title: A Straightforward Electrochemical Approach to Imine- and Amine-bisphenolate Metal Complexes with Facile Control Over Metal Oxidation State.
abstract: Synthetic methods to prepare organometallic and coordination compounds such as Schiff-base complexes are diverse, with the route chosen being dependent upon many factors such as metal-ligand combination and metal oxidation state. In this work we have shown that electrochemical methodology can be employed to synthesize a variety of metal-salen/salan complexes which comprise diverse metal-ligand combinations and oxidation states. Broad application has been demonstrated through the preparation of 34 complexes under mild and ambient conditions. Unprecedented control over metal oxidation state (M(II/III/IV) where M=Fe, Mn) is presented by simple modification of reaction conditions. Along this route, a general protocol-switch is described which allows access to analytically pure Fe(II/III)-salen complexes. Tuning electrochemical potential, selective metalation of a Mn/Ni alloy is also presented which exclusively delivers Mn(II/IV)-salen complexes in high yield.
authors.affiliation: School of Chemistry University of Leeds Woodhouse Lane Leeds LS2 9JT United Kingdom.
authors.forename: Michael R
authors.initials: MR
authors.lastname: Chapman
authors.affiliation: School of Chemistry University of Leeds Woodhouse Lane Leeds LS2 9JT United Kingdom.
authors.forename: Susan E
authors.initials: SE
authors.lastname: Henkelis
authors.affiliation: School of Mechanical Engineering University of Leeds Woodhouse Lane Leeds LS2 9JT United Kingdom.
authors.forename: Nikil
authors.initials: N
authors.lastname: Kapur
authors.affiliation: School of Chemistry University of Leeds Woodhouse Lane Leeds LS2 9JT United Kingdom.
authors.forename: Bao N
authors.initials: BN
authors.lastname: Nguyen
authors.affiliation: School of Chemistry University of Leeds Woodhouse Lane Leeds LS2 9JT United Kingdom.
authors.forename: Charlotte E
authors.identifier: 0000-0003-0412-8821
authors.initials: CE
authors.lastname: Willans
keywords: Schiff bases; electrochemistry; organometallic compounds; salen; synthesis