Ketones are the first oxidation products of secondary alcohols. The functional group in ketones is keto or oxo group (>C = O). The keto group is not located at the terminal carbon of the chain.
Classification of ketones: Depending upon the type of alkyl group (R) attached to the carbonyl carbon, ketones are classified into simple ketones (symmetrical ketones) and mixed ketones (unsymmetrical ketones).
a. Simple ketones (Symmetrical ketones): When both the alkyl groups present in a ketone are same (identical), then the ketone is called a simple or symmetrical ketone.
b. Mixed Ketones (Unsymmetrical ketones): When both the alkyl groups present in a ketone are different, then the ketone is called mixed or unsymmetrical ketone.
