Abstract
A series of palladium complexes supported over acyclic diaminocarbene (ADC) ligands were conveniently obtained by the hydroamination of a metal bound isonitrile moiety. In particular, the hydroamination reaction using various secondary amines namely, pyrrolidine, morpholine and piperidene on a palladium isonitrile derivative, cis-[(2,6-i-Pr2C6H3)NC](2)PdCl2, yielded the desired palladium acyclic diaminocarbene (ADC) complexes of the type, cis-[((RNH)-N-1)(R-2)methylidene]PdCl2(CNR1) [R-1 = 2,6-i-Pr2C6H3: R-2 = NC4H8 (1); NC4H8O (2); NC5H10 (3)], under ambient reaction conditions in moderate to good yields (ca. 68-73%). The structural characterization of the palladium complexes (1-3) attested to the formation of the metal bound acyclic diaminocarbene ligand via an intermolecular hydroamination reaction on the metal bound isonitrile moiety in a palladium pre-cursor complex.