The Formation of Electronically Excited Fragments by the Electron Impact of Furan and Related Five-membered Heterocycles

In the wavelength region of 200–600 nm, photoemissions from electronically excited H, CH, C2, and CS (only from thiophene and tetrahydrothiophene) were observed when furan, tetrahydrofuran, thiophene, and tetrahydrothiophene were excited by electron impact (0–70 eV). Hydrogen atoms (n=4) and CH(A2Δ)...

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Published inBulletin of the Chemical Society of Japan Vol. 56; no. 2; pp. 583 - 587
Main Authors Tokue, Ikuo, Ikarashi, Masami, Takizawa, Sadachika, Ito, Yoshio
Format Journal Article
LanguageEnglish
Published Tokyo The Chemical Society of Japan 01.02.1983
Chemical Society of Japan
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Summary:In the wavelength region of 200–600 nm, photoemissions from electronically excited H, CH, C2, and CS (only from thiophene and tetrahydrothiophene) were observed when furan, tetrahydrofuran, thiophene, and tetrahydrothiophene were excited by electron impact (0–70 eV). Hydrogen atoms (n=4) and CH(A2Δ) radicals were produced from these five-membered heterocycles via single collision excitations, while CS(A1Π) radicals from thiophene and tetrahydrothiophene were partly formed in secondary processes. The appearance potentials for the hydrogen Balmer β and the CH(A2Δ-X2Π) bands from these five-membered heterocycles are determined, and the dissociation processes forming H(n=4) and CH(A) are discussed.
ISSN:0009-2673
1348-0634
DOI:10.1246/bcsj.56.583