenylhydrazido)vanadium(V) nitrilotriethoxide was obtained by the treatment of (diphenylhydrazido)vanadium(V) triisopropoxide with 2,2',2''-nitrilotriethanol. The slightly increased imido angle (V(1)-N(1)-N(2), 176.4(5)8) was observed as compared with (diphenylhydrazido)vanadium(V) triisopropoxide probably because of the apical coordination of the nitrogen.[a] T.