PENICILLAMINE COMPLEXES OF NICKEL, CHROMIUM, AND MOLYBDENUM - STRUCTURAL PARTICULARITY AND BIOLOGICAL MEDICAL RELEVANCE

The compounds Tl2[Ni(II)(H2O)6][Ni(II)(D-pen)(L-pen)]2[Ni(II)(SCN)2(H2O)4] 1, TI[Ni(II)(D-pen)2H] . H2O 2, TI[Cr(III)(D-pen)2] 3, and Na2[Mo2(V)O4(pen)2] . 3 CH3OH . 3 H2O 4 have been pre pared by the reaction of nickel nitrate (for 1), nickel acetate (for 2), potassium chromate (for 3), and sodium molybdate (for 4) with D- and D,L-penicillamine, respectively. They were characterized by single-crystal X-ray structure analysis and other physical methods. Whereas penicillamine acts as a bidentate (N, S)-ligand in 1 and 2, Cr(III) (in 3), and Mo(V) (in 4) are coordinated to the three ligand atoms N, O, and S. The presence of three different types of Ni(II)-complexes a cationic, a neutral, and an anionic one in 1 is remarkable. For crystal data see Inhaltstibersicht.