Crystal and molecular structure of cis-dichloroethionineplatinum(II) and its interaction with adenine, hypoxanthine, cytosine and their nucleosides
作者:Badar Taqui Khan、K. Venkatasubramanian、K. Najmuddin、S. Shamsuddin、S.M. Zakeeruddin
DOI:10.1016/s0020-1693(00)85382-7
日期:1991.1
sulfur atoms to form a six-membered ring which adopts a skewed chair conformation. The predominant force of packing in this complex is the intermolecular hydrogen bonding between the two free carboxylic acid groups of adjacent molecules of ethionine. These are reinforced by weak NH…Cl bonds to stabilise crystal packing. Mixed ligand complexes of Pt(II)ethionine with adenine, adenosine, hypoxanthine, ionosine
摘要用X射线衍射法测定了专利化合物顺式-二氯乙硫铂(II)的晶体和分子结构。该复合物在单斜空间群P 2 1 / n中具有4个分子的结晶,其晶胞尺寸为a = 7.223(1),b = 14.435(1),c = 11.012(2)A,β= 97.69(2)° 。该结构通过重原子方法求解,对于1573个观察到的反射,已将其精炼为R值为0.031。在顺式-二氯乙硫基铂(II)中,乙硫氨酸分子通过氨基氮和硫原子与铂配位,形成六元环,该环具有倾斜的椅子构象。在该络合物中的主要堆积力是相邻的乙硫氨酸分子的两个游离羧酸基团之间的分子间氢键。它们通过弱的NH…Cl键得到增强,以稳定晶体堆积。合成了Pt(II)乙硫氨酸与腺嘌呤,腺苷,次黄嘌呤,离子胞苷,胞嘧啶和胞嘧啶核苷的混合配体复合物,并通过元素分析,电导率测量,IR和1 H NMR光谱研究对其进行了表征。在腺嘌呤,腺苷,次黄嘌呤和ionosine的复合物中,配体与金属离子的结合位点为N