DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: A combined experimental and computational study on the reaction dynamics of the 1-propynyl radical (CH3CC; X2A1) with ethylene (H2CCH2; X1A1g) and the formation of 1-penten-3-yne (CH2CHCCCH3; X1 A')

Journal Article · · Physical Chemistry Chemical Physics. PCCP
DOI: https://doi.org/10.1039/c9cp04073k · OSTI ID:1603228
 [1];  [2]; ORCiD logo [3];  [4]; ORCiD logo [4]; ORCiD logo [2]
  1. Univ. of Hawaii at Manoa, Honolulu, HI (United States). Dept. of Chemistry; University of Hawaii at Manoa
  2. Univ. of Hawaii at Manoa, Honolulu, HI (United States). Dept. of Chemistry
  3. Department of Chemistry; University of Hawai’i at Manoa; Honolulu; USA
  4. Florida International Univ., Miami, FL (United States). Dept. of Chemistry and Biochemistry; Samara National Research Univ. (Russia)

The crossed molecular beam reactions of the 1-propynyl radical (CH3CC; X2A1) with ethylene (H2CCH2; X1A1g) and ethylene-d4 (D2CCD2; X1A1g) were performed at collision energies of 31 kJ mol₋1 under single collision conditions. Combining our laboratory data with ab initio electronic structure and statistical Rice–Ramsperger–Kassel–Marcus (RRKM) calculations, we reveal in this work that the reaction is initiated by the barrierless addition of the 1-propynyl radical to the π-electron density of the unsaturated hydrocarbon of ethylene leading to a doublet C5H7 intermediate(s) with a life time(s) longer than the rotation period(s). The reaction eventually produces 1-penten-3-yne (p1) plus a hydrogen atom with an overall reaction exoergicity of 111 ± 16 kJ mol₋1. About 35% of p1 originates from the initial collision complex followed by C–H bond rupture via a tight exit transition state located 22 kJ mol₋1 above the separated products. The collision complex (i1) can also undergo a [1,2] hydrogen atom shift to the CH3CHCCCH3 intermediate (i2) prior to a hydrogen atom release; RRKM calculations suggest that this pathway contributes to about 65% of p1. In higher density environments such as in combustion flames and circumstellar envelopes of carbon stars close to the central star, 1-penten-3-yne (p1) may eventually form the cyclopentadiene (c-C5H6) isomer via hydrogen atom assisted isomerization followed by hydrogen abstraction to the cyclopentadienyl radical (c-C5H5) as an important pathway to key precursors to polycyclic aromatic hydrocarbons (PAHs) and to carbonaceous nanoparticles.

Research Organization:
Florida International Univ., Miami, FL (United States); Univ. of Hawaii, Honolulu, HI (United States)
Sponsoring Organization:
Russian Ministry of Science and Higher Education; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
FG02-03ER15411; FG02-04ER15570
OSTI ID:
1603228
Journal Information:
Physical Chemistry Chemical Physics. PCCP, Journal Name: Physical Chemistry Chemical Physics. PCCP Journal Issue: 40 Vol. 21; ISSN 1463-9076; ISSN PPCPFQ
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English

References (118)

Ab initio group contribution method for activation energies for radical additions journal January 2004
Hydrogen Abstraction/Acetylene Addition Revealed journal June 2014
Unexpected Chemistry from the Reaction of Naphthyl and Acetylene at Combustion-Like Temperatures journal March 2015
HACA's Heritage: A Free-Radical Pathway to Phenanthrene in Circumstellar Envelopes of Asymptotic Giant Branch Stars journal March 2017
Hydrogen Abstraction/Acetylene Addition Revealed journal June 2014
Unexpected Chemistry from the Reaction of Naphthyl and Acetylene at Combustion-Like Temperatures journal March 2015
HACA's Heritage: A Free-Radical Pathway to Phenanthrene in Circumstellar Envelopes of Asymptotic Giant Branch Stars journal March 2017
Gas‐Phase Synthesis of Triphenylene (C 18 H 12 ) journal February 2019
Gas‐Phase Synthesis of Triphenylene (C 18 H 12 ) journal March 2019
Theoretical and kinetic study of reaction C2H + C3H6 on the C5H7 potential energy surface journal November 2014
Soot Formation in Combustion Processes (Review) journal November 2005
Interstellar grains in meteorites: III. Graphite and its noble gases journal April 1995
Aromatic and Polycyclic Aromatic Hydrocarbon Formation in a Laminar Premixed n-Butane Flame journal July 1998
Kinetic modeling of soot formation with detailed chemistry and physics: laminar premixed flames of C2 hydrocarbons journal April 2000
Isotopic evidence from an Antarctic carbonaceous chondrite for two reaction pathways of extraterrestrial PAH formation journal December 2000
Titan’s atmosphere from ISO mid-infrared spectroscopy journal February 2003
Laboratory investigation on the formation of unsaturated nitriles in Titan’s atmosphere journal April 2000
Reactions of ethynyl radicals as a source of C4 and C5 hydrocarbons in Titan's atmosphere journal June 2002
Detailed modeling of soot particle nucleation and growth journal January 1991
Composition profiles and reaction mechanisms in a near-sooting premixed benzene/oxygen/argon flame journal January 1981
Reaction mechanisms in aromatic hydrocarbon formation involving the C5H5 cyclopentadienyl moiety journal January 1996
Spectroscopic properties of polycyclic aromatic hydrocarbons (PAHs) and astrophysical implications journal January 1997
Formation of polycyclic aromatic hydrocarbons and their growth to soot—a review of chemical reaction pathways journal August 2000
Identification of combustion intermediates in isomeric fuel-rich premixed butanol–oxygen flames at low pressure journal March 2007
A reaction mechanism for gasoline surrogate fuels for large polycyclic aromatic hydrocarbons journal February 2012
An experimental and kinetic modeling study of cyclopentadiene pyrolysis: First growth of polycyclic aromatic hydrocarbons journal November 2014
Compositional effects on PAH and soot formation in counterflow diffusion flames of gasoline surrogate fuels journal April 2017
A crossed beam and ab initio study of the C2(X1Σg+ /a3∏u)+C2H2(X1Σg+) reactions journal November 2003
A review of airborne polycyclic aromatic hydrocarbons (PAHs) and their human health effects journal October 2013
Identification of C4H5, C4H4, C3H3 and CH3 radicals produced from the reaction of atomic carbon with propene: Implications for the atmospheres of Titan and giant planets and for the interstellar medium journal January 2013
Assessing relative contributions of PAHs to soot mass by reversible heterogeneous nucleation and condensation journal January 2017
Temperature- and pressure-dependent rate coefficients for the HACA pathways from benzene to naphthalene journal January 2017
Isomer discrimination of polycyclic aromatic hydrocarbons in the Murchison meteorite by resonant ionization journal December 2008
Molecular Reaction Dynamics book January 2005
Formation Mechanisms of Naphthalene and Indene: From the Interstellar Medium to Combustion Flames journal January 2017
A Combined Experimental and Computational Study on the Reaction Dynamics of the 1-Propynyl (CH 3 CC)–Acetylene (HCCH) System and the Formation of Methyldiacetylene (CH 3 CCCCH) journal July 2018
Elucidating the Chemical Dynamics of the Elementary Reactions of the 1-Propynyl Radical (CH 3 CC; X 2 A 1 ) with Methylacetylene (H 3 CCCH; X 1 A 1 ) and Allene (H 2 CCCH 2 ; X 1 A 1 ) journal June 2019
Time- and Isomer-Resolved Measurements of Sequential Addition of Acetylene to the Propargyl Radical journal September 2015
VUV Photoionization Study of the Formation of the Simplest Polycyclic Aromatic Hydrocarbon: Naphthalene (C 10 H 8 ) journal May 2018
Reaction Dynamics of Phenyl Radicals in Extreme Environments: A Crossed Molecular Beam Study journal February 2009
Mechanism of Fullerene Formation journal January 1996
Prediction of Reaction Barriers and Thermochemical Properties with Explicitly Correlated Coupled-Cluster Methods: A Basis Set Assessment journal August 2012
Proposed fullerene precursor corannulene identified in flames both in the presence and absence of fullerene production journal December 1993
Reaction of Phenyl Radicals with Propyne journal February 2002
Photoinduced Mechanism of Formation and Growth of Polycyclic Aromatic Hydrocarbons in Low-Temperature Environments via Successive Ethynyl Radical Additions journal October 2008
A Theoretical Investigation of the Triplet Carbon Atom C( 3 P) + Vinyl Radical C 2 H 3 ( 2 A‘) Reaction and Thermochemistry of C 3 H n ( n = 1−4) Species journal April 2001
Formation of Three C 4 H 3 N Isomers from the Reaction of CN (X 2 Σ + ) with Allene, H 2 CCCH 2 (X 1 A 1 ), and Methylacetylene, CH 3 CCH (X 1 A 1 ):  A Combined Crossed Beam and Ab Initio Study journal May 2002
A Combined Crossed Molecular Beam and ab Initio Study of the Reactions C 2 (X 1g + , a 3 Π u ) + C 2 H 4n -C 4 H 3 (X 2 A‘) + H( 2 S 1/2 ) journal November 2001
Ab Initio Calculations for Hydrocarbons:  Enthalpy of Formation, Transition State Geometry, and Activation Energy for Radical Reactions journal October 2003
Formation of Naphthalene, Indene, and Benzene from Cyclopentadiene Pyrolysis:  A DFT Study journal April 2006
Identification and Chemistry of C 4 H 3 and C 4 H 5 Isomers in Fuel-Rich Flames journal March 2006
Identification of C 5 H x Isomers in Fuel-Rich Flames by Photoionization Mass Spectrometry and Electronic Structure Calculations journal April 2006
The Formation of Naphthalene, Azulene, and Fulvalene from Cyclic C 5 Species in Combustion:  An Ab Initio/RRKM Study of 9-H-Fulvalenyl (C 5 H 5 −C 5 H 4 ) Radical Rearrangements journal September 2007
An Ab Initio G3-Type/Statistical Theory Study of the Formation of Indene in Combustion Flames. II. The Pathways Originating from Reactions of Cyclic C 5 SpeciesCyclopentadiene and Cyclopentadienyl Radicals journal January 2008
Pyrolytic Hydrocarbon Growth from Cyclopentadiene journal December 2010
Analysis of Some Reaction Pathways Active during Cyclopentadiene Pyrolysis journal March 2012
A Combined Crossed Beam and Ab Initio Investigation of the Gas Phase Reaction of Dicarbon Molecules (C 2 ; X 1 Σ g + /a 3 Π u ) with Propene (C 3 H 6 ; X 1 A′): Identification of the Resonantly Stabilized Free Radicals 1- and 3-Vinylpropargyl journal May 2013
Pyrolysis of Methyl tert -Butyl Ether (MTBE). 1. Experimental Study with Molecular-Beam Mass Spectrometry and Tunable Synchrotron VUV Photoionization journal October 2008
Crossed Molecular Beams Study on the Formation of Vinylacetylene in Titan’s Atmosphere journal October 2009
Can the C 5 H 5 + C 5 H 5 → C 10 H 10 → C 10 H 9 + H/C 10 H 8 + H 2 Reaction Produce Naphthalene? An Ab Initio/RRKM Study journal September 2009
Identification of C 20 H 10 Dicyclopentapyrenes in Flames:  Correlation with Corannulene and Fullerene Formation journal January 1996
Pyrene synthesis in circumstellar envelopes and its role in the formation of 2D nanostructures journal March 2018
Low-temperature formation of polycyclic aromatic hydrocarbons in Titan’s atmosphere journal October 2018
The role of isovalency in the reactions of the cyano (CN), boron monoxide (BO), silicon nitride (SiN), and ethynyl (C 2 H) radicals with unsaturated hydrocarbons acetylene (C 2 H 2 ) and ethylene (C 2 H 4 ) journal January 2014
A combined crossed molecular beams and ab initio investigation on the formation of vinylsulfidoboron (C 2 H 3 11 B 32 S) journal January 2014
Polycyclic aromatic hydrocarbons, carbon nanoparticles and the diffuse interstellar bands journal January 2006
Carbon molecules in space: from astrochemistry to astrobiology journal January 2006
Untangling the chemical evolution of Titan's atmosphere and surface–from homogeneous to heterogeneous chemistry journal January 2010
A crossed beam and ab initio investigation on the formation of vinyl boron monoxide (C2H3BO; X1A′) via reaction of boron monoxide (11BO; X2Σ+) with ethylene (C2H4; X1Ag) journal January 2012
Exchange reactions of alkali atoms with alkali halides: a collision complex mechanism journal January 1967
Crossed beam reaction of cyano radicals with hydrocarbon molecules. III. Chemical dynamics of vinylcyanide (C2H3CN;X 1A′) formation from reaction of CN(X 2Σ+) with ethylene, C2H4(X 1Ag) journal November 2000
A combined crossed beam and ab initio investigation on the reaction of carbon species with C4H6 isomers. I. The 1,3-butadiene molecule, H2CCHCHCH2(X1A′) journal December 2000
A combined crossed beam and ab initio investigation on the reaction of carbon species with C4H6 isomers. II. The dimethylacetylene molecule, H3CCCCH3(X1A1g) journal December 2000
Chemical dynamics of cyclopropynylidyne (c-C[sub 3]H; X[sup 2]B[sub 2]) formation from the reaction of C([sup 1]D) with acetylene, C[sub 2]H[sub 2](X [sup 1]Σ[sub g][sup +]) journal January 2001
Chemical dynamics of d1-methyldiacetylene (CH3CCCCD; X 1A1) and d1-ethynylallene (H2CCCH(C2D); X 1A′) formation from reaction of C2D(X 2Σ+) with methylacetylene, CH3CCH(X 1A1) journal February 2001
Reaction of the ethynyl radical, C2H, with methylacetylene, CH3CCH, under single collision conditions: Implications for astrochemistry journal February 2001
A combined crossed beam and ab initio investigation on the reaction of carbon species with C4H6 isomers. III. 1,2-butadiene, H2CCCH(CH3) (X 1A′)—a non-Rice–Ramsperger–Kassel–Marcus system? journal September 2001
Photodissociation of benzene under collision-free conditions: An ab initio /Rice–Ramsperger–Kassel–Marcus study journal April 2004
Scintillation Type Mass Spectrometer Ion Detector journal March 1960
Electron Bombardment Molecular Beam Detector journal July 1966
A simple and efficient CCSD(T)-F12 approximation journal December 2007
Simplified CCSD(T)-F12 methods: Theory and benchmarks journal February 2009
Gaussian basis sets for use in correlated molecular calculations. I. The atoms boron through neon and hydrogen journal January 1989
Density‐functional thermochemistry. III. The role of exact exchange journal April 1993
Crossed‐beam reaction of C( 3 P j ) with C 2 H 2 ( 1+ g ): Observation of tricarbon‐hydride C 3 H journal December 1995
Crossed-beam reaction of carbon atoms with hydrocarbon molecules. IV. Chemical dynamics of methylpropargyl radical formation, C 4 H 5 , from reaction of C ( 3 P j ) with propylene, C 3 H 6 (X  1 A) journal March 1997
Crossed beams reaction of atomic carbon, C(3Pj), with d6-benzene, C6D6(X 1A1g): Observation of the per-deutero-1,2-didehydro- cycloheptatrienyl radical, C7D5(X 2B2) journal April 1999
Crossed-beam reaction of carbon atoms with hydrocarbon molecules. V. Chemical dynamics of n-C4H3 formation from reaction of C(3Pj) with allene, H2CCCH2(X 1A1) journal June 1999
Crossed beam reaction of the cyano radical, CN(X  2Σ+), with methylacetylene, CH3CCH (X  1A1): Observation of cyanopropyne, CH3CCCN (X  1A1), and cyanoallene, H2CCCHCN (X  1A′) journal August 1999
Crossed beam reaction of cyano radicals with hydrocarbon molecules. II. Chemical dynamics of 1-cyano-1-methylallene (CNCH3CCCH2; X 1A′) formation from reaction of CN(X 2Σ+) with dimethylacetylene CH3CCCH3 (X 1A1′) journal October 1999
The chemistry in circumstellar envelopes of evolved stars: Following the origin of the elements to the origin of life journal August 2006
Charged polycyclic aromatic hydrocarbon clusters and the galactic extended red emission journal March 2007
High molecular diversity of extraterrestrial organic matter in Murchison meteorite revealed 40 years after its fall journal February 2010
Formation of benzene in the interstellar medium journal December 2010
Low temperature formation of naphthalene and its role in the synthesis of PAHs (Polycyclic Aromatic Hydrocarbons) in the interstellar medium journal December 2011
Modeling of Aromatic and Polycyclic Aromatic Hydrocarbon Formation in Premixed Methane and Ethane Flames journal August 1996
Aromatic and Polycyclic Aromatic Hydrocarbon Formation in a Premixed Propane Flame journal October 1997
PAHs in Road Dust: Ubiquity, Fate, and Summary of Available Data journal June 2012
Formation of polycyclic aromatic hydrocarbons in circumstellar envelopes journal June 1989
Interstellar polycyclic aromatic hydrocarbons - The infrared emission bands, the excitation/emission mechanism, and the astrophysical implications journal September 1989
Neutral‐Neutral Reactions in the Interstellar Medium. I. Formation of Carbon Hydride Radicals via Reaction of Carbon Atoms with Unsaturated Hydrocarbons journal March 1997
Indigenous Polycyclic Aromatic Hydrocarbons in Circumstellar Graphite Grains from Primitive Meteorites journal July 1998
Chemical Evolution of Carbonaceous Material in Interstellar Clouds journal January 2000
Astrochemistry: From Molecular Clouds to Planetary Systems: IAU Symposium 1971 journal February 2000
The Infrared Spectrum of Protonated Naphthalene and its Relevance for the Unidentified Infrared Bands journal August 2009
Can Neutral and Ionized Polycyclic Aromatic Hydrocarbons be Carriers of the Ultraviolet Extinction bump and the Diffuse Interstellar Bands? journal October 2011
Electronic Spectroscopy of Medium-Sized Polycyclic Aromatic Hydrocarbons: Implications for the Carriers of the 2175 Å uv bump journal February 2010
Development of the Colle-Salvetti correlation-energy formula into a functional of the electron density journal January 1988
Interstellar graphite in meteorites: Isotopic compositions and structural properties of single graphite grains from Murchison journal March 1995
Fullerenes, fulleranes and polycyclic aromatic hydrocarbons in the Allende meteorite journal July 1997
Detection of C60 and C70 in a Young Planetary Nebula journal July 2010
In Situ Discovery of Graphite with Interstellar Isotopic Signatures in a Chondrule-Free Clast in an L3 Chondrite journal May 1998
UV Irradiation of Polycyclic Aromatic Hydrocarbons in Ices: Production of Alcohols, Quinones, and Ethers journal February 1999
Complex Organic Interstellar Molecules journal September 2009
Reaction Dynamics in Astrochemistry: Low-Temperature Pathways to Polycyclic Aromatic Hydrocarbons in the Interstellar Medium journal April 2015
A New Component of the Interstellar Matter: Small Grains and Large Aromatic Molecules journal September 1989
Interstellar Polycyclic Aromatic Hydrocarbon Molecules journal September 2008
Development of the Colle-Salvetti correlation-energy formula into a functional of the electron density text January 1988