(IUCr) Crystallography Journals Online

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Acta Cryst. (2005). E61, m2006-m2007 [ doi:10.1107/S1600536805028254 ]

A low-temperature investigation of trans-diiodotetrakis(tetrahydrofuran)calcium(II)

K. W. Henderson, J. A. Rood and B. C. Noll

Abstract: The asymmetric unit of the title compound, [CaI₂(C₄H₈O)₄], at 100 K comprises half each of two independent molecules, each of which is located on a center of inversion, and in each of these, the central Ca atom is bound by two trans I atoms and four tetrahydrofuran molecules to give a distorted octahedral geometry. This compound undergoes a phase change on cooling from room temperature to 100 K, altering the space group from monoclinic P2₁/c to triclinic P $\\overline{1}$ . This change is also accompanied by a reduction in the positional disorder of the coordinated tetrahydrofuran molecules.

Online 17 September 2005