Hydrothermal synthesis and characterization of a new indium phosphite [In4(HPO3)7(H2O)3] (NH3CH2CH2NH3) (H2O) with intersecting twelve-membered ring channels

A new three-dimensional indium phosphite, [ In-4 ( HPO3) (7) ( H2O)(3) ] ( NH3 CH2 CH2 NH3) ( H2O), was synthesized under hydrothermal conditions in the system containing HF using ethylenediamine as the template and characterized by IR spectroscopy, TG, ICP and C, H, N elemental analysis. The result of single-crystal X-ray diffraction analysis reveals that the title compound crystallized in trigonal system, space group P3 with unit cell parameters a = 1. 37883 ( 7) nm, c = 0. 93450 (9) nm, V = 1. 53862 ( 2) nm(3) ,Z= 2, D-c = 2. 489 Mg/m(3) ,R-1 [ I > 2 sigma, (I)] = 0. 0526, wR(2) [ I > 2 sigma ( I)] = 0. 1328, GOF = 1. 082. Its structure is built up from shared vertex linking InO6, InO5 ( H2O) octahedral and HPO3 pseudo-pyramidal units by O atoms, forming intersecting twelve-membered ring channels along a and b axes directions. Guest water and dipronto nated ethylenediamine molecules exist in the channels.