Organometallic complexes as ligands. Synthesis oftrans-$$Poverline {dClC( = NR) { C_5 H_3 N(6 - Cl)--- } C^2 } (PPh_3 )_2 $$(R=p—OMeC6H4,CH3,c-C6H11,But) and new information on the isocyanide insertion into the Pd-C σ bond

摘要

The pyridyl complextrans-PdCl{C5H3N(6-Cl)-C2}(PPh3)2 easily undergoes insertion of isocyanides into the palladium—carbon bond via an ionic intermediate to give the title compounds. Details on the insertion pathway were obtained through IR,31P-NMR and conductivity measurements. The presence of the NCCN moiety in the resulting imino(2-pyridyl)methyl palladium(II) complexes is supported by formation of an 1:1 adduct with CuCl