difference between the attachment of functional group in aldehyde and ketone

The main difference between the attachment of functional groups in aldehydes and ketones lies in their structure and location on the carbon chain.

1. Aldehydes: In an aldehyde, the carbonyl group (C=O) is always at the end of the carbon chain. This means the carbon atom in the carbonyl group is always attached to at least one hydrogen atom. The general formula for an aldehyde is RCHO, where R can be a hydrogen atom (forming formaldehyde, HCHO) or any alkyl or substituted alkyl group.

2. Ketones: In a ketone, the carbonyl group is located anywhere within the carbon chain, but not at the end. This means the carbon atom in the carbonyl group is always attached to two other carbon atoms. The general formula for a ketone is RCOR', where R and R' can be the same or different, and represent any alkyl or substituted alkyl group.

So, the main difference lies in the position of the carbonyl group in the molecule. In aldehydes, it's at the end of the chain, while in ketones, it's in the middle.