Acta Cryst. (2009). E65, i79-i80  [ doi:10.1107/S1600536809039336 ]

Tetrapotassium heptacyanidomolybdate(III) dihydrate

K. Nakabayashi, K. Tomono, Y. Tsunobuchi, W. Kosaka and S. Ohkoshi

Abstract: The asymmetric unit of the title compound, K^I₄[Mo^III(CN)₇]·2H₂O, consists of one [Mo(CN)₇]^4- anion, four K⁺ cations, and two water molecules. The [Mo^III(CN)₇]^4- anion has a seven-coordinated capped-trigonal-prismatic coordination geometry. The site-occupancy factors of the disordered water molecules were set at 0.90, 0.60 and 0.50. The H-atom positions could not be determined for two of the water molecules. The H atoms of the water with a site-occupancy factor of 0.90 were refined using O-H and HH distance restraints.

Online 17 October 2009

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