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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.
Ch18 Ketones and Aldehydes (landscape) Page 4. Systematic names for aldehydes are obtained by replacing -e with -al. An aldehyde has to be at the end of a chain, and therefore it is carbon number 1. If the aldehyde is attached to a large unit, the suffix -carbaldehyde is used.