共查询到20条相似文献，搜索用时 15 毫秒
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Mohammad El&#x;Ezzi Romaric Lenk David Madec Jean‐Marc Sotiropoulos Sonia Mallet‐Ladeira Annie Castel 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2015,127(3):819-822
The efficiency of the deprotonated aryl bis‐sulfone [2,6‐{(p‐tolyl)SO2}2C6H3]− as an O,C,O‐coordinating pincer‐type ligand was described. The bis‐sulfone precursor was synthesized using a straightforward palladium‐catalyzed cross‐coupling reaction. As a result of directed ortho metalation (DoM) through sulfonyl groups, a selective lithiation of the aryl group was achieved and the corresponding carbanion was isolated and its structure determined by single‐crystal X‐ray diffraction analysis. A heteroleptic tin(II) complex has been prepared by a nucleophilic substitution reaction. Crystallographic analysis and DFT calculations indicate that the bis‐sulfonyl moiety acts as a new O,C,O‐coordinating pincer‐type ligand with intramolecular SO coordination to a tin(II) center. The cis form with the two nonbonded oxygen atoms of the sulfonyl groups on the same side is preferentially obtained. 相似文献
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Maximilian Joost Pauline Gualco Yannick Coppel Karinne Miqueu Christos E. Kefalidis Laurent Maron Abderrahmane Amgoune Didier Bourissou 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2014,126(3):766-770
Oxidative addition plays a major role in transition‐metal catalysis, but this elementary step remains very elusive in gold chemistry. It is now revealed that in the presence of GaCl3, phosphine gold chlorides promote the oxidative addition of disilanes at low temperature. The ensuing bis(silyl) gold(III) complexes were characterized by quantitative 31P and 29Si NMR spectroscopy. Their structures (distorted Y shape) and the reaction profile of σ(Si Si) bond activation were analyzed by DFT calculations. These results provide evidence for the intermolecular oxidative addition of σ(Si Si) bonds to gold and open promising perspectives for the development of new gold‐catalyzed redox transformations. 相似文献
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Ching‐Chin Chen Peter P.‐Y. Chen 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2012,124(37):9459-9463
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Alessandro Bagno Marcella Bonchio 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2005,117(13):2059-2062
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Olga L. Malkina Vladimir G. Malkin 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2003,115(36):4471-4474