Interaction of Dithiophosphinates of Cobalt and Nickel with Pyridine-Type Donors

Article abstract of DOI:10.1246/bcsj.59.3239

The relative isotopic 1H NMR shifts of several pyridine-type base adducts of M(2,4-Me2dtpi)2 were measured.The opposite signs of ring and methyl proton resonance shifts in α- and γ-picoline complexes of nickel indicate that both ?- and ?-mechanisms are operative.In the cobalt cases all proton resonances are shifted down-field suggesting a negative dipolar contribution in addition to contact interaction.The magnetic and electronic spectral studies on these compounds are consistent with either MS4N or MS4N2 chromophores.