Received 8 October 2012
The CuI atom in the title compund, [Cu(C7H2Br3O2)(C19H17P)2], is located on a twofold rotation axis; the 3,5,7-tribromotropolonate anion coordinates as a bidentate ligand with a bite angle of 76.42 (9)°. An intramolecular C-HO interaction occurs. Within the crystal, extensive weak C-H interactions contribute to the herringbone pattern observed in the packing of the molecules.
For background to tropolone and its derivatives, see: Dewar (1945); Hill & Steyl (2008); Crous et al. (2005). For bis-troplolonato-copper(II) complexes, see: Chipperfield et al. (1998); Hasegawa et al. (1997); Ho (2010); Ho et al. (2009). For work on the effect the troplonato ligand has on the solid state and chemical behaviour of copper(I) phosphine metal complexes, see: Roodt et al. (2003); Steyl (2007, 2009); Steyl & Hill (2009); Steyl & Roodt (2006).
Data collection: APEX2 (Bruker, 2005); cell refinement: SAINT-Plus (Bruker, 2004); data reduction: SAINT-Plus; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: DIAMOND (Brandenburg & Putz, 2005); software used to prepare material for publication: WinGX (Farrugia, 1999).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: NG5299 ).
Professors G. Steyland and A. Roodt, University of the Free State, and Mr Renier Koen are thanked for the data collection. Financial assistance from the University of the Free State Strategic Academic Cluster Initiative, SASOL, the South African NationalResearch Foundation (SA-NRF/THRIP) and the Inkaba yeAfrika Research Initiative is gratefully acknowledged. Part of this material is based on work supported by the SA-NRF/THRIP under grant No. GUN 2068915. Opinions, findings,conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the SA-NRF.
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