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Why glucose does not gives 2 …

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Why glucose does not gives 2 4 DNP test

Posted by Keshav Choudhary 4 years, 7 months ago

CBSE > Class 12 > Chemistry

1 answers

Mehak Verma 4 years, 7 months ago

Although, glucose in its open chain structure contains a free aldehydic group yet it does not give 2,4-DNP test, a characteristic reaction of aldehyde,i.e. -CHO group. This is because glucose actually exists in the cyclic hemiacetal form with only a small amount of the open chain form in equilibrium. Since,the concentration of the open chain form is very low and its reaction with 2,4-DNP are reversible, thus its 2,4-DNP adduct is generally not observed.

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CBSE > Class 12 > Chemistry