Transition metal α-carbonyl diazoalkane coordination chemistry: structures derived from a side-on diazomalonate platinum complex

The labile side-on α-carbonyl diazoalkane platinum complex (dtbpm-κ2P)Pt[N2C(CO2Me)2-κ2N,N′] (2) displays nucleophilic as well as electrophilic reactivity patterns. H2O is added stoichiometrically, forming the hydrazonido hydroxo platinum(II) complex (dtbpm-κ2P)Pt(OH)[NHNC(CO2Me)2] (3). Protonation of 2 with BF3·OEt2 and MeOH yields [(dtbpm-κ2P)Pt{NHNC(CO2Me)2-κN,κO}]+[BF4]− ([4]+[BF4]−). Both new complexes have been fully characterized spectroscopically and by single crystal X-ray diffraction.