3H示踪法研究乙炔均相二聚反应的机理

STUDY ON DIMERIZATION MECHANISM OF ACETYLENE IN HOMOGENEOUS CATALYTIC SYSTEM BY MEANS OF ~3H LABELED ACETYLENE

首次采用氚标记法研究乙炔催化二聚反应机理,结果表明乙炔与Cu(Ⅰ)配位生成中间物同时,伴随乙炔分子上质子向水相转移过程.

The dimerization of acetylene in Niculand catalytic system (CuCl-NH4Cl-H2O) has been studied for the first time by means of 3H labeled acetylene at 60± 0.1℃ . Some conclusion has been obtained. The radioactive countings in the sample of catalyst reaction system are two order of magnitude higher than that of reference reaction system. The measured results of liquid scintillation indicate the protons transfer to catalytic solution from acetylene at the same of formation media for Cu(I) with acetylene. This conclusion is also applicable to the general aqueous system of coordination reaction for acetylene with Cu(I).