A N3S(thioether)-ligated Cu(II)-superoxo with enhanced reactivity.
A N3S(thioether)-ligated Cu(II)-superoxo with enhanced reactivity.
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DOI:
10.1021/ja511504n
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发表时间:
2015-03-04
影响因子:
15
通讯作者:
Karlin, Kenneth D.
中科院分区:
文献类型:
--
作者:
Kim, Sunghee;Lee, Jung Yoon;Cowley, Ryan E.;Ginsbach, Jake W.;Siegler, Maxime A.;Soomon, Edward I.;Karlin, Kenneth D.
Previous efforts to synthesize a cupric superoxide complex possessing a thioether donor have resulted in the formation of an end-on trans-peroxodicopper(II) species, [{(Ligand)CuII}2(μ-1,2-O22−)]2+. Redesign/modification of previous N3S tetradentate ligands has now allowed for the stabilization of the monomeric, superoxide product possessing a S(thioether)-ligation, [(DMAN3S)CuII(O2•−)]+ (2S), as characterized by UV-vis and resonance Raman (rR) spectroscopies. This complex mimics the putative CuII(O2•−) active species of the copper monooxygenase PHM and exhibits enhanced reactivity towards both O-H and C-H substrates in comparison to close analogues [(L)CuII(O2•−)]+, where L contains only nitrogen donor atoms. Cu-S(thioether) ligation with its weaker donor ability (relative to an N-donor) are demonstrated by comparisons to the chemistry of analogue compounds.
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