were also determined and the negative values for entropies of activation, ΔS≠, support an associative mode of substitution for all substitution processes. Crystal structure of [Pt(bpma)(pzBr)]Cl2·2H2O was determined by single-crystal X-ray analysis. The coordination geometry of the complex is distorted square-planar while the bond distance Pt–N2(pzBr) is longer than the other three Pt–N distances.
摘要 [Pt(terpy)Cl]+ (terpy = 2,2';6',2''-terpyridine), [Pt(bpma)Cl]+ (bpma = bis(2-pyridylmethyl)amine), [Pt(dien)Cl]+ (dien =
二亚乙基三胺或 1,5-diamino-3-azapentane) 和 [Pt(tpdm)Cl]+ (tpdm = 三
吡啶二
甲烷) 与氮供体杂环分子,如 3-amino-4 -
碘-
吡唑 (pzI)、5-
氨基-4-
溴-3-甲基-
吡唑 (pzBr) 和
咪唑 (Im),在 0.10 M NaClO4
水溶液中在 10 mM NaCl 存在下使用可变温度 UV 进行研究–可见分光光度法。二阶速率常数 k2 表示反应性的降低顺序为 [Pt(terpy)Cl]+ > [Pt(bpma)Cl]+ > [Pt(tpdm)Cl]+ > [Pt(dien)Cl]+