Abstract
Pd(PPh3)4-catalyzed decarbonylation of the phosphaketene Mes*PCO (1, Mes* = 2,4,6-(t-Bu)3C6H2) gives the diphosphene Mes*PPMes* (2). Related reactions of 1 with zerovalent Pd and Pt phosphine complexes afford diphosphaureylene complexes ML2[Mes*PC(O)PMes*] (L2 = chelating diphosphine), whose structure and properties depend markedly on the metal and ancillary ligands; Pd(dppf)[Mes*PC(O)PMes*] (12, dppf = 1,1‘-bis(diphenylphosphino)ferrocene) also catalyzes the title reaction.
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