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Title: Theoretical study of the reaction mechanism and kinetics of the phenyl + propargyl association

Journal Article · · Physical Chemistry Chemical Physics. PCCP (Print)
DOI:https://doi.org/10.1039/d0cp00306a· OSTI ID:1766438

Potential energy surface for the phenyl + propargyl radical recombination reaction has been studied at the CCSD(T)-F12/cc-pVTZ-f12//B3LYP/6-311G** level of theory for the closed-shell singlet species and at the triplet–singlet gap CASPT2/cc-pVTZ-CCSD(T)-F12/cc-pVTZ-f12//CASSCF/cc-pVTZ level of theory for the diradical species. High-pressure limit rate constants for the barrierless channels were evaluated with variable reaction coordinate transition state theory (VRC-TST). Rice–Ramsperger–Kassel–Marcus Master Equation (RRKM-ME) calculations have been performed to assess temperature- and pressure-dependent phenomenological rate constants and product branching ratios. Here, the entrance channels of the radical association reaction produce 3-phenyl-1-propyne and phenylallene which can further dissociate/isomerize into a variety of unimolecular and bimolecular products. Theoretical evidence is presented that, at combustion relevant conditions, the phenyl + propargyl recombination provides a feasible mechanism for the addition of a second five-member ring to the first six-member aromatic ring producing the prototype two-ring species indene and indenyl. Rate expressions for all important reaction channels in a broad range of temperatures and pressures have been generated for kinetic modeling.

Research Organization:
Florida International Univ. (FIU), Miami, FL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
FG02-04ER15570
OSTI ID:
1766438
Alternate ID(s):
OSTI ID: 1605038
Journal Information:
Physical Chemistry Chemical Physics. PCCP (Print), Vol. 22, Issue 13; ISSN 1463-9076
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 22 works
Citation information provided by
Web of Science

References (33)

Unravelling combustion mechanisms through a quantitative understanding of elementary reactions journal January 2005
Simplified CCSD(T)-F12 methods: Theory and benchmarks journal February 2009
Density‐functional thermochemistry. III. The role of exact exchange journal April 1993
Communication: Extended multi-state complete active space second-order perturbation theory: Energy and nuclear gradients journal August 2011
Reaction of Phenyl Radical with Propylene as a Possible Source of Indene and Other Polycyclic Aromatic Hydrocarbons: An Ab Initio/RRKM-ME Study journal April 2012
Unimolecular Dissociations and Free Radical Recombination Reactions journal March 1952
Influences of the molecular fuel structure on combustion reactions towards soot precursors in selected alkane and alkene flames journal January 2018
Theory of thermal unimolecular reactions at low pressures. I. Solutions of the master equation journal June 1977
A comparative study on the sooting tendencies of various 1-alkene fuels in counterflow diffusion flames journal June 2018
Resonance-stabilized hydrocarbon-radical chain reactions may explain soot inception and growth journal September 2018
Multireference perturbation theory for large restricted and selected active space reference wave functions journal April 2000
Variational optimizations in the Rice–Ramsperger–Kassel–Marcus theory calculations for unimolecular dissociations with no reverse barrier journal January 1992
Molpro: a general-purpose quantum chemistry program package: Molpro
  • Werner, Hans-Joachim; Knowles, Peter J.; Knizia, Gerald
  • Wiley Interdisciplinary Reviews: Computational Molecular Science, Vol. 2, Issue 2 https://doi.org/10.1002/wcms.82
journal July 2011
A simple and efficient CCSD(T)-F12 approximation journal December 2007
Reactions between Resonance-Stabilized Radicals: Propargyl + Allyl journal April 2010
Gaussian basis sets for use in correlated molecular calculations. I. The atoms boron through neon and hydrogen journal January 1989
Association rate constants for reactions between resonance-stabilized radicals: C3H3 + C3H3, C3H3 + C3H5, and C3H5 + C3H5 journal January 2007
Mapped Interpolation Scheme for Single-Point Energy Corrections in Reaction Rate Calculations and a Critical Evaluation of Dual-Level Reaction Path Dynamics Methods journal February 1999
Self‐consistent molecular orbital methods. XX. A basis set for correlated wave functions journal January 1980
Accurate reaction paths using a Hessian based predictor–corrector integrator journal June 2004
Reformulation and Solution of the Master Equation for Multiple-Well Chemical Reactions journal May 2013
Computational study on the recombination reaction between benzyl and propargyl radicals journal January 2012
Pressure-dependent rate constants for PAH growth: formation of indene and its conversion to naphthalene journal January 2016
A new era for combustion research journal February 2019
Predictive a priori pressure-dependent kinetics journal December 2014
Variable reaction coordinate transition state theory: Analytic results and application to the C2H3+H→C2H4 reaction journal March 2003
Basis set convergence in second-row compounds. The importance of core polarization functions journal January 1998
Tunneling corrections to unimolecular rate constants, with application to formaldehyde journal November 1979
Transition states for chemical reactions I. Geometry and classical barrier height journal April 1998
The complete active space SCF (CASSCF) method in a Newton–Raphson formulation with application to the HNO molecule journal February 1981
Quantum Chemical Study of the Initial Step of Ozone Addition to the Double Bond of Ethylene journal October 2012
Theoretical Study of the Reaction Mechanism and Kinetics of the Phenyl + Allyl and Related Benzyl + Vinyl Associations journal February 2019
On the Combination Reactions of Hydrogen Atoms with Resonance-Stabilized Hydrocarbon Radicals journal May 2007

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