Acta Cryst. (2009). E65, m503  [ doi:10.1107/S160053680901280X ]

Bis(guanidinium) tetraiodidomercurate(II)

H. Terao, T. M. Gesing, H. Ishihara, Y. Furukawa and B. T. Gowda

Abstract: The Hg atom in the crystal structure of the title compound, (CH₆N₃)₂[HgI₄], is tetrahedrally coordinated by four I atoms. The [HgI₄]^2- ions are interconnected to the [C(NH₂)₃]⁺ ions by N-HI hydrogen bonds, forming a three-dimensional network. The four different observed Hg-I distances [2.760 (2), 2.7762 (15), 2.8098 (14) and 2.833 (2) Å] are consistent with four different ¹²⁷I NQR frequencies observed, showing the existence of four unique I atoms in the tetraiodidomercurate unit.

Online 10 April 2009

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