Evidence for molecular distortion involving the ...
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Citation
| Title | Evidence for molecular distortion involving the carbonyl group in triplet states of carbonyl derivatives of naphthalene obtained from time resolved vibrational spectroscopic studies |
| Author(s) | M. Vanderburgt, A. Huizer, C. Varma, B. Wagner, J. Lusztyk |
| Journal | Chemical Physics |
| Date | 1995 |
| Volume | 196 |
| Issue | 1-2 |
| Start page | 193 |
| End page | 210 |
| Abstract | 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. |
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