Journal
JOURNAL OF PHYSICAL CHEMISTRY A
Volume 125, Issue 10, Pages 2139-2145Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpca.1c00577
Keywords
-
Funding
- Ministry of Science and Technology, Taiwan [MOST109-2639-M-009-001ASP, MOST109-2634-F-009-028]
- Center for Emergent Functional Matter Science of National Chiao Tung University from The Featured Areas Research Center Program
Ask authors/readers for more resources
The addition reaction of halogens to alkenes is crucial in organic synthesis, with the structure of the intermediate bromoethyl radical, whether it is bridged or open form, being unclear. Researchers successfully recorded and analyzed the IR spectrum of the bromoethyl radical intermediate using the diminished cage effect of solid p-H-2 and IR absorption technique.
The addition reaction of halogens to alkenes is important in organic synthesis, but the reaction intermediate has rarely been detected. Whether the structure of the intermediate bromoethyl (C2H4Br center dot) radical is a bridged form or an open form is unclear. We took advantage of the diminished cage effect of solid p-H-2 and employed infrared (IR) absorption to record the IR spectrum of C2H4Br center dot after photolysis of a C2H4/Br-2/p-H-2 matrix at 254 nm, followed by annealing. New spectral features at 676.9, 776.7, 1068.5, 1148.0, 3041.8, and 3126.8 cm(-1) are assigned to the open-form 2-bromoethyl radical, according to their photolytic behavior and comparison with scaled harmonic vibrational wavenumbers and IR intensities calculated with the B2PLYPD3/6-311++G(2df,2p) method.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available