Tollens, Benedicts, and 2,4-DNP

[Murl]

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Tollens: reacts with an aldehyde and ??????
Benedicts:
2,4-DNP:

Could someone help me out with these, my intstructor didn't cover them and my organic txt doesn't have much about any of these except tollens reacts with an alcohol..

 

[ZH1988]

Tollens: reacts with an aldehyde and ??????
Benedicts:
2,4-DNP:

Could someone help me out with these, my intstructor didn't cover them and my organic txt doesn't have much about any of these except tollens reacts with an alcohol..

tollens: aldehyde and alpha-hydroxy ketone
2,4-DNP: carbonyl group
Benedicts: if positive that means there is glucose if negative it means sucrose

 

[namiie]

Benedicts: if positive that means there is glucose if negative it means sucrose

So could you say that it's positive if there's a reducing sugar (hemiacetal) and negative if there's a non-reducing sugar (acetal)?

Thanks!

 

[ZH1988]

So could you say that it's positive if there's a reducing sugar (hemiacetal) and negative if there's a non-reducing sugar (acetal)?

Thanks!

yeah that works too

 

[Murl]

cool thanks guys