Crystallography Journals Online : IUCR Backfile Archive 1948-2001
Chemistry and Pharmacology
In two linkage isomers, bis[1,3-dimethyl-2,4,6(1H,3H,5H)-pyrimidinetrionato]-C5,O4-(ethylenediamine-N,N′)platinum(II), [Pt(C6H7N2O3)2(C2H8N2)], (I), and bis[1,3-dimethyl-2,4,6(1H,3H,5H)-pyrimidinetrionato-C5](ethylenediamine-N,N′)platinum(II) dihydrate, [Pt(C6H7N2O3)2(C2H8N2)]·2H2O, (II), crystallized from the same aqueous solution containing [Pt(en)(OH)2] and 1,3-dimethylbarbituric acid (Hdmbarb) in a 1:2 molar ratio, a pair of monodentate dmbarb− anions coordinate to the Pt atom at tetrahedral C atoms for (II), while one dmbarb− anion coordinates at the carbon and the other at a deprotonated enol oxygen for (I). The Pt—C distances in (I) and (II) are comparable: 2.112 (4) Å for (I), and 2.114 (4) and 2.117 (4) Å for (II).
Type of Medium: