On the formation of ethynylbiphenyl (C14D5H5; C6D5C6H4CCH) isomers in the reaction of D5-phenyl radicals (C6D5; X2A1) with phenylacetylene (C6H5C2H; X1A1) under single collision conditions
Journal Article
·
· Chemical Physics Letters
- Univ. of Hawaii at Manoa, Honolulu, HI (United States); University of Hawaii at Manoa
- Univ. of Hawaii at Manoa, Honolulu, HI (United States)
- Florida International Univ., Miami, FL (United States)
Reaction dynamics of the D5-phenyl radical with phenylacetylene were explored in crossed molecular beams at a collision energy of 120.7 kJ mol-1 supported by ab initio calculations. The reaction displays indirect, complex forming scattering dynamics, and adduct formation, with D5-phenyl attacking the phenyl ring of phenylacetylene at the ortho, meta and para positions over small entrance barriers. The adduct (C6D5C8H6) undergoes hydrogen emission through tight exit transition states of 34–47 kJ mol-1 above the separated products. The phenyl addition–hydrogen elimination mechanism produces various ethynylbiphenyls exoergically by 25–38 kJ mol-1. No phenanthrene was formed under these experimental conditions.
- Research Organization:
- Florida International Univ., Miami, FL (United States); Univ. of Hawaii, Honolulu, HI (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
- Grant/Contract Number:
- FG02-03ER15411; FG02-04ER15570
- OSTI ID:
- 1602777
- Journal Information:
- Chemical Physics Letters, Journal Name: Chemical Physics Letters Journal Issue: C Vol. 595-596; ISSN 0009-2614
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
On the formation and the isomer specific detection of methylacetylene (CH 3 CCH), propene (CH 3 CHCH 2 ), cyclopropane (c-C 3 H 6 ), vinylacetylene (CH 2 CHCCH), and 1,3-butadiene (CH 2 CHCHCH 2 ) from interstellar methane ice analogues
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