N-benzyl substituted N-heterocyclic carbene complexes of iridium(I): Assessment in transfer hydrogenation catalyst
Küçük Resim Yok
Tarih
2013
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Iridium(I) complexes of N-heterocyclic carbenes (NHCs) (1a-3a) were obtained by transmetalation reactions from the corresponding Ag(I)-NHC complexes. These complexes have been fully characterized by 1H, 13C, heteronuclear multiple-bond correlation NMR spectroscopies, and elemental analysis. X-ray diffraction studies on single crystals of 1a and 2a confirm the square planar geometry at the metal center. [IrCl(CO) 2(NHC)] complexes 1b-3b were also synthesized to compare ?-donor/?-acceptor strength of NHC ligands. Transfer hydrogenation (TH) reactions of various ketones and imines have been studied using complexes 1a-3a as precatalysts. N-Benzyl substituted NHC complexes of Ir(I) proved to be highly efficient precatalysts in the reduction of aromatic and aliphatic ketones to afford the corresponding alcohol products with turnover frequencies values up to 24 000 h-1. © 2013 American Chemical Society.
Açıklama
Anahtar Kelimeler
Kaynak
Inorganic Chemistry
WoS Q Değeri
Scopus Q Değeri
Q1
Cilt
52
Sayı
18
