Acta Crystallographica Section C

Crystal Structure Communications

Volume 57, Part 10 (October 2001)

Acta Cryst. (2001). C57, 1159-1161 [doi:10.1107/S0108270101012173]

-Peroxo-bis[trans-chloro(1,4,8,11-tetraazacyclotetradecane)cobalt(III)] bis(tetraphenylborate) diacetone solvate

G. R. Lewis and C. Wilson

Abstract: The title complex, [Co₂Cl₂( [bold mu] -O₂)(cyclam)₂](C₂₄H₂₀B)₂·2Me₂CO, was obtained when [Co(cyclam)Cl₂](BPh₄)₂ was crystallized from acetone in air; cyclam is 1,4,8,11-tetraazacyclotetradecane, C₁₀H₂₄N₄. The peroxo O-O moiety straddles a crystallographic centre of inversion (the two octahedral Co atoms are symmetrically bridged by the O₂ moiety), hence only half of the complex cation is in the asymmetric unit. A comparison of the O-O [1.483 (3) Å], Co-Cl [2.2647 (8) Å] and Co-O [1.894 (2) Å] bond lengths with similar bonds in previously determined structures indicates the oxidation of Co^II to Co^III during the crystallization process. In the crystal lattice, cation dimers are encapsulated by six [BPh₄]^- anions, with C-H [bold pi] hydrogen bonds between the cyclam methylene groups and the phenyl rings of the anion.

Formula: [Co₂Cl₂(O₂)(C₁₀H₂₄N₄)₂](C₂₄H₂₀B)₂·2C₃H₆O

Online 12 October 2001


	PDF file (30.9 kbytes) Supplementary Fig. 3

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