Mj. Bramwell et al., A theoretical and experimental study of the HPCl radical: the (A)over-tilde(2)A ' -> (X)over-tilde(2)A '' visible emission spectrum, CHEM P LETT, 331(5-6), 2000, pp. 483-488
We report the first observation of the (A) over tilde (2)A' --> (X) over ti
lde (2)A " visible emission spectrum of HPCl. The spectrum shows a series o
f blue-degraded bands with two prominent progressions in the ground state b
ending vibration. Ab initio calculations are used to help to assign the obs
erved spectrum. The experimentally derived constants are T-0 = 21 305 cm(-1
), omega (2)" = 868 cm(-1) omega (2)' = 622 cm(-1) and omega (3)' = 529 cm(
-1) compared with calculated values of T-0 = 23 518 cm(-1), omega (2)" = 89
3 cm(-1) omega (2)' = 670; cm(-1) and omega (3)' = 524 cm(-1). The bending
progression results from a substantial change in the bond angle between the
ground and electronically excited states from 96 degrees to 118 degrees. (
C) 2000 Elsevier Science B.V. All rights reserved.