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Issue 34, 2012
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Formation of M4Se4 cuboids (M = As, Sb, Bi) via secondary pnictogenchalcogen interactions in the co-crystals MX3·Se[double bond, length as m-dash]P(p-FC6H4)3 (M = As, X = Br; M = Sb, X = Cl; M = Bi, X = Cl, Br)

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Abstract

The reactions of the group 15 trihalides, MX3 (M = As, Sb, Bi; X = Cl, Br), with the phosphine selenide SeP(p-FC6H4)3 result in the formation of co-crystals of formula MX3·SeP(p-FC6H4)3. No reaction was observed with MI3 (M = As, Sb, Bi). The structures of MX3·SeP(p-FC6H4)3 (M = As, X = Br 2; M = Sb, X = Cl 3; M = Bi, X = Cl 5; M = Bi, X = Br 6) have been established, and are isomorphous, crystallising in the cubic I23 space group. All the structures feature a primary MX3 unit, which has three weak secondary M⋯Se interactions to SeP(p-FC6H4)3 molecules. However, each of these SeP(p-FC6H4)3 molecules bridges three MX3 molecules, resulting in the generation of an M4Se4 (M = As, Sb, Bi) distorted cuboid linked by the pnictogenchalcogen interactions. Four opposing corners of the cuboid are occupied by the M atom (M = As, Sb, Bi) of an MX3 pyramid, and the other four by the selenium atom of the phosphine selenide.

Graphical abstract: Formation of M4Se4 cuboids (M = As, Sb, Bi) via secondary pnictogen–chalcogen interactions in the co-crystals MX3·Se [[double bond, length as m-dash]] P(p-FC6H4)3 (M = As, X = Br; M = Sb, X = Cl; M = Bi, X = Cl, Br)

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Publication details

The article was received on 09 May 2012, accepted on 22 Jun 2012 and first published on 22 Jun 2012


Article type: Paper
DOI: 10.1039/C2DT31010D
Citation: Dalton Trans., 2012,41, 10211-10218
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    Formation of M4Se4 cuboids (M = As, Sb, Bi) via secondary pnictogenchalcogen interactions in the co-crystals MX3·Se[double bond, length as m-dash]P(p-FC6H4)3 (M = As, X = Br; M = Sb, X = Cl; M = Bi, X = Cl, Br)

    F. B. Alhanash, N. A. Barnes, A. K. Brisdon, S. M. Godfrey and R. G. Pritchard, Dalton Trans., 2012, 41, 10211
    DOI: 10.1039/C2DT31010D

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