A parallel band at 2,200 cm-1 and a perpendicular ba nd at 2,780 cm-1 of CH 3D h ave heen obser ved un der h igh resolu tion and analysed.The analysis of the perpendicular band "evealed the presence of I-type doublin g in the doubly degenerate excited state.From the a nalysis of the parallel band it is found that 8 0= 3.880 em-I.A hybrid band of CD3H has bee n obser ved near 2,600 cm-I .Both active components, A a nd E arc obser ved and ana-Lyse d .The gro nn d state Bo value fou nd from t his a n alysis is in good ag reement with previous c.
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Allen et al. (1959) studied this question.