Synthesis and characterization of novel homo- and heterobimetallic palladium(0) and platinum(0) complexes of olefinic bismacrocyclic ligands.

Molecular structures featuring one or two triolefinic 15-membered azamacrocycles (1 and 6) as well as their homo- and heterobimetallic complexes of palladium(0) and platinum(0) (3, 4, and 7) have been synthesized from biphenyl-4,4'-disulfonyl chloride. The strategy employed allows easy preparation of heterobimetallic complexes in a controlled manner. Pulsed-Field Gradients Spin-Echo (PFGSE) NMR techniques together with different mass spectrometry techniques can provide highly useful information about the structure of these polynuclear complexes.