ChemInform Abstract: Synthesis and Characterization of Nickel(II) Complexes of Purine and Pyrimidine Bases. Crystal and Molecular Structure of trans-Bis( cytosine-O2)bis(ethylenediamine)nickel(II) Bis(tetraphenylborate). An Unusual Metal Binding Mode of C

Abstract

Three nucleobase complexes [Ni(en) 2 (Ade)]Cl 2 , [Ni(en) 2 (Hyp)] Cl.0.5CH 3 OH.H 2 O and [Ni(en) 2 (Cyt) 2 ] [B(C 6 H 5 ) 4 ] 2 (en=ethylenediamine; Ade=adenine; Hyp=hypoxanthine; Cyt=cytosine) have prepared by reaction of Ni(en) 2 Cl 2 and the corresponding purine or pyrimidine base in a methanol or an ethanol-water medium. The cytosine complex was obtained in the form of suitable crystals for X-ray crystallography. The complex crystallizes in the monoclinic space group P2 1 /a