title: Redox-noninnocence of N,N'-bis(6-methyl-2-pyridylmethylene)ethane-1,2-diamine (L): synthesis and characterization of diamagnetic [Ni(II)2(L**)2] and [Zn(II)2(L)Cl4]((L**)2- pi diradical dianion of L).
abstract: The synthesis of two diamagnetic dinuclear complexes [Ni(II)2(L**)2] (1) and [Zn(II)2(L)Cl4] (2) and an octahedral, paramagnetic, mononuclear complex [Fe(II)(L)Cl2] (3) (S = 2) is reported; the tetradentate ligand N,N'-bis(6-methyl-2-pyridylmethylene)ethane-1,2-diamine, L, is shown to be redox noninnocent. It exists in its neutral closed-shell form L in 2 and 3 and in its dianionic diradical form, (L**)2-, in 1.
authors.affiliation: Max-Planck-Institut für Bioanorganische Chemie, Stiftstrasse 34-36, D-45470 Mülheim an der Ruhr, Germany.
authors.forename: Amrita
authors.initials: A
authors.lastname: Mondal
authors.forename: Thomas
authors.initials: T
authors.lastname: Weyhermüller
authors.forename: Karl
authors.initials: K
authors.lastname: Wieghardt
mesh_terms: D000838:Anions / Q000737:chemistry*; D018360:Crystallography, X-Ray; D003959:Diamines / Q000737:chemistry*; D008024:Ligands; D008280:Magnetics; D008958:Models, Molecular; D009532:Nickel / Q000737:chemistry*; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry*; D010084:Oxidation-Reduction; D011725:Pyridines / Q000737:chemistry*; D015032:Zinc / Q000737:chemistry*
chemical_list: D000838:Anions; D003959:Diamines; D008024:Ligands; C546320:N,N'-bis(6-methyl-2-pyridylmethylene)ethane-1,2-diamine; D009942:Organometallic Compounds; D011725:Pyridines; D009532:Nickel; D015032:Zinc