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- W2770578258 abstract "The unimolecular dissociation rate constants of ethylene glycol were examined using the MP2/6-311[Formula: see text]G(d,p) method based on the Rice–Ramsperger–Kassel–Marcus (RRKM) theory. The effect of anharmonicity on the dissociation rate constants was evaluated at 500–4000[Formula: see text]K temperatures of the canonical system and 25,182–50,235[Formula: see text]cm[Formula: see text] total energies of the microcanonical system. The comparison of the results showed that the H 2 O elimination reaction played a critical role in the decomposition processes of ethylene glycol. The results of the rate constant calculations indicated that the H 2 O elimination reaction dominated at low temperatures, whereas the direct C–C bond dissociation reaction (CH 2 OHCH 2 OH [Formula: see text] CH 2 OH[Formula: see text][Formula: see text][Formula: see text]CH 2 OH) dominated at high temperatures. For channel 1, CH 2 OH[Formula: see text][Formula: see text][Formula: see text]CH 2 OH, the anharmonic effect of the canonical system was not observed, while it became more obvious with the increasing total energies in the microcanonical system. For channels 2–5, CH 3 CHO[Formula: see text][Formula: see text][Formula: see text]H 2 O, CH 2 CHOH[Formula: see text][Formula: see text][Formula: see text]H 2 O, CH 3 OH[Formula: see text][Formula: see text][Formula: see text]CHOH, and CH 2 OHCHO[Formula: see text][Formula: see text][Formula: see text]H 2 , the anharmonic effect of canonical and microcanonical systems became more obvious with increasing temperatures and total energies. The comparison showed that, for channels 1 and 4, C–C bond dissociation and the anharmonic effect of the microcanonical system were more evident, whereas the anharmonic effect of the canonical system was more predominant for channels 2 (CH 3 CHO[Formula: see text][Formula: see text][Formula: see text]H 2 O), 3 (CH 2 CHOH[Formula: see text][Formula: see text][Formula: see text]H 2 O), and 5 (CH 2 OHCHO[Formula: see text][Formula: see text][Formula: see text]H 2 )." @default.
- W2770578258 created "2017-12-04" @default.
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- W2770578258 date "2017-12-01" @default.
- W2770578258 modified "2023-09-25" @default.
- W2770578258 title "Calculation of anharmonic effect on the dissociation of ethylene glycol" @default.
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- W2770578258 doi "https://doi.org/10.1142/s0219633617500778" @default.
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