1 A 2←1A1 Transition of Formaldehyde
- 1 May 1966
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 44 (9) , 3496-3500
- https://doi.org/10.1063/1.1727255
Abstract
The 1A2←1A1 system of HCHO is explained as vibronic transitions between the pure 1A1 ground state and an excited state which is a superposition of the 1A2, 1B1, and 1B2 states. It is shown that vibronic interaction through the ν4, ν5, and ν6 normal modes couples the excited electronic states. Through symmetry arguments, one comprehensive theoretical treatment explains the parallel bands as magnetic‐dipole transitions between the ground state and the 1A2 component of the excited state, while the perpendicular bands are interpreted as transitions to the 1B1 and 1B2 components of the mixed excited state. Intensity ratios of Type B/Type A bands are explained quantitatively through calculations of excited‐state vibrational wavefunctions.Keywords
This publication has 8 references indexed in Scilit:
- 3546-Å System of FormaldehydeThe Journal of Chemical Physics, 1965
- Magnetic dipole transition in the electronic spectrum of formaldehydeJournal of Molecular Spectroscopy, 1963
- Intensity of the Symmetry-Forbidden Electronic Absorption Band of FormaldehydeThe Journal of Chemical Physics, 1957
- SOME RESULTS OF THE HIGH DISPERSION ELECTRONIC EMISSION SPECTRUM OF FORMALDEHYDECanadian Journal of Physics, 1956
- The Intensities of the Symmetry-forbidden Electronic Bands of BenzeneProceedings of the Physical Society. Section A, 1956
- Selection Rules for Singlet-Triplet Perturbations in Polyatomic MoleculesThe Journal of Chemical Physics, 1949
- The Long Wave-Length Spectra of Aldehydes and Ketones Part I. Saturated Aldehydes and KetonesThe Journal of Chemical Physics, 1941
- Mechanism of Long Wave-Length Absorption of the Carbonyl GroupProceedings of the National Academy of Sciences, 1940