Direct evidence for the attack of a free N-heterocyclic carbene at a carbonyl ligand: A zwitterionic osmium carbonyl cluster

Yu Liu; Rakesh Ganguly; Han Vinh Huynh; Weng Kee Leong

doi:10.1002/anie.201307102

Direct evidence for the attack of a free N-heterocyclic carbene at a carbonyl ligand: A zwitterionic osmium carbonyl cluster

Yu Liu, Rakesh Ganguly, Han Vinh Huynh, Weng Kee Leong

Research output: Contribution to journal › Article › peer-review

22 Citations (Scopus)

Abstract

A key suspect arrested: The initial site of attack of a free N-heterocyclic carbene (NHC) on the triosmium carbonyl cluster [Os₃(CO) ₁₂] was found to be a carbonyl ligand. The stable zwitterionic species thus formed (blue background in the scheme) was characterized crystallographically. CO substitution proceeds from this intermediate by the loss of a CO group and migratory deinsertion.

Original language	English
Pages (from-to)	12110-12113
Number of pages	4
Journal	Angewandte Chemie - International Edition
Volume	52
Issue number	46
DOIs	https://doi.org/10.1002/anie.201307102
Publication status	Published - Nov 11 2013
Externally published	Yes

ASJC Scopus Subject Areas

Catalysis
General Chemistry

Keywords

carbonyl complexes
N-heterocyclic carbenes
nucleophilic substitution
osmium clusters
zwitterions

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10.1002/anie.201307102

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abstract = "A key suspect arrested: The initial site of attack of a free N-heterocyclic carbene (NHC) on the triosmium carbonyl cluster [Os3(CO) 12] was found to be a carbonyl ligand. The stable zwitterionic species thus formed (blue background in the scheme) was characterized crystallographically. CO substitution proceeds from this intermediate by the loss of a CO group and migratory deinsertion.",

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AU - Ganguly, Rakesh

AU - Huynh, Han Vinh

AU - Leong, Weng Kee

PY - 2013/11/11

Y1 - 2013/11/11

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AB - A key suspect arrested: The initial site of attack of a free N-heterocyclic carbene (NHC) on the triosmium carbonyl cluster [Os3(CO) 12] was found to be a carbonyl ligand. The stable zwitterionic species thus formed (blue background in the scheme) was characterized crystallographically. CO substitution proceeds from this intermediate by the loss of a CO group and migratory deinsertion.

KW - carbonyl complexes

KW - N-heterocyclic carbenes

KW - nucleophilic substitution

KW - osmium clusters

KW - zwitterions

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Direct evidence for the attack of a free N-heterocyclic carbene at a carbonyl ligand: A zwitterionic osmium carbonyl cluster

Abstract

ASJC Scopus Subject Areas

Keywords

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