MECHANISM OF INTERACTION OF DIMETHYLGOLD(III) CHELATES VAPOR WITH HOTSURFACE

By the electron impact mass-spectrometric method, the temperature depe ndence of the gas phase structure was investigated at the thermal deco mposition of dimethylgold chelate vapour of the general formula (CH3)( 2)AuL, where L = (RC(X)CHC(Y)R'); R = CH3, C(CH3)(3); R' = CH3, C(CH3) (3), CF3; X = O, NH; Y = O, S) in vacuum and deuterium environment at temperatures up to 350 degrees C and the saturated vapour pressure by 10(-4) . 10(-2) Torr. the threshold temperature of the stability of co mlexes vapour was determined. From the temperature dependence of the r ate constant of decomposition processes the effective activation energ y was obtained It was shown that the initial act of the complexes dest raction is break of the chelate cycle. The following decomposition pro cess comlexes adcorbed at the surface lead to HL, L and CH(3)L, methah e and ethane by competitive inside- and intermolecular processes. The presence of deuterium (or hydrogen) in the reaction zone couses to dec rease onset temperatures for all investigated compounds.