N. Ayachit, K. Rao, M. Shashidhar
1986
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Journal
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
Abstract
Abstract The π* ← n electronic absorption system of 2,6-dichloropyrazine, corresponding to the 1 B 3 u ← 1 A 1 g transition of pyrazine, has been recorded in the vapour phase and in solution in cyclohexane. A vibrational analysis of this system has been proposed and it is shown that vibronic interaction between two excited states of 2,6-dichloropyrazine exists. Another system is observed in the solution spectrum of this molecule in cyclohexane and it is shown to be a π* ← π transition analogous to the 1 B 2 u ← 1 A 1 g transition in pyrazine.