Synthesis of Cyclic and Acyclic Carbene Complexes Derived from Isocyanide Ligands in Complexes of Palladium(II) and Platinum(II)

Abstract

Aziridine reacts spontaneously in THF at room temperature or below with the coordinated RNC ligand in some neutral and cationic isocyanide complexes of Pd(II) and Pt(II) to yield 5-membered cyclic diaminocarbene complexes, respectively. Reactions between thiirane and Pd(II) isocyanide complexes yield the corresponding cyclic amino-thiocarbene derivatives. In the presence of NaCl, oxirane is observed to react in 2-chloroethanol with some Pt(II) isocyanide complexes to form the corresponding 5-membered cyclic aminooxy carbene complexes. Also hydrido-alkyl-carbene derivatives were prepared by reaction of azetidine with some hydrido-alkyl-isocyanide compounds.These latter complexes react with triphenylphosphine eliminating H-R_x derived from Pt-R_x cleavage by NH.