Question

explain the d/f b/w polyhydroxy aldehyde & polyhydroxy ketone​

Answer 1

Answer:

Polyhydroxy aldehydes are organic compounds containing many hydroxyl groups (-OH) and an aldehyde group (-C(=O)H) while Polyhydroxy ketones are organic compounds containing many hydroxyl groups and a ketone group (-C(=O)-). So, the key difference between polyhydroxy aldehydes and polyhydroxy ketone is their functional group: aldehyde group or ketone group.

However, both these compounds have carbonyl groups. But, in polyhydroxy aldehydes, the carbonyl group occurs at the terminal of the molecule while, in polyhydroxy ketones, it occurs at the second carbon atom from one terminal. So, this is also a difference between polyhydroxy aldehydes and polyhydroxy ketone. Further, both these compounds can form cyclic compounds via combining the functional group with one of the hydroxyl groups, removing a water molecule. Here, the cyclic compound that forms from polyhydroxy aldehyde is as “hemiacetal” while for polyhydroxy ketones it is