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 te mperatures up to 350 degrees C and the saturated vapour pressure by 10 (-4) - 10(-2) Torr. The threshold temperature of the stability of coml exes vapour was determined From the temperature dependence of the rate constant of decomposition processes the effective activation energy w as obtained It was shown that the initial act of the complexes destrac tion is break of the chelate cycle. The following decomposition proces s comlexes adcorbed at the surface lead to HL, L and CH(3)L, methahe a nd ethane by competitive inside- and intermolecular processes. The pre sence of deuterium (or hydrogen) in the reaction zone couses to decrea se onset temperatures for ail investigated compounds.