Electronic spectra of the heteroisotopic CH{sub 2}D and CHD{sub 2} methyl radicals by resonance enhanced multiphoton ionization

Conference · Fri Dec 31 04:00:00 EST 1993

OSTI ID:141485

Brum, J L; Johnson, III, R D; Hudgens, J W ^[1]

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1. National Inst. of Standards and Technology, Gaithersburg, MD (United States)

The 3p {sup 2}B{sub 1} {l_arrow}{l_arrow} {tilde X} {sup 2}B{sub 1} bands of CH{sub 2}D and CHD{sub 2} radicals were observed between 305 and 335 nm by mass resolved, 2 + 1 resonance enhanced multiphoton ionization (REMPI) spectroscopy. Spectroscopic constants were found for the 3p {sup 2}B{sub 1} Rydberg state of the CH{sub 2}D radical ({nu}{sub 00} = 59940 cm{sup {minus}1}, {nu}{sub 1} a{sub 1} CH{sub 2} stretch = 2995 c {sup {minus}1}, {nu}{sub 2} a{sub 1} CD stretch = 2220 cm {sup {minus}1}, {nu}{sub 4} b{sub 1} OPLA = 1260 cm{sup {minus}1} {nu}{sub 5} b{sub 2} CH{sub 2} asym stretch = 3055 cm{sup {minus}1}, {nu}{sub 6} b{sub 2} CD bend = 1115 cm{sup {minus}1}) and of the CHD{sub 2} radical ({nu}{sub 00} = 59920 cm {sup {minus}1}, {nu}{sub 1} a{sub 1} CH stretch 3040 cm{sup {minus}1}, {nu}{sub 2} a{sub 1} CD{sub 2} stretch = 2150 cm{sup {minus}1}, {nu}{sub 4} b{sub 1} OPLA = 1165 cm{sup {minus}1}, {nu}{sub 6} b{sub 2} CH bend = 1210 cm{sup {minus}1}). Vibrational frequencies calculated by ab initio theory agree well with the experimental data.

• OSTI ID: 141485
• Report Number(s): CONF-930304--
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
66 PHYSICS
DEUTERIUM COMPOUNDS
ELECTRONIC STRUCTURE
METHYL RADICALS
SPECTRA
VIBRATIONAL STATES