✦ LIBER ✦

Fine structure of the CCl3 UV absorption spectrum and CCl3 kinetics

✍ Scribed by Thomas Ellermann

Publisher: Elsevier Science
Year: 1992
Tongue: English
Weight: 571 KB
Volume: 189
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(92)85119-u

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✦ Synopsis

The UV gas-phase spectrum of Ccl3 was recorded in the range 220-300 nm using pulse radiolysis of CHClI/SF6 or CCl,/Ar gas mixtures. The UV spectrum exhibits a pronounced vibrational fine structure which is assigned to transition into the (C *A', (3s) ) Rydberg state. The vibronic progression has a band origin around 250 nm and the spacing of 569k63 cm-' is ascribed to excitation of the out-of-plane bending mode. The absorption cross section with a maximum of c= ( 1.02 k 0.16 ) X IO-" cm* molecule-' at 224.80f0.16 nm was determined relative to con) and c&02. The rate constants for CClr+CCl,+ M+ CZC16+M andCCl,+Cl+M+CC&+Mare

(5.9f. 1.3)~ IO-'*and (6.5f 1.4)x10-"cm'moleculee's_', respectively,at 298f2 K and 1 atm total pressure.

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