Acta Crystallographica Section C

Crystal Structure Communications

Volume 61, Part 4 (April 2005)

metal-organic compounds

sk1821 scheme

Acta Cryst. (2005). C61, m211-m214 [doi:10.1107/S0108270105006323]

Di--halogeno-bis[halogeno(triphenylphosphine)mercury(II)], [Ph₃PHgX(-X)₂XHgPPh₃], reinvestigated at 120 K for X = Cl and Br, and a second polymorph for X = I, also at 120 K

M. B. Mariyatra, K. Panchanatheswaran, J. N. Low and C. Glidewell

Abstract: Di- [bold mu] -chloro-bis[chloro(triphenylphosphine)mercury(II)], [Hg₂Cl₄(C₁₈H₁₅P)₂], (I), and di--bromo-bis[bromo(triphenylphosphine)mercury(II)], [Hg₂Br₄(C₁₈H₁₅P)₂], (II), have been reinvestigated at 120 K. The molecules of (I) lie across inversion centres in space group P2₁/n, and in both (I) and (II) the complexes are linked into three-dimensional frameworks by a combination of C-HX (X = Cl and Br) and C-H [bold pi] (arene) hydrogen bonds. At 120 K, di- [bold mu] -iodo-bis[iodo(triphenylphosphine)mercury(II)], [Hg₂I₄(C₁₈H₁₅P)₂], (III), crystallizes as a new polymorphic form having Z' = ${1\over 2}$ , where the complexes lie across inversion centres in space group P2₁/n; the complexes are linked into sheets by a combination of C-HI and C-H [bold pi] (arene) hydrogen bonds. In the Z' = 1 polymorph of this compound, a single C-HI hydrogen bond generates simple chains.

Formula: [Hg₂Cl₄(C₁₈H₁₅P)₂] and [Hg₂I₄(C₁₈H₁₅P)₂]


	Structure factor file (CIF format) (204.0 kbytes) Contains datablock I

	Structure factor file (CIF format) (221.3 kbytes) Contains datablock III

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