SYNTHESIS, CRYSTAL-STRUCTURE, AND PROPERT IES OF NO-1-THIO-1-LAMBDA(5),3-LAMBDA(5)-DIPHOSPHAZ-2-ENE (NH2)(2)P(S)N=P(NH2)(3)

(NH2)(2)P(S)N=P(NH2)(3) has been prepared by a two step synthesis. Sui table single crystals were obtained from an acetonitrile solution in a temperature gradient between 60 degrees C and room temperature. The c rystal structure of (NH2)(2)P(S)N=P(NH2)(3) has been determined by sin gle crystal X-ray methods (P2(1)/c, a = 998.27(9), b = 762.78(8), c = 1007.70(15) pm, beta = 107.340(7)degrees, Z = 4). In the crystal struc ture each hydrogen atom is subject to a hydrogen bond. Four N-H ... N hydrogen bonding interactions per molecule build up a framework connec ting two molecules in eight-membered rings. Each sulfur atom shows six distances N-H ... S in the range of weak hydrogen bonding interaction s.