Received 23 November 2012
In the title compound, C30H48BNOP2·0.5H2O, the water molecule is disordered about an inversion centre. Both phosphorus atoms shows distortions in their tetrahedral environments with the cyclohexyl substituents disordered over two orientations in a 0.851 (3):0.149 (3) occupancy ratio. The crystal structure is assembled via O-HO interactions between pairs of phosphininc amide molecules and water molecules, creating hydrogen-bonded dimers with graph-set R24(8) along . Weak C-HO interactions are also observed.
For background to the synthesis of ligands derived from phosphinic amides, see: Williams et al. (2009). For background to DoM technology, see: Snieckus (1990). For details of cone angles, see: Tolman (1977); Otto (2001). For graph-set notation, see: Bernstein et al. (1995).
Data collection: APEX2 (Bruker, 2005); cell refinement: SAINT-Plus (Bruker, 2004); data reduction: SAINT-Plus and XPREP (Bruker, 2004); program(s) used to solve structure: SIR97 (Altomare et al., 1999); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: DIAMOND (Brandenburg & Putz, 2005); software used to prepare material for publication: publCIF (Westrip, 2010) and WinGX (Farrugia, 2012).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: ZQ2191 ).
The University of the Free State is thanked for the use of their diffractometer. Financial assistance from Sasol, THRIP and the Research Fund of the University of Johannesburg is gratefully acknowledged.
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