Examining the impact of steric and electronic variation in N2S scorpionate ligands on the properties of zinc(II) and cadmium(II) complexes
作者:Nicholas G. Spiropulos、G.C. Chingas、Mallory Sullivan、John T. York、Eric C. Brown
DOI:10.1016/j.ica.2011.07.033
日期:2011.10
Abstract A series of LZn(II)Br (1–4) and LCd(II)Cl complexes (9–11) has been prepared by the reaction of metal halide precursors with the lithium salts of the N2S− ligands bis(3,5-diisopropylpyrazol-1-yl)dithioacetate (L1), bis(3,5-di-tert-butylpyrazol-1-yl)dithioacetate (L2), N-phenyl-2,2-bis(3,5-diisopropylpyrazol-1-yl)thioacetamide (L3) and N-phenyl-2,2-bis(3,5-di-tert-butylpyrazol-1-yl)thioacetamide
摘要通过金属卤化物前体与N2S-配体bis(3,5)的锂盐反应,制备了一系列LZn(II)Br(1-4)和LCd(II)Cl配合物(9-11) -二异丙基吡唑-1-基)二硫代乙酸酯(L1),双(3,5-二叔丁基吡唑-1-基)二硫代乙酸酯(L2),N-苯基-2,2-双(3,5-二异丙基吡唑-1) -基)硫代乙酰胺(L3)和N-苯基-2,2-双(3,5-二叔丁基吡唑-1-基)硫代乙酰胺(L4)。通过X射线晶体学和DOSY NMR研究表明,LZnBr配合物1-4在固态和在溶液中均为单核。配体L1–L4之间的立体差异会导致每个复合物的理想四面体几何形状发生畸变,畸变程度取决于配体取代基的体积。相比之下,X射线晶体学显示相关的配合物L3CdCl在固态下二聚,形成氯桥联的五配位配合物[L3CdCl] 2(10)。尽管有10种固态双核结构,但DOSY NMR研究表明,溶液中存在9-11种单核LCdCl物