@Article{CorreaSilvBarrAlbe:2017:ThStH,
author = "Correa, Eberth and Silva, Washington Barbosa da and Barreto,
Patr{\'{\i}}cia Regina Pereira and Albernaz, Alessandra F.",
affiliation = "{Universidade de Bras{\'{\i}}lia (UNB)} and Instituto Federal de
Educa{\c{c}}{\~a}o, Ci{\^e}ncia e Tecnologia de Goi{\'a}s and
{Instituto Nacional de Pesquisas Espaciais (INPE)} and
{Universidade de Bras{\'{\i}}lia (UNB)}",
title = "Theoretical study of the H + HCN \−\→ H + HNC
process",
journal = "Journal of Molecular Modeling",
year = "2017",
volume = "23",
number = "5",
month = "May",
keywords = "H + HCN reaction, Master equation method, Thermal rate constants,
Transition state theory.",
abstract = "We present a theoretical study on the detailed mechanism and
kinetics of the H + HCN \→ H + HNC process. The potential
energy surface was calculated at the complete basis set quantum
chemical method, CBS-QB3. The vibrational frequencies and
geometries for four isomers (H 2CN, cis-HCNH, trans-HCNH, CNH 2),
and seven saddle points (TSn where n = 1 \− 7) are very
important and must be considered during the process of formation
of the HNC in the reaction were calculated at the
B3LYP/6-311G(2d,d,p) level, within CBS-QB3 method. Three different
pathways (PW1, PW2, and PW3) were analyzed and the results from
the potential energy surface calculations were used to solve the
master equation. The results were employed to calculate the
thermal rate constant and pathways branching ratio of the title
reaction over the temperature range of 300 up to 3000 K. The rate
constants for reaction H + HCN \→ H + HNC were fitted by
the modified Arrhenius expressions. Our calculations indicate that
the formation of the HNC preferentially occurs via formation of
cisHCNH, the fitted expression is kPW2(T) = 9.98 ×
10\−22T2.41 exp(\−7.62 kcal.mol\−1/RT) while
the predicted overall rate constant kOverall(T) = 9.45 ×
10\−21T2.15 exp(\−8.56 kcal.mol\−1/RT) in cm3
molecule\−1s\−1.",
doi = "10.1007/s00894-017-3335-7",
url = "http://dx.doi.org/10.1007/s00894-017-3335-7",
issn = "1610-2940",
language = "en",
targetfile = "correa_theoretical.pdf",
urlaccessdate = "27 abr. 2024"
}