The M(C2H2) molecule isomerized to the alkynyl hydride HMCCH isomer upon UV-visible irradiation.This isomerization process was predicted to be exothermic but require activation energy.

• 该M(C2H2)分子在紫外-可见光激发下进一步发生重排反应，生成炔基氢化物HMCCH，该反应是一个吸热反应并需要活化能。