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How would i distinguish between a secondary alcohol and a aldehyde?
Original post by EthanGolin
How would i distinguish between a secondary alcohol and a aldehyde?
Secondary alcohol has OH attached to a Carbon, which is bound to 2 alkyl groups.

Aldehyde is C=O at end of molecule.
Ketone has C=O not at the end.

An alcohol can partially oxidise with H+, Cr2O7 orange to green
(edited 1 month ago)
Reply 2
Original post by BankaiGintoki
Secondary alcohol has OH attached to a Carbon, which is bound to 2 alkyl groups.
Aldehyde is C=O at end of molecule.
Ketone has C=O not at the end.


nah i mean like what chemical test can i use to distinguish between the two
I have a long winded way.
Go from alcohol to alkene using reflux and concentrated H3PO4. Then test for alkene using BR2, should go from orange to colourless. [aldehyde wont go to alkene]
(edited 1 month ago)
Original post by EthanGolin
How would i distinguish between a secondary alcohol and a aldehyde?

Keep it simple - just do Tollen’s test with ammoniated silver nitrate. The aldehyde will give a silver mirror, the alcohol will just sit there and do nothing. No need for anything sophisticated
(edited 1 month ago)
Reply 5
Original post by UtterlyUseless69
Keep it simple - just do Tollen’s test with ammoniated silver nitrate. The aldehyde will give a silver mirror, the alcohol will just sit there and do nothing. No need for anything sophisticated


thank you!

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