Research Article: Di-μ-oxido-bis­[(1,4,8,11-tetra­aza­cyclo­tetra­decane-κ4N,N′,N′′,N′′′)dimangan­ese(III,IV)] bis­(tetra­phenyl­borate) chloride acetonitrile disolvate

Date Published: July 01, 2011

Publisher: International Union of Crystallography

Author(s): Marilyn M. Olmstead, David W. Boyce, Lauren E. Bria.


The title compound, [Mn2O2(C10H24N4)2](C24H20B)2Cl·2CH3CN, is a mixed-valent MnIII/MnIV oxide-bridged mangan­ese dimer with one chloride and two tetra­phenyl­borate counter-anions. There are two non-coordinated mol­ecules of acetonitrile in the formula unit. A center of inversion is present between the two metal atoms, and, consequently, there is no distinction between MnIII and MnIV metal centers. In the Mn2O2 core, the Mn—O distances are 1.817 (3) and 1.821 (3) Å. The cyclam ligand is in the cis configuration. The chloride counter-anion resides on a center of symmetry, whereas the tetra­phenyl­borate counter-anion is in a general position. The cyclam ligand is hydrogen bonded to the acetonitrile as well as to the chloride anion. One of the phenyl rings of the anion and the acetonitrile solvent molecule are each disordered over two sets of sites.

Partial Text

For structures of different salts containing the disordered mixed-valent {[(cyclam)MnO]2}3+ cation, see: Goodson et al. (1990 ▶); Lu et al. (2001 ▶). For structures of the non-disordered MnIII—MnIVO2 core, see: Brewer et al. (1989 ▶); Levaton & Olmstead (2010 ▶). For cyclam configurations, see: Bosnich et al. (1965 ▶).




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