Structural variety and multiple isomerism in 1-(dimethylamino)propyl-2-chalcogenolate and 2-(dimethylamino)propyl-1-chalcogenolate complexes of palladium(II) and platinum(II): Synthesis, spectroscopy and structures. European Journal of Inorganic Chemistry, 22:4510--4520, 2004. [PUMA: aminopropyl aminopropylchalcogenolate aminopropylselenolate;dichalcogenide aminopropylthiolate crystal decompn isomerism;platinum isomerism;thermal multiple palladium platinum platinum;palladium prepn regioisomer structure thiolation]