Received 31 March 2011
The asymmetric unit of the title compound, C19H18NO3P, contains two independent molecules in which the P atoms are found in slightly distorted tetrahedral environments. In the crystal, pairs of intermolecular N-HO(P) hydrogen bonds form two independent centrosymmetric dimers.
Data collection: SMART (Bruker, 1998); cell refinement: SAINT-Plus (Bruker, 1998); data reduction: SAINT-Plus; program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL; molecular graphics: Mercury (Macrae et al., 2008); software used to prepare material for publication: SHELXTL and enCIFer (Allen et al., 2004).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: LH5229 ).
Support of this investigation by Zanjan Branch, Islamic Azad University, is gratefully acknowledged.
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