A study of the spectra of medium-and large-ring carbocyclic 2-bromoketones, ketone-enol acetates and unsaturated ketones has provided interesting information concerning their stereochemistry. In particular, the infrared shifts observed for the carbonyl maximum in going from the cyclic ketone to the corresponding 2-bromoketone indicate that the average conformations of 2-bromocyclooctanone, 2-bromocyclononanone and 2- ...
