Metal-Ligand Cooperativity in a Methandiide-Derived Iridium Carbene Complex.
Metal-Ligand Cooperativity in a Methandiide-Derived Iridium Carbene Complex.
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甲烷二化物衍生的铱卡宾配合物中的金属-配体协同作用
DOI:
10.1002/chem.201503936
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发表时间:
2016
期刊:
影响因子:
--
通讯作者:
V. H. Gessner
中科院分区:
文献类型:
--
作者:
J. Weismann;R. Waterman;V. H. Gessner
The synthesis, electronic structure, and reactivity of the first Group 9 carbene complex, [Cp*IrL] [L=C(Ph2PS)(SO2Ph)] (2), based on a dilithio methandiide are reported. Spectroscopic as well as computational studies have shown that, despite using a late transition‐metal precursor, sufficient charge transfer occurred from the methandiide to the metal, resulting in a stable, nucleophilic carbene species with pronounced metal‐carbon double‐bond character. The potential of this iridium complex in the activation of a series of E−H bonds by means of metal‐ligand cooperation has been tested. These studies have revealed distinct differences in the reactivity of2compared to a previously reported ruthenium analogue. Whereas attempts to activate the O−H bond in different phenol derivatives resulted in ligand cleavage, H−H and Si−H activation as well as dehydrogenation of isopropanol have been accomplished. These reactions are driven by the transformation of the carbene to an alkyl ligand. Contrary to a previously reported ruthenium carbene system, the dihydrogen activation has been found to proceed by a stepwise mechanism, with the activation first taking place solely at the metal. The activated products further reacted to afford a cyclometalated complex through liberation of the activated substrates. In the case of triphenylsilane, cyclometalation could thus be induced by a substoichiometric (i.e., catalytic) amount of silane.
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DOI:
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发表时间:
1996
期刊:
影响因子:
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作者:
M. Coles;V. C. Gibson;W. Clegg;M. Elsegood;Peter A. Porrelli
通讯作者:
Peter A. Porrelli
影响因子:
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作者:
P. Schröter;V. H. Gessner
通讯作者:
V. H. Gessner
影响因子:
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作者:
J. Weismann;V. H. Gessner
通讯作者:
V. H. Gessner
DOI:
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发表时间:
2004
期刊:
影响因子:
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作者:
V. Cadierno;J. Díez;Joaquín García‐Álvarez;J. Gimeno;M. Calhorda;L. Veiros
通讯作者:
L. Veiros
DOI:
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发表时间:
1974
期刊:
影响因子:
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作者:
B. James;L. D. Markham;Daniel K. W. Wang
通讯作者:
Daniel K. W. Wang