Synthesis, Crystal Structure and Thermal Behavior of a New Polynitrile N,N,N',N'-tetra(2-cyanoethyl)-1,4-bis(3-aminopropyl)piperazine

A new polynitrile, N,N,N',N'-tetra(2-cyanoethyl)-1,4-bis(3-aminopropyl)piperazine, was synthesized by the nucleophilic addition reaction of 1,4-bis(3-aminopropyl)piperazine and acrylonitrile for the first time. The title compound was characterized by elemental analysis, IR spectrum, and its crystal structure determined by X-ray single-crystal diffraction. The compound crystallizes in the monoclinic system with space group P2 (1)/c and a = 8.6195(12), b = 9.300(14), c = 16.221(2) , beta = 97.824(2)A degrees, V = 1288.2(3) (3), D (c) = 1.064 g cm(-3), M (r) = 412.59, Z = 2, F(000) = 448, mu = 0.067 mm(-1). The TG-DTA analysis revealed that the title compound possesses relatively good thermal stability under 220 A degrees C.