Genre
- Journal Article
The C=O stretching vibration appears in the infrared spectra of 2-naphthaldehyde (1), 2-acetonaphthone (2), 2-naphthoic acid (3), methyl 2-naphthoate (4) and 1,2-dihydro-3H-benz[e]inden-3-one (5) in the state T-1(pi pi*) between 1600 and 1700 cm(-1). There is a strong line in the Raman spectrum of 1-5 in the state S-0 arising from the C=O stretching mode, but such a line is lacking in their resonance Raman spectra when they are in the state T-1. This is attributed to a large amplitude out-of-plane twist of the C=O group in 1-4 and to a pyramidalization of the C atom in the C=O group of 5 in the equilibrium geometry of the state T-1.
LEIDEN UNIV,GORLAEUS LABS,LEIDEN INST CHEM,2300 RA LEIDEN,NETHERLANDS. NATL RES COUNCIL CANADA,STEACIE INST MOLEC SCI,OTTAWA,ON K1A 0R6,CANADA.
AMSTERDAM; PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
ELSEVIER SCIENCE BV
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Source type: Electronic(1)
Language
- English
Subjects
- ANOMALOUS FLUORESCENCE
- Physics, Atomic, Molecular & Chemical
- 3,5,N,N-TETRAMETHYL-4-AMINOBENZONITRILE TMABN
- 4-N,N-DIMETHYLAMINOBENZONITRILE DMABN
- Chemistry, Physical
- POLAR-SOLVENTS
- spectra
- 4-PHENYLBENZOPHENONE
- SOLUTE-SOLVENT INTERACTIONS
- RESONANCE RAMAN-SCATTERING
- EXCITED-STATES
- TRANS-STILBENE