Substitution effects on the formation of T-shaped palladium carbene and thioketone complexes from Li/Cl carbenoids.
Substitution effects on the formation of T-shaped palladium carbene and thioketone complexes from Li/Cl carbenoids.
复制标题
Li/Cl类胡萝卜素形成T形钯卡宾和硫酮配合物的取代效应。
DOI:
10.1002/chem.201304927
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发表时间:
2014
期刊:
影响因子:
--
通讯作者:
V. H. Gessner
中科院分区:
文献类型:
--
作者:
Sebastian Molitor;Kai‐Stephan Feichtner;Claudia Kupper;V. H. Gessner
The preparation of palladium thioketone and T-shaped carbene complexes by treatment of thiophosphoryl substituted Li/Cl carbenoids with a Pd(0) precursor is reported. Depending on the steric demand, the anion-stabilizing ability of the silyl moiety (by negative hyperconjugation effects) and the remaining negative charge at the carbenic carbon atom, isolation of a three-coordinate, T-shaped palladium carbene complex is possible. In contrast, insufficient charge stabilization results in the transfer of the sulfur of the thiophosphoryl moiety and thus in the formation of a thioketone complex. While the thioketones are stable compounds the carbene complexes are revealed to be highly reactive and decompose under elimination of Pd metal. Computational studies revealed that both complexes are formed by a substitution mechanism. While the ketone turned out to be the thermodynamically favored product, the carbene is kinetically favored and thus preferentially formed at low reaction temperatures.
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影响因子:
--
作者:
P. Schröter;V. H. Gessner
通讯作者:
V. H. Gessner
影响因子:
4.3
作者:
Gessner, Viktoria H.;Meier, Florian;Kaupp, Martin
通讯作者:
Kaupp, Martin
影响因子:
16.6
作者:
Cooper, Oliver J.;Mills, David P.;Liddle, Stephen T.
通讯作者:
Liddle, Stephen T.
影响因子:
15
作者:
Stambuli, JP;Incarvito, CD;Hartwig, JF
通讯作者:
Hartwig, JF
影响因子:
--
作者:
Oliver J. Cooper;Ashley J. Wooles;J. McMaster;W. Lewis;A. Blake;S. Liddle
通讯作者:
Oliver J. Cooper;Ashley J. Wooles;J. McMaster;W. Lewis;A. Blake;S. Liddle