WANG Rongjie, SHEN Benxian, MA Jian, et al. Ring-open reaction mechanism of sulfur S8 based on density functional theory[J]. CIESC Journal, 2015, (10): 3919-3924. DOI: 10.11949/j.issn.0438-1157.20150274.
WANG Rongjie, SHEN Benxian, MA Jian, et al. Ring-open reaction mechanism of sulfur S8 based on density functional theory[J]. CIESC Journal, 2015, (10): 3919-3924. DOI: 10.11949/j.issn.0438-1157.20150274.DOI:
Quantum chemical method based on density functional theory (DFT) was used to study the ring-open reaction mechanism of sulfur during the preparation of insoluble sulfur by gasification method. The probable reaction path was built. By the transition state theory
the activation energy and reaction rate constant were calculated for each elementary reaction. The kinetics of each elementary reaction was calculated to determine the product composition of sulfur ring-open reaction. As the result showed that the ring-open reaction of S8 generated ·S2· and ·S6· preferentially
the reaction barrier was about 209.45 kJ·mol-1. The main product of S8 ring-open reaction were ·S2·
·S4· and ·S6·. The calculated values were in agreement with the experiment results based on steam density method. The result provided reference for the study of molecular structure and polymerization mechanism of insoluble sulfur.