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Journal of Physical Chemistry, Vol.99, No.33, 12371-12374, 1995
Interpretation of the Photofragment Anisotropy Observed upon N-)Pi-Asterisk (C=O) Excitation of Acetyl Halides
The photodissociation of acetyl bromide has been probed at 266 nm and around 280 nm with REMPI detection of products. The,primary dissociation channel is C-Br bond cleavage, although evidence for the secondary fragmentation of acetyl radical is obtained. The distribution of primary photoproducts is markedly anisotropic with beta = +0.7, similar to other acetyl halides. The interpretation of this anisotropy is reviewed in the light of ab initio calculations predicting a pyramidal excited-state structure.