Ab initio and experimental studies on dibenzothiazyl-disulfide

作者：Jian Fang Fang^*; Zhang Ke Jie; Zhao Pu Su; Zheng Jian

来源：Bulletin of the Korean Chemical Society, 2006, 27(7): 1048-1052.

• ab initio calculation
• vibrational frequency
• electronic spectroscopy
• thermodynamic calculation

Ab initio calculations of the structure, atomic charges and natural bond orbital (NBO) have been performed at HF/6-311G** and B3LYP/6-311G** levels for the title compound of dibenzothiazyl-disulfide. The calculated results show that the two nitrogen atoms have the biggest negative charges and they are the potential sites to react with the metallic ions, which make the title compound become a di-dentate ligand. Vibrational frequencies of the title compound have been obtained and compared with the experimental value and the comparison indicates that B3LYP/6-311G** level is better than HF/6-311G** level to predict the vibrational frequencies for the system studied here. For the title compound, electronic absorption spectra calculated by time-dependent density functional theory (TD-DFT) are more accurate than Hartree-Fock single-excitation Cl (CI-Singles) method. NBO analyses show that the electronic transitions are mainly derived from the contribution of bands pi-->pi*. Thermodynamic calculated results show that the formation of the title compound from 2-mercaptobenzothiazole is a spontaneous process at room temperature With the change of free Gibbs being negative value.

• 出版日期2006-7-20
• 单位青岛大学