Common Names ■for Ketones Named as alkyl attachments to -C=O. OUse Greek letters instead of numbers. 0 0 CH3一C一CH-CH3 CH;CH-C-CH-CH3 CH3 Br CH: methyl isopropyl ketone a-bromoethyl isopropyl ketone Historical Common Names CH; acetone acetophenone benzophenone Common Names for Ketones Named as alkyl attachments to -C=O. Use Greek letters instead of numbers. Historical Common Names CH 3 C O CH CH 3 CH 3 CH 3CH C O CH CH 3 CH 3 Br methyl isopropyl ketone bromoethyl isopropyl ketone CH 3 C O CH 3 C CH 3 O C O acetone acetophenone benzophenone