Synthesis and Crystal Structure of a New Hydrated Phosphinate Salt, [(C6H5CH2)2NH2][(C6H5)2P(O)(O)]·H2O

摘要

The asymmetric unit of the title hydrated salt contains one [(C₆H₅CH₂)₂NH₂]+ cation, one [(C₆H₅)₂P(O)(O)]- anion and one solvent water molecule. In the anion, the P atom is in a distorted tetrahedral [C]₂P[O][O] environment with the highest angle of 116.38(9)° for the O-P-O angle and the lowest angle of 102.74(10)° for the C-P-C angle. The most characteristic feature of the cation is the open C-N-C angle (of 113.50(17)°). In the crystal structure, the cations, anions and water molecules are hydrogen-bonded to each other, through O-H…O (O…O = 2.904(3)Å and 2.921(2)Å) and N-H…O (N…O = 2.731(2)Å and 2.766(3)Å) hydrogen bonds, building a linear arrangement along the b axis. In this hydrogen-bond pattern, the PO groups act as a double hydrogen-bond acceptor.