Reactivity of organohydrazidomolybdenum(VI) complexes toward tertiary phosphines

Abstract

The reactivity of mixed [organohydrazido(1-)][organohydrazido(2-)]molybdenum(VI) complexes [Mo(NHNRPh)(NNRPh)(acac)X₂] {R = Ph, X = Br (1); R = Ph, X = I (2) and R = Me; X = I (3)} with the tertiary phosphines PPh₃, [PMePh₂ and PMe₂Ph has been investigated. The syntheses of [Mo(NNPh₂)₂Br₂(PPh₃)] (4), [Mo(NNPh₂)₂Br₂(PMePh₂)₂] (5), [Mo(NNPh₂)₂Br₂(PMe₂Ph)₂] (6), [Mo(NNPh₂)₂(acac)I(PPh₃)] (7), [Mo(NNPh₂)₂(acac)(PMePh₂)₂]⁺I⁻ (8) and [Mo(NNMePh)₂(acac)(PMePh₂)₂]⁺I⁻ (9) are reported. Complexes were characterized by analysis, and electronic, IR, ¹H and ³¹P{H} NMR spectroscopy.

Keywords:

• Molybdenum complexes
• Phosphine derivatives
• Hydrazido(2-) complexes

Acknowledgements

The authors acknowledge financial support from FONDECYT Grant 1000437 and Dirección de Investigación y Desarrollo, DID-UACh, of the Universidad Austral de Chile, Grants S 2003–03 and S 2004–03.