Die Komplexchemie des Methylquecksilber‐Kations
Die Komplexchemie des Methylquecksilber‐Kations
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甲基银-阳离子复合化学
DOI：
10.1002/hlca.19650480104
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发表时间：
1965
影响因子：
1.8
通讯作者：
M. Schellenberg
中科院分区：
文献类型：
--
作者：
G. Schwarzenbach;M. Schellenberg
测定了甲基汞与大量配体Lλ−形成的配合物CH 3 HgL 1 −λ的稳定常数（表1）。像H+一样，阳离子CH 3 Hg+几乎完全显示配位数1。一些配体也形成双核加合物（CH 3 Hg）2L 2 −λ，硫化物甚至形成（CH 3 Hg）3S+。但在配体的选择上，CH_3 Hg ~+和H ~+的配位行为有很大的不同，前者是PEARSON意义上的软酸，后者是硬酸。反应：H+ + L− HL的熵ΔS比H + L− HL的熵ΔS正约14 c. u。反应的ΔS：CH 3 HG + + L− CH 3 HgL。水溶液中的氢离子对溶剂的有序化作用远大于CH_3Hg ~+。还研究了两种染料，它们可以作为CH 3 HG+的指示剂和用于测定pCH 3 Hg（= −log[CH 3 Hg +]）。
The stability constants of the methylmercury complexes CH3HgL1−λ with a considerable number of ligands Lλ− have been determined (Table 1). Like H+, the cation CH3Hg+ reveals the coordination number 1 almost exclusively. Some ligands form also binuclear adducts (CH3Hg)2L2−λ and sulfide even forms (CH3Hg)3S+. The coordination behaviours of CH3Hg+ and H+ however are very different concerning the selection of ligands, the former being a soft and the latter a hard acid in the sense of PEARSON. The entropy ΔS of the reaction: H+ + L− HL is more positive by about 14 c.u. than ΔS of the reaction: CH3HG+ + L− CH3HgL. The hydrogen ion in aqueous solution has a far greater order producing action on the solvent than CH3Hg+. Two dyes also have investigated, which may serve as indicators for CH3HG+ and for the determination of pCH3Hg (= −log[CH3Hg+]).