Acetamide-ammonium sulfamate

Abstract

Molten mixtures of acetamide and ammonium sulfamate (indicated here AS) are reacted at mole fraction XAs < 0.35 to produce (NH4)2SO4 and CH3CN. The experimental conditions and analytical methods adopted are given and a kinetic mechanism is proposed.For several years we have been studying the particular properties of molten mixtures of amides and electrolytes [1][2][3][4][5][6][7][8][9][10]. In some cases they show polymeric structures which are reponsible for supercooling phenomena and for a very high dielectric constant [11][12][13][14][15]. With the aim of clarifying the chemical conditions where this type of phenomena oeeurs, we studied the liquid-solid equilibrium temperatures, in binary mixtures, amide + electrolytes; of these systems the acetamide + ammonium sulfamate mixture showed reactive properties. ExperimentalThe cryoscopic method employed is reported elsewhere [16]: it consists of a potentiometrie measurements of temperature (via a ehromel-alumel thermocouple, calibrated against a Pt thermometer). NMR measurements were performed by means of a Varian XL-300. The chemicals employed were: acetamide Fluka AG, Buchs SG purum ammonium sulfamate Fisher Scientific Company certified. They were dried under dynamic vacuum for several days before use.

Sulfamic Acid and Its N- and O-Substituted Derivatives

“…Aminotriazine sulfamate is used in a complex mixture to give an effective fire-resistant material, and the sulfamate phosphazene, R 1 (O) 3 PNSO 3 R 1 , R 1 = ether-containing C 1–10 alkyl, haloalkyl, is used as a flame retardant in battery electrolytes . Hydrolysis of guanidine sulfamate gives guanidine ammonium sulfate and molten mixtures of acetamide–ammonium sulfamate give ammonium sulfate and acetonitrile …”