MoO(S₂)(S₂CNR₂)₂ Complexes (R = Me, Et, Pr, Bu): Improved Syntheses and Thermogravimetric and Nuclear Magnetic Resonance Studies

Abstract

The reactions of MoO (S₂CNR₂)₂ [R=Me, Et, Pr, Bu; formed in situ from the reactions of cis-MoO₂(S₂CNR₂)₂ and PR′₃ (R′= Ph, Bu)] and propylene sulfide in 1,2-dichloroethane (for R = Me) or dichloromethane (others) constitute convenient, high-yield syntheses for the blue, seven-coordinate complexes MoO (S₂)(S₂CNR₂)₂ The complexes have been characterized by elemental analysis, infrared, electronic and ¹H and ¹³C n.m.r. spectroscopy, and mass spectrometry. Thermogravimetric analyses indicate decomposition of the complexes to Mo₂O₂(μ-S)₂(S₂CNR₂)₂ at temperatures greater than 160°C.