in homologous series of ketones why the first member is propanone?
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The functional group ketone - CO is always added in the middle of a carbon chain. Therefore in an organic compound with a ketone group there should be at least 3 carbon atoms so that the ketone group lies in between.
Since methanone would only contain 1 carbon atom - no such compound exists, the first compound with a susbstitued ketone group is thus propanone.
Since methanone would only contain 1 carbon atom - no such compound exists, the first compound with a susbstitued ketone group is thus propanone.
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Since ketone group can not be added in the terminal end it is added in the middle of a carbon chain. To be in the middle it requires at least three carbon atom, one to the left and on to the right. According to word root three carbon means PROP. So the ketone group starts from propanal.
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