Reactions of molybdenum oxo-complexes with substituted hydrazines. Part 3. The preparation and crystal and molecular structure of an oxo-[dimethylhydrazido(2–)]-complex

Abstract

The oxo-complexes [MoO₂L₂][L = oxinate, S₂CNMe₂, S₂CNEt₂, S₂CN(CH₂)₅, or S₂CNPh₂] react with the hydrazines R₂NNH₂[R₂= Me₂, (CH₂)₅, or Ph₂] to give the hydrazido(2–)-complexes [Mo(NNR₂)OL₂]. The crystal and molecular structure of [Mo(NNMe₂)O(S₂CNMe₂)₂] has been determined by single-crystal X-ray diffraction methods. The complex crystallises in the monoclinic system, space group P2₁/c with a= 7.897, b= 13.854, c= 15.517 Å, β= 103.1°, and Z= 4. The molecule has a distorted octahedral configuration with the hydrazido-ligand bonded linearly in a position cis to the oxo-group. The Mo–N and N–N distances of 1.799 and 1.288 Å are consistent with a mode of bonding closer to the representation [graphic omitted][graphic omitted]N[graphic omitted]R₂ than Mo[graphic omitted]N–NR₂.