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On acetylation with acetic anhydride, gl...

On acetylation with acetic anhydride, glucose gives

A

hexaacetate

B

pentaacetate

C

tetraacetate

D

triacetate

Text Solution

Verified by Experts

The correct Answer is:
B
Pentaacetate is formed as glucose contains `5 - OH` groups:
`HOCH_(2) (CHOH)_(4) (CHO) rarr Ac OCH_(2) (CHOAc)_(4) CHO`
`(Ac rarr CH_(3) CO-)`
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Knowledge Check

  • Acetylation of glucose with acetic anhydride gives

    A
    Glucose hexaacetate
    B
    Glucose pentaacetate
    C
    Glucose butaacetate
    D
    Glucose diacetate

  • Acetic anhydride is used:

    A
    as an acetylating agent
    B
    for the detection and estimation of -OH and `-NH_(2)` groups
    C
    in the manufacture of aspirin
    D
    all of the above

  • Assertion (A): On prolonged healing with HI, glucose forms H-hexane. Reason (R) Acetylation of glucose with acetic anhydride gives glucose pentaacetate which confirms the presence of five - OH groups.

    A
    Both Assertion (A) and Reason (R) are correct statement and Reason (R) is the correct explanation of the Assertion (A).
    B
    Both Assertion (A) and Reason (R) are correct statements, but Reason(R) is not the correct explanation of the Assertion (A).
    C
    Assertion (A) is correct , but Reason (R) is incorrect statement
    D
    Assertion (A) is incorrect , but Reason (R) is correct statement.

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    Acetylation of glucose with acetic anhydride gives glucose penta-acetate. Write the structure of penta acetate.

    Cellobiose upon acetylation with excess acetic anhydride / H_(2)SO_4 (catalytic) gives triacetate whose structure is_______.

    Aniline reacts with acetic anhydride to give

    Ehtanol reacts with acetic anhydride to give :

    Cellulose upon acetylation with excess acetic anhydride/ H_(2)SO_(4) (catalytic) gives cellulose triacetate whose structure is

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