6-Propylamino-2,6-propylepimino-2,4,4,8,8-pentakis(pyrrolidin-1-yl)-1,3,5,7,2lambda5,4lambda5,6lambda5,8lambda5-tetraazatetraphosphorocine.

The title compound, C(26)H(55)N(11)P(4), consists of a bicyclic phosphazene ring with five bulky pyrrolidino and one propylamino group, together with a second propylamino group bridging the two P atoms. The asymmetric unit contains two molecules with very similar conformations. The bulky substituents are instrumental in determining the bicyclic P(4)N(5) ring conformation.