Zinc Complexes of a Bioinspired Binucleating Ligand Platform – Equilibria in Solution and Structures in the Solid State
作者:Simone Wöckel、Joanna Gałęzowska、Sebastian Dechert、Wolfram Meyer‐Klaucke、Ebbe Nordlander、Franc Meyer
DOI:10.1002/ejic.201200269
日期:2012.10
The zinc(II) coordination chemistry of the bioinspired bis(tetradentate) ligand 3,5-bisbis[2-(1-methylimidazolyl)methyl]aminomethyl}pyrazole (L) was studied in detail both in solution and in the solid state. Six different species were determined in aqueous solution by means of potentiometry within the pH range 211, namely mononuclear [ZnH2L]4+, dinuclear [Zn2L]4+, [Zn2H1L]3+ and [Zn2H2L]2+, as well
在溶液和固态中详细研究了仿生双(四齿)配体 3,5-双双[2-(1-甲基咪唑基)甲基]氨基甲基}吡唑(L)的锌(II)配位化学. 在 pH 值范围 211 内,通过电位法测定水溶液中的六种不同物质,即单核 [ZnH2L]4+、双核 [Zn2L]4+、[Zn2H1L]3+ 和 [Zn2H2L]2+,以及四核 [ZnH2L]4+ Zn4H5L2]3+ 和 [Zn4H6L2]2+。代表其中四种质子化状态的配合物可以通过 X 射线衍射进行分离和结构表征,即 [ZnH2L(MeCN)](ClO4)4 (1)、[Zn2H1L](SO3CF3)3 (4)、[Zn2H1L (MeOHOMe)](ClO4)2 (5a)、[Zn2H1L(OMe)](ClO4)2 (5b) 和 [(Zn2H1L)2(mu-O)(mu-OH)](ClO4)3 (6) . 此外,还获得了双(吡唑啉酮)桥连络合物 [(ZnH1L)2](ClO4)2