title: Metal complexes of Co, Ni and Cu with the pincer ligand HN(CH2CH2P(i)Pr2)2: preparation, characterization and electrochemistry.
abstract: A series of Co, Ni and Cu complexes with the ligand HN(CH(2)CH(2)P(i)Pr(2))(2) (HNP(2)) has been isolated and their electrochemical behaviour investigated by cyclic voltammetry. The nickel complexes [(HNP(2))NiOTf]OTf and [(HNP(2))NiNCCH(3)](BF(4))(2) display reversible reductions, as does the related amide derivative (NP(2))NiBr. The related copper(I) and cobalt(II) derivatives were also isolated and characterized. The addition of piperidine to [(HNP(2))NiNCCH(3)](BF(4))(2) led to the formation of the new species [(HNP(2))Ni(N(H)C(CH(3))NC(5)H(10))](BF(4))(2). The nucleophilic addition of piperidine to acetonitrile to produce HN=C(CH(3))NC(5)H(10) was found to be catalyzed by [(HNP(2))NiNCCH(3)](BF(4))(2).
authors.affiliation: Department of Chemistry, University of California, Berkeley, CA 94720-1460, USA.
authors.forename: Sergio S
authors.initials: SS
authors.lastname: Rozenel
authors.forename: John B
authors.initials: JB
authors.lastname: Kerr
authors.forename: John
authors.initials: J
authors.lastname: Arnold