Abstract

The rotational contours of the naphthalene absorption bands at 32 458 and 32 521 cm −1 are re-analyzed, in asymmetric, rigid-rotor approximation. They are confirmed to exhibit transition moments in the plane of the molecule, the first along the central carbon—carbon bond and the second along the in-plane direction perpendicular to the first; that is the bands are type- B and type- A, respectively. The parameters that are well determined are the band center and the changes of two inertial constants for type- B and the band center only for type- A.

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