6‐Propylamino‐2,6‐propylepimino‐2,4,4,8,8‐pentakis(pyrrolidin‐1‐yl)‐1,3,5,7,2λ5,4λ5,6λ5,8λ5‐tetraazatetraphosphorocine

The title compound, C₂₆H₅₅N₁₁P₄, 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 P₄N₅ ring conformation. Each of the fused six‐membered N₃P₃ rings is in a sofa conformation. The P—N distances in the bridge are non‐equivalent and one of them is the longest P—N bond in the mol­ecule. The hybridization of the bridging N atom is pyramidal. The single and double P—N bonds cannot easily be distinguished, since they retain their phosphazenic character in the phosphazene macro‐rings.