Coordination chemistry of bis-thiohydroxamic acids: synthesis and characterization of their lead(II) complexes and stability constant determination
作者:Stefan Rupprecht、Klaus Langemann、Thomas Lügger、James M. McCormick、Kenneth N. Raymond
DOI:10.1016/0020-1693(95)04894-4
日期:1996.2
bis-thiohydroxamic acids with linking groups of varying lengths and rigidities are reported as potential Pb2+-specific chelating agents. In contrast to the predictions of CaChe® and CAVAET© molecular mechanics programs, the most rigid ligands of this series do not form discreet Pb2+ complexes, but rather polymers. The less rigid aliphatic linking groups do form discreet complexes with Pb2+, which are
摘要据报道,许多具有不同长度和刚性的连接基团的双硫代异羟肟酸是潜在的Pb2 +特异螯合剂。与CaChe®和CAVAET©分子力学程序的预测相反,该系列中最刚性的配体不会形成离散的Pb2 +复合物,而是形成聚合物。刚性较低的脂族连接基团确实与Pb2 +形成了离散的络合物,其特征在于1H,13C和207Pb NMR。第一种水溶性双硫代异羟肟酸N-羟基-3 2- [2-(2-(羟基-甲基-硫代氨基甲酰基)乙氧基]乙氧基} -N-甲基硫代丙酰胺的合成和X射线晶体结构(11 )进行了说明。11的结构表明分子中的硫代异羟肟酸酯基团呈Z构型并形成弱的分子间氢键,从而形成固态的链结构。发现在50%甲醇/水中与Pb2 +形成的11的常数为1012.53。