Stereochemical and electronic control of the copper(<scp>II</scp>)/(<scp>I</scp>) couple by N<sub>2</sub>S<sub>4</sub>-donor macrocycles
作者:Nigel Atkinson、Alexander J. Blake、Michael G. B. Drew、George Forsyth、Aidan J. Lavery、Gillian Reid、Martin Schröder
DOI:10.1039/c39890000984
日期:——
The N2S4 donor complex [Cu(L1)]2+(L1= 1,4,10,13-tetrathia-7,16-diazacyclo-octadecane) shows a chemically reversible copper (II)/(I) couple at E½–0.31 V vs. Fc/Fc+(ferrocene/ferrocenium), whereas the methylated analogue, [Cu(L2)]2+(L2= 7,16-dimethyl-1,4,10,13-tetrathia-7,16-diazacyclo-octadecane) shows a more anodic copper(II)/(I) couple at E½+ 0.06 V vs. Fc/Fc+˙; these differences in redox potential
N 2 S 4供体配合物[Cu(L 1)] 2+(L 1 = 1,4,10,13-thiathia-7,16-diazacyclo-octadecane)显示出化学可逆的铜(II)/(I)夫妇Ë ½ -0.31 V对比的Fc / Fc的+(二茂铁/二茂铁鎓),而甲基化的类似物,[铜(L 2)] 2+(L 2 = 7,16 -二甲基- 1,4,10,13- -tetrathia -7,16-二氮杂环十八烷)示出了更阳极铜(II)/(我)夫妇Ë ½ + 0.06 V对比的Fc / Fc的+˙; 这些氧化还原电位的差异可能与铜(II)配合物的立体化学特征有关,该配合物的晶体结构已确定为[Cu(L 1)] 2+和[Cu 2(L 2)(NCMe)2 ] 2+。