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对草酰氯分子的多键解离方式进行了理论和实验的研究。计算表明，草酰氯的第一电子激发态增强了C－C键而削弱了C－Cl键，解离出Cl原子和ClCOCO自由基。在351nm光解实验中观察到中间物ClCOCO的红外发光，该中间物很容易进一步热解为ClCO和CO，势垒仅为0．4eV。第二电子激发态形成C－C较强的反键轨道，造成C－C键的解离而产生ClCO，在248nm光解实验中，产生了振转激发的终产物CO。以瞬态模型分析了CO的振转内能分配，与实验值吻合。
The multi-bond dissociation of oxalyl chloride molecule was studied theoretically and experimentally. Calculations show that the first electron excited state of oxalyl chloride enhances the C-C bond and weakens the C-Cl bond, dissociating the Cl atom and the ClCOCO radical. The infrared luminescence of the intermediate ClCOCO was observed in the 351 nm photolysis experiment. The intermediate was easily further pyrolyzed to ClCO and CO with a potential barrier of only 0.4 eV. The second electron-excited state formed strong C-C antibonding orbital, resulting in the dissociation of C-C bond to generate ClCO. In the 248 nm photolysis experiment, the end product CO of vibration excitation was generated. The transient internal energy distribution of CO is analyzed by transient model, which is consistent with the experimental data.