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Unprecedented long-range 1,7-bromination in gold complexes of N-(aryl) imino functionalized N-heterocyclic carbenes

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Title Unprecedented long-range 1,7-bromination in gold complexes of N-(aryl) imino functionalized N-heterocyclic carbenes
 
Creator SAMANTARAY, MK
PANG, KL
SHAIKH, MM
GHOSH, P
 
Subject high-temperature bromination
ring-opening polymerization
electrophilic bromination
ligand
palladium(ii)
olefins
derivatives
tribromide
initiators
convenient
 
Description An unique long-range 1,7-bromination reaction is observed in gold(III) complexes of N-(aryl) imino functionalized N-heterocyclic carbene with the bromination occurring at two different carbon (sp(2) and sp(3)) centers spatially separated by ca. 6.4 angstrom but existing in extended conjugation to each other. In particular, the unusual distant 1,7-brominated gold(III) complexes [1-R-3-{N-(pbromo2,6-di-i-propylphenylimino)-2-phenyl-1-bromoethyl}imidazol-2-ylidene]AuBr(3) [R = Me (1d), i-Pr (2d), t-Bu (3d),-CH(2)Ph (4d)] were synthesized cleanly at room temperature under ambient conditions from the reactions of molecular bromine with the gold(I) complexes [1-R-3{ N-(2,6-di-i-propylphenylimino)-2-phenylethyl} imidazol-2-ylidene]AuCl [R = Me (1c), i-Pr (2c), t-Bu (3c),-CH(2)Ph (4c)]. All of the 1,7-bromination products (1d, 2d, 3d and 4d) have been structurally verified by X-ray diffraction studies.
 
Publisher ROYAL SOC CHEMISTRY
 
Date 2011-08-28T23:46:21Z
2011-12-26T12:58:15Z
2011-12-27T05:47:52Z
2011-08-28T23:46:21Z
2011-12-26T12:58:15Z
2011-12-27T05:47:52Z
2008
 
Type Article
 
Identifier DALTON TRANSACTIONS, (36), 4893-4902
1477-9226
http://dx.doi.org/10.1039/b807830k
http://dspace.library.iitb.ac.in/xmlui/handle/10054/11871
http://hdl.handle.net/10054/11871
 
Language en