Cyclophosphazene supramolecular assemblies: N–H⋯N and C–H⋯N mediated supramolecular networks in the crystal structures of N3P3[N(Me)NH2]6 and spiro-N3P3[O2C12H8][N(Me)NH2]4

Abstract

Cyclophosphazene hydrazides, N₃P₃[N(Me)NH₂]₆1 and spiro-N₃P₃[O₂C₁₂H₈][N(Me)NH₂]₄2 have been found to organize themselves in supramolecular assemblies in the solid state. Thus, 1 forms a hexagonal close-packed sheet in which each molecule interacts with its six nearest neighbors. All the three ring nitrogen atoms act as proton acceptors while one N(Me)NH₂ substituent on each phosphorus atom acts as a proton donor. Compound 2 forms a double chain in which two ring nitrogen atoms act as proton acceptors and one N(Me)NH₂ substituent of each phosphorus atom acts as a proton donor. The supramolecular assembly of 1 is further elaborated by intermolecular C–H⋯N interactions.