Inorganic Chemistry, Vol.45, No.20, 7997-7999, 2006
Synthesis of the first rNHC (remote N-heterocyclic carbene) complexes with no heteroatom in the carbene carbon-containing ring
Two cationic carbene complexes with no heteroatom in the ring containing the carbene carbon, trans-bromo(2-methyl-2,6-dihydroisoquinolin6-ylidene)bis(triphenylphosphine)palladium(II) triflate (3) and trans-chloro(1,2-dimethyl-1,7-dihydroquinolin-7-ylidene)bis(triphenylpho sphine) palladium(II) triflate (4), were synthesized by oxidative substitution of Pd(PPh3)(4) with N-methylated 6-bromoiso-quinolinium and 7-chloro-2-methylquinolinium cations, respectively. Compound 3 was also prepared by methylation of neutral transbromo(2-methylisoquinolin-6-yl) bis(triphenylphosphine) palladium(II) (5). All complexes were unambiguously characterized by NMR and X-ray crystallographic studies.