(IUCr) Crystallography Journals Online

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Acta Cryst. (2003). E59, m345-m347 [ doi:10.1107/S1600536803009991 ]

Triguanidinium hexahydrogenhexamolybdocobaltate(III) tetrahydrate

U. Lee, S.-J. Jang, H.-C. Joo and K.-M. Park

Abstract: Crystals of the title compound, (CH₆N₃)₃[H₆CoMo₆O₂₄]·4H₂O, containing the well known B-type Anderson-Evans heteropolyoxometalate structure, were obtained by recrystallization of powder (CH₆N₃)₃[H₆CoMo₆O₂₄]·nH₂O. The anion has a Co^III atom at an inversion center and has approximate $\overline 3$ symmetry, with Co-O bond lengths in the range 1.905 (3)-1.918 (3) Å and Mo-O bond lengths in the ranges 1.704 (3)-1.722 (3) (Ot), 1.915 (3)-1.949 (3) (Ob), and 2.266 (3)-2.312 (3) Å (Oc), respectively.

Online 16 May 2003