SPECTROSCOPIC IDENTIFICATION OF $\textit{p}$-CHLORO-$\alpha$-METHYLBENZYL RADICAL IN THE GAS PHASE
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Date
2009
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Ohio State University
Abstract
We report the first spectroscopic identification of the \textit{p}-fluoro-$\alpha$-methylbenzyl radical in the gas phase. Precursor \textit{p}-fluoro-ethylbenzene seeded in a large amount of inert carrier gas helium was electrically discharged to produce the benzyl-type radicals in a corona excited supersonic expansion using a pinhole-type glass nozzle, from which the vibronic emission spectrum was recorded in the visible region using a long path monochromator. From an analysis of the spectrum observed, we found the formation of \textit{p}-fluoro-$\alpha$-methylbenzyl radical as well as \textit{p}-fluorobenzyl radical in the jet from the precursor. After eliminating the bands belonging to \textit {p}-fluorobenzyl radical using the known data, \underline{\textbf{301}}(3-4), 407-412 (1999).} we identified spectroscopically the formation of the \textit{p}-fluoro-$\alpha$-methylbenzyl radical, in which the energy of the D$_1$ $\rightarrow$ D$_0$ electronic transition and a few vibrational mode frequencies in the ground electronic state were determined by comparison with those from an \textit{ab initio} calculation and with those from the known data of the precursor.
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S.~K.~Lee and D.~Y.~Baek \textit {Chem.~Phys.~Lett.
Author Institution: Department of Chemistry and the Chemistry Institute of Functional Materials,Pusan National University, Pusan 609-735, Republic of Korea
Author Institution: Department of Chemistry and the Chemistry Institute of Functional Materials,Pusan National University, Pusan 609-735, Republic of Korea