TY - JOUR
T1 - Unprecedented long-range 1,7-bromination in gold complexes of N-(aryl)imino functionalized N-heterocyclic carbenes
AU - Samantaray, Manoja K.
AU - Pang, Keliang
AU - Shaikh, Mobin M.
AU - Ghosh, Prasenjit
PY - 2008
Y1 - 2008
N2 - 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 (sp2 and sp 3) centers spatially separated by ca. 6.4 Å but existing in extended conjugation to each other. In particular, the unusual distant 1,7-brominated gold(iii) complexes [1-R-3-{N-(p-bromo-2,6-di-i- propylphenylimino)-2-phenyl-1-bromoethyl}imidazol-2-ylidene]AuBr3 [R = Me (1d), i-Pr (2d), t-Bu (3d), -CH2Ph (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), -CH2Ph (4c)]. All of the 1,7-bromination products (1d, 2d, 3d and 4d) have been structurally verified by X-ray diffraction studies.
AB - 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 (sp2 and sp 3) centers spatially separated by ca. 6.4 Å but existing in extended conjugation to each other. In particular, the unusual distant 1,7-brominated gold(iii) complexes [1-R-3-{N-(p-bromo-2,6-di-i- propylphenylimino)-2-phenyl-1-bromoethyl}imidazol-2-ylidene]AuBr3 [R = Me (1d), i-Pr (2d), t-Bu (3d), -CH2Ph (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), -CH2Ph (4c)]. All of the 1,7-bromination products (1d, 2d, 3d and 4d) have been structurally verified by X-ray diffraction studies.
UR - http://www.scopus.com/inward/record.url?scp=50849091947&partnerID=8YFLogxK
U2 - 10.1039/b807830k
DO - 10.1039/b807830k
M3 - Article
C2 - 18766222
AN - SCOPUS:50849091947
SN - 1477-9226
SP - 4893
EP - 4902
JO - Dalton transactions
JF - Dalton transactions
IS - 36
ER -