Crystal Structure of 18,19-Dihydro-8,8-dipyrrolidine-1-yl-6λ⁵, 8λ⁵, 10λ⁵-6,10-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, β = 98.575(5)°.