Acta Cryst. (2007). E63, m1573-m1575  [ doi:10.1107/S1600536807020752 ]

Cocrystal of (2-guanidinobenzimidazole-²N,N')[hydridotris(3,5-methylphenylpyrazolyl)borato-³N,N',N'']cobalt(II) perchlorate and (2-guanidinobenzimidazolato-²N,N')[hydridotris(3,5-methylphenylpyrazolyl)borato-³N,N',N'']cobalt(II) methanol solvate monohydrate

H.-S. He

Abstract: In the title cocrystal, {[Co(C₈H₉N₅)(C₃₀H₂₈BN₆)]ClO₄}·[Co(C₈H₉N₅)(C₃₀H₂₇BN₆)]·CH₃OH·H₂O, two independent complexes co-crystallize in the asymmetric unit, together with methanol and water solvent molecules and a perchlorate anion. Each Co²⁺ ion is five-coordinated by three N atoms from a hydridotris(3,5-methylphenyl)borate group and two N atoms from a 2-guanidinobenzimidazolyl (GBI) ligand. In one molecule, GBI binds to Co²⁺ in the neutral form with perchlorate as counter-ion, whereas in the other molecule, it ligates to Co²⁺ in the anionic form after deprotonation. The coordination geometry can be best described as distorted trigonal bipyramidal.

Online 3 May 2007

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