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Relative Lability and Chemoselective Transmetallation of NHC in Hybrid Phosphine‐NHC Ligands: Access to Heterometallic Complexes
Author(s) -
Simler Thomas,
Braunstein Pierre,
Danopoulos Andreas A.
Publication year - 2015
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201505958
Subject(s) - transmetalation , lability , chemistry , phosphine , reactivity (psychology) , polymer chemistry , stereochemistry , catalysis , organic chemistry , medicine , alternative medicine , pathology
The relative lability and transmetallation aptitude of trialkylphosphine and NHC donors, integrated in semi‐rigid hybrid ligands attached to [Ag 4 Br 4 ] pseudo‐cubanes, lies in favor of the NHC and is used to selectively access unprecedented NHC complexes with heterobimetallic cores, such as Ag–Cu ( 4 Cy ) and Ag–Ir ( 5 t Bu ). These can be viewed as an arrested state before the full transmetallation of both donors, which gives the homodinuclear Cu ( 3 Cy ) and Ir ( 6 Cy ) complexes. The observed NHC transmetallation aptitude and reactivity urges caution in the common notion that views the NHC as a universal spectator.