
%0 Journal Article
%A McHugh, AJ 
%A Ramsay, DA 
%A Ross, IG 
%T Spectrum of azulene. IV. Rotational analysis of the 0-0 band of the 3500 &#506; transition
%J Australian Journal of Chemistry
%D 1968/12/01
%V 21
%N 12
%P 2835-2845
%K 
%R https://doi.org/10.1071/CH9682835
%U https://www.publish.csiro.au/paper/CH9682835 
%X The bands of the 3500 &#506; transition of azulene-do and azulene-ds show two unequal peaks 2.3 cm-l apart, followed by closely spaced fine structure. These bands have been analysed as type A bands of a planar, prolate asymmetric top. Rotational constants for both molecules in the excited state have been determined. The fine structure is due to multiple line coincidences in the high-J, low-K region of the qP branch. To each multiple line can be attributed a running number n = J+m, where m = J-K-1. Given sufficient resolving power, such &quot;lines&quot; should be rather commonly observed in type A and type B bands of large, planar, prolate molecules. 
