E. G. Talman, W. Brüning, J. Reedijk
Feb 26, 1997
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Inorganic Chemistry
Abstract
The asymmetrically substituted platinum(II) complexes cis-Pt(NH3)(c-C6H11NH2)Cl2 and trans-Pt(NH3)(c-C6H11NH2)Cl2 have been synthesized and their crystal structures have been determined. Crystals of cis-Pt(NH3)(c-C6H11NH2)Cl2 (1) are orthorhombic, space group Pbca (no. 61) with a = 10.1994(12), b = 10.494(2), c = 18.826(2) A, Z = 8. The structure refinement converged to R1 = 0.0518 and wR2 = 0.1143. Crystals of trans-Pt(NH3)(c-C6H11NH2)Cl2 (2) are monoclinic, space group P21/c (no. 14) with a = 12.141(3), b = 6.0965(9), c = 19.864(3) A, β = 118.71(2)°, Z = 4. The structure refinement converged to R1 = 0.0711 and wR2 = 0.1846. In addition, the Pt(IV) analogues with axial hydroxide ligands have been synthesized. Also the corresponding bis(carboxylato)platinum(IV) compound of formula trans,cis,cis-Pt(NH3)(c-C6H11NH2)Cl2(OOCCH3)2 has been obtained by conversion of the hydroxide with acetic anhydride. Reactions of these platinum complexes with 9-methylhypoxanthine and guanosine-5‘-monophosphate (5‘-GMP) have b...