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Title: Hydrogen-Abstraction/Acetylene-Addition Exposed

Journal Article · · Angewandte Chemie (International Edition)

Polycyclic aromatic hydrocarbons (PAHs) are omnipresent in the interstellar medium (ISM) and also in carbonaceous meteorites (CM) such as Murchison. However, the basic reaction routes leading to the formation of even the simplest PAH—naphthalene (C10H8)—via the hydrogen-abstraction/acetylene-addition (HACA) mechanism still remain ambiguous. By revealing the uncharted fundamental chemistry of the styrenyl (C8H7) and the ortho-vinylphenyl radicals (C8H7)—key transient species of the HACA mechanism—with acetylene (C2H2), we provide the first solid experimental evidence on the facile formation of naphthalene in a simulated combustion environment validating the previously postulated HACA mechanism for these two radicals. This study highlights, at the molecular level spanning combustion and astrochemistry, the importance of the HACA mechanism to the formation of the prototype PAH naphthalene.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Univ. of Hawaii at Manoa, Honolulu, HI (United States); Florida International Univ. (FIU), Miami, FL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences, and Biosciences Division
Grant/Contract Number:
AC02-05CH11231; FG02‐03ER15411; FG02‐04ER15570; FG02-03ER15411; FG02-04ER15570
OSTI ID:
1464134
Alternate ID(s):
OSTI ID: 1602921
Journal Information:
Angewandte Chemie (International Edition), Vol. 55, Issue 48; Related Information: © 2016 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim; ISSN 1433-7851
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 45 works
Citation information provided by
Web of Science

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Cited By (7)

Synthesis of Polycyclic Aromatic Hydrocarbons by Phenyl Addition–Dehydrocyclization: The Third Way journal November 2019
Synthesis of Polycyclic Aromatic Hydrocarbons by Phenyl Addition-Dehydrocyclization: The Third Way journal October 2019
Molecular mass growth through ring expansion in polycyclic aromatic hydrocarbons via radical–radical reactions journal August 2019
Polycyclic aromatic hydrocarbon formation chemistry in a plasma jet revealed by IR-UV action spectroscopy journal January 2020
Low-temperature formation of polycyclic aromatic hydrocarbons in Titan’s atmosphere journal October 2018
From benzene to naphthalene: direct measurement of reactions and intermediates of phenyl radicals and acetylene journal January 2019
Application of High-Resolution NMR and GC–MS to Study Hydrocarbon Oils Derived from Noncatalytic Thermal Transformation of e-Waste Plastics journal August 2018

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