Crystal structure of 18,19-dihydro-8,8-dipyrrolidine-1-yl-6?5, 8?5, 10?5-6,10-nitrilo-16H, 21H-[1,3,5,7,2,4,6]tetraazatriphosphonino[2,1-b:6,7-b?]bis-[1,3,2] benzoxazaphosphorine

Abstract

The title compound, C24H32N7O2P3, a cyclotriphosphazene, has a spiro-ansa-spiro architecture, in which the bicyclic system resembles the stable "adamantane" structure. Two N and two P atoms are capable of representing stereogenic centres (meso form). It belongs to the space group P21/c with cell parameters a = 10.6133(7), b = 9.3246(4), c = 26.6523(18)Å, ? = 98.575(5)°. 2007 © The Japan Society for Analytical Chemistry.