title: A mixed-valence manganese(III)-manganese(IV) di-mu-oxo complex, [(cyclam)MnO]2(ClO4)2(NO3).
abstract: The title dinuclear di-mu-oxo-bis[(1,4,8,11-tetraazacyclotetradecane-kappa(4)N)manganese(III,IV)] diperchlorate nitrate complex, [Mn(2)O(2)(C(10)H(24)N(4))(2)](ClO(4))(2)(NO(3)) or [(cyclam)MnO](2)(ClO(4))(2)(NO(3)), was self-assembled by the reaction of Mn(2+) with 1,4,8,11-tetraazacyclotetradecane in aqueous media. The structure of this compound consists of a centrosymmetric binuclear [(cyclam)MnO](3+) unit, two perchlorate anions and one nitrate anion. While the low-temperature electron paramagnetic resonance spectra show a typical 16-line signal for a di-mu-oxo Mn(III)/Mn(IV) dimer, the magnetic susceptibility studies also confirm a characteristic antiferromagnetic coupling between the electronic spins of the Mn(IV) and Mn(III) ions.
authors.affiliation: Department of Biochemistry, School of Life Science, Nanjing University, Nanjing 210093, People's Republic of China.
authors.forename: Y H
authors.initials: YH
authors.lastname: Lu
authors.forename: H K
authors.initials: HK
authors.lastname: Fun
authors.forename: S
authors.initials: S
authors.lastname: Chantrapromma
authors.forename: I A
authors.initials: IA
authors.lastname: Razak
authors.forename: Z
authors.initials: Z
authors.lastname: Shen
authors.forename: J L
authors.initials: JL
authors.lastname: Zuo
authors.forename: X Z
authors.initials: XZ
authors.lastname: You