Tri(allyl)- and tri(methylallyl)arsine complexes of palladium(ii) and platinum(ii): Synthesis, spectroscopy, photochemistry and structures. New Journal of Chemistry, (27)11:1584--1591, 2003. [PUMA: NMR UV UV;platinum allylarsine allylarsine;palladium crystal ethylcarbamate methylallylarsine palladium platinum prepn pyrazolate structure]