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alkane-CnH2n+2 alkene-CnH2n alkyl-CnH2n+1 aldehyde-R-CHO where R is any alkyl group ketone-R-CO-R where R is any alkyl group cycloalkane-CnH2n. svetlana Â· 5 years ago.
The simplest carbonyl compounds are aldehydes and ketones. A ketone has two alkyl (or aryl) groups bonded to the carbonyl carbon. An aldehyde has one alkyl (or aryl) group and one hydrogen bonded to the carbonyl carbon.