Lead(II) complexes of proline

Abstract

Three new proline (pro) lead(II) complexes were synthesized and characterized by elemental analyses, IR, 1 H NMR, and 13 C NMR spectroscopy. Single crystal X-ray structural analysis of [Pb(pro)(H 2 O)] n shows the complex to be a novel 1D chain polymer as a result of water bridging. Coordination number of Pb(II) is six, with a 'stereo-chemically active' electron lone pair, and the coordination sphere is hemidirected. The chains interact with each other via weak Pb Á Á Á O intractions and hydrogen bonding to create a 2D framework.

Comprehensive Chemical Characterization of Complexes Involving Lead-Amino Acid Interactions

“…Limited characterization data is available for complexes of lead with amino acid ligands, precluding meaningful comparisons and the development of a self-consistent model for such interactions. Crystallographic data has been reported for complexes of lead with aspartic acid, phenylalanine, isoleucine, and proline, as well as for the nonbiological amino acids d -penicillamine and 3,5-dinitrotyrosine . The data is often specific to an isolated crystal and may or may not be relevant to the solution behavior of the compound.…”

Crystal structures of coordination polymers from CaI2and proline

“…(e.g. Ito et al, 1971;Kato et al, 2008;Magill et al, 1993;Marandi & Shahbakhsh, 2007;Mathieson & Welsh, 1952;Mikhalyova et al, 2010;Oki & Yoneda, 1981). In contrast, the zwitterionic overall neutral amino acids show more analogy to carboxylates; for these, a large variety of coordination modes has been established (Batten et al, 2008).…”

Advances in Crystallography of Coordination Complexes on Main Group Metals with Amino Acid Ligands

“…制备脯氨酸铅配合物的一 般方法是: 将硝酸铅(0.331 g, 1 mmol)溶解在水和甲醇 中, 将脯氨酸(0.115 g, 1 mmol)和氢氧化钠溶液 1 mol/L (1 mL, 1 mmol)在甲醇中混合后, 加入硝酸铅溶液中. 将溶液搅拌, 并在室温下静置几天, 缓慢蒸发, 可得到 适于 X 射线分析的单晶 [119] . [Pb(pro) 2 …”

“…Figure 48 View of supramolecular assemblies in [Pb(pro) 2 (H 2 O)] n via Pb···O interactions and hydrogen bonding [119] 同理, 苯丙氨酸铅配合物[Pb(phe) 2 ] n 的晶体结构也 显示出中心铅为六配位 [120] . 该配合物的单晶是运用 "H" 管的方法培养出来的.…”