title: Activation of -N=CH- bond in a Schiff base by divalent nickel monitored by NMR evidence.
abstract: The Schiff base, 2-salicylidene-4-aminophenyl benzimidazole in ethanol undergoes activation of -N=CH- bond by Ni(2+) in the presence of ammonia or primary alkyl amine to produce nickel complexes of the formula Ni{o-C(6)H(4)(O)CH NR}(2) . n H(2)O [R  =  H, Me; n  =  0; R  =  Et, n =  0.5] and 4-aminophenyl benzimidazole. The products have been identified by elemental analysis, magnetic susceptibility measurements and IR, ESR, mass and extensive NMR spectral studies. The possible mechanism for the activation of -N=CH- bond has also been proposed.
authors.affiliation: Postgraduate Department of Chemistry, V. V. Pura College of Science, Bangalore, India.
authors.forename: M
authors.initials: M
authors.lastname: Chandrakala
authors.forename: N M
authors.initials: NM
authors.lastname: Nanje Gowda
authors.forename: K G S
authors.initials: KG
authors.lastname: Murthy
authors.forename: K R
authors.initials: KR
authors.lastname: Nagasundara