Experimental and density functional theory studies on 1,1,1,4,4,4-Hexafluoro-2-butene pyrolysis

Author: Tao, N., Liu, C. C., Xing, H. R., Lu, S., Lo, S. M., Zhang, H. P.

Journal: Molecules

Keywords: HFO-1336mzz(Z), thermal decomposition, DFT, GC-MS, gas-phase reactions, main-group thermochemistry, thermal-decomposition, oh radicals, molecular-dynamics, mechanism, hfo-1336mzz(z), kinetics, alternatives, hfc-245fa, Biochemistry & Molecular Biology, Chemistry

Abstract:

A series of thermal decomposition experiments were conducted over a temperature range of 873-1073 K to evaluate the thermal stability of 1,1,1,4,4,4-hexafluoro-2-butene (HFO-1336mzz(Z)) and the production of hydrogen fluoride (HF). According to the detected products and experimental phenomena, the thermal decomposition of HFO-1336mzz(Z) could be divided into three stages. Our experimental results showed that HF concentration gradually increased with the elevation of thermal decomposition temperature. In this present study, a total of seven chemical reaction pathways of HFO-1336mzz(Z) pyrolysis were proposed to explore the generated mechanism on products through density functional theory (DFT) with M06-2X/6-311++(d,p) level theory. The thermal decomposition mechanism of pure HFO-1336mzz(Z) was discussed and the possible formation pathways of HF and other main products were proposed.