title: C4-Ferrocenylsilyl-bridged and -substituted N-heterocyclic carbenes: complexation of germanium chloride.
abstract: While the 1 : 1 reaction of C4-trichlorosilyl-functionalized N-heterocyclic carbene (NHC) (2) with [(η5-C5H4Li)2Fe]3[TMEDA]2(3) gives C4-sila[1]ferrocenophane-substituted NHC (4), C4-ferrocenylsilyl-bridged bis-NHC (6) is synthesized by combining 3 with C4-chlorodimethylsilyl-functionalized NHC (5) in a 1 : 2 ratio, (compound 5 is prepared by reaction of the anionic N-heterocyclic dicarbene (NHDC) [:C{[N(2,6-Pri2C6H3)]2CHCLi}]n(1) with Me2SiCl2). In addition, ligand 4- and 6-based GeCl2complexes (7 and 8) are also synthesized. Compounds 4-8 have been characterized by1H,13C, and29Si NMR spectroscopy and single crystal X-ray diffraction.
authors.affiliation: Department of Chemistry, The University of Georgia, Athens, Georgia 30602-2556, USA. robinson@uga.edu.
authors.forename: Yuzhong
authors.initials: Y
authors.lastname: Wang
authors.forename: Hunter P
authors.initials: HP
authors.lastname: Hickox
authors.forename: Pingrong
authors.initials: P
authors.lastname: Wei
authors.forename: Gregory H
authors.initials: GH
authors.lastname: Robinson