Nitrosyl complexes of molybdenum and tungsten. Part 17. Hydrazido(1–) complexes of [tris(3,5-dimethylpyrazolyl)borato]molybdenum, related tungsten compounds, and the structures of NN-dimethylhydrazido(1–)- and N-methyl-N-phenylhydrazido(1–)iodo(nitrosyl)[tris(3,5-dimethylpyrazol-1-yl)borato]molybdenum

Abstract

The preparations of the compounds [Mo{HB(Me₂pz)₃}(NO)I(NHNRR′)](Me₂pz = 3,5-dimethylpyrazolyl; R = R′= H or Me; R = H, R′= Me or Ph; R = Me, R′= Ph) and [W{HB(Me₂pz)₂(3,5-Me₂-4-BrC₃N₂)}(NO)Br(NHNRR′)](R = R′= H or Me; R = H, R′= Ph) are described. The species with R = R′= H react with acetone giving complexes containing the -NHNCMe₂ group, and the hydrazido(1–) species react with acids causing cleavage of the M–NHNRR′ bond. The structures of [Mo{HB(Me₂pz)₃}(NO)I(NHNRR′)](R = R′= Me; R = Me, R′= Ph) have been determined crystallographically.