The α-cyclohexanedione(α-CHD) molecule is an important structural unit in the six-membered ring systems with a large number of biologically meaningful molecules which have been found. It has important applications in synthetic science also. It is found that some fragments can be obtained through vacuum ultraviolet absorption spectrum and induction photolysis experiments for α-CHD molecules. In order to understand the dissociation reaction mechanism of α-CHD and reveal the resource of those fragments, the po...