Palladium(II) complexes of 1,1,3,3,5,5-hexakis(dimethylamino)-lambda(5)-[1,3,5]triphosphinine

1,1,3,5,5-Hexakis(dimethylamino)-1 lambda(5)-3 lambda(5)-5 lambda(5)- [1,3, 5]triphosphinine (5) reacts with (benzonitrile)(2)PdCl2 to give the chelate complex dichloro(dodeca-N-methyl-1 lambda(5),3 lambda(5),5 lambda(5)-1,3,5 -triphosphinine-1,1,3,3,5,5-hexaamin-C-2,C-4)palladium (6). In a pyridine-d (5) solution of 6 the complex dichloro (dodeca-N-methyl-1 lambda(5),3 lambd a(5),5 lambda(5)-1,3,5-triphosphinine-1,1,3,3,5,5-hexaamin-C-2)((H-2(5))pyr idine-N)palladium (7) is formed. The solute 7 could not be isolated as a so lid, because elimination of the solvent regenerates 6 quantitatively. Prope rties, nmr and ir spectra of 6 and 7 are reported. 6 is characterized by th e results of an X-ray structural analysis.