A New organic-Cation Cyclotetraphosphate C_(10)H_(28)N_4P_4O_(12).4H_2O: Crystal Structure, Thermal Analysis, and Vibrationial Spectra

摘要

Anew organic-cation phosphate of C_(10)H_(28)N_4P_4O_(12). 4H_2O has been obtained. The crystal structure determination shows that this compound crystallizes in the triclinic system, space group P-1, with the following unit cell parameters: a = 9.147(3) A; b = 9.258(3) A; c = 8.974(3) A; #alpha# = 79.92(3); #beta# = 117.41(3); #gamma# = 116.58(3)0. P_4O_(12) cycles, which present the strongest distortion in this kind of materials, are connected through O_w-H-0-P hydrogen bonds, so that bidimensionallayers parallel to the ab plane are formed. These layers are themselves interconnected by means N-H-o-P hydrogen bonds origin- ating from the (C_(10)H_(28)N_4)~(4+) cations forming a three-dimensional network. The hydrated character of this phosphate is confirmed by the coupled TG-DTA thermal study which shows the success- ive loss of water molecules. The molecular arrangement within the structure has been confirmed by the IR spectroscopy.