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P(O)[O]2[N], 3 P(S)[N]3 4 and P(S)[O]2[N] 4 segments. We report here on the title structure (with a [C]2P[O] [O] segment), Fig. 1. For the synthesis of the title compound, a solution of (C6H5CH2)2NH (8 mmol) in CHCl3 (10 ml) was added to a solution of (C6H5)2P(O)Cl (4 mmol) in the same solvent (10 ml) at ice-bath temperature. After stirring for 4 h, and allowing the mixture to come to room temperature within the procedure, the solid that formed was filtered off. The filtered solution was evaporated in vacuo to obtain a crude product as a solid, which was washed with distilled water. Single crystals suitable for X-ray crystallography were obtained from a solution of the product in CHCl3 by slow evaporation at room temperature. IR (KBr, cm –1 ): 3465, 3059, 2984, 2902, 2790, 2397, 1641, 1591, 1496, 1485, 1453, 1439, 1391, 1364, 1308, 1227, 1130, 1115, 1032, 998, 951, 848, 786, 751, 730, 697, 561, 534, 487. The crystallographic data are summarized in Table 1, and selected bond lengths and angles are given in Table 2. The asymmetric unit of the title hydrated salt is composed of one [(C6H5CH2)2NH2] + cation, one [(C6H5)2P(O)(O)] – anion and one solvent water molecule (Fig. 2). In general, all bond distances are within the values characteristic according the atoms involved. The P– O bond lengths of anion (P1– O1 1.5145(17)A, P1– O2 1.5175(16)A) are relatively similar (due to the delocalization of negative charge over two oxygen atoms), similar to such bonds for a previously reported structure [(C2H5)2NH2][(C6H5)2P(O)(O)]. 6 In the cation, the C19– N1– C20

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Synthesis and Crystal Structure of a New Hydrated Phosphinate Salt, [(C&lt;sub&gt;6&lt;/sub&gt;H&lt;sub&gt;5&lt;/sub&gt;CH&lt;sub&gt;2&lt;/sub&gt;)&lt;sub&gt;2&lt;/sub&gt;NH&lt;sub&gt;2&lt;/sub&gt;][(C&lt;sub&gt;6&lt;/sub&gt;H&lt;sub&gt;5&lt;/sub&gt;)&lt;sub&gt;2&lt;/sub&gt;P(O)(O)]&amp;middot;H&lt;sub&gt;2&lt;/sub&gt;O