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DOI: 10.1039/A704460G (Paper) Reference Section for: J. Chem. Soc., Dalton Trans., 1997, 4407-4410

Cytosine nucleobase as a tridentate ligand: Metal binding to N3, N4 and O2 in the trinuclear complex cis-[Pt(NH3)2(mcyt)2{Pd(en)}2][NO3]4·H2O (mcyt = 1-methylcytosinate, en = ethane-1,2-diamine)

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Dagmar Holthenrich, Ennio Zangrando, Elisabetta Chiarparin, Bernhard Lippert and Lucio Randaccio

Abstract

The reaction of cis-[Pt(NH3)2(Hmcyt-N[hair space] 3)2][NO3]2 with [Pd(en)(H2O)2][NO3]2 (Hmcyt = 1-methylcytosine; en = ethane-1,2-diamine) yielded the trinuclear complex cis-[Pt(NH3)2(mcyt-N[hair space] 3,N[hair space] 4,O[hair space] 2)2{Pd(en)}2][NO3]4·H2O, in which the anionic 1-methylcytosinato ligands (mcyt) adopt a head-to-tail arrangement, with Pt co-ordinated to N3 of two mcyt nucleobases, and both Pd metal ions having a mixed N4,O2 donor set. Crystal data: orthorhombic, space group Pbcn, a = 20.903(2), b = 13.510(1), c = 12.024(1) Å, U = 3395.5(9) Å3, Z = 4. The Pt[hair space][hair space]· · ·[hair space][hair space]Pd distances within the trinuclear cation are 2.9365(6) Å.

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