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Prakash Kumar posted an Question
July 10, 2021 • 15:54 pm 30 points
  • CSIR NET
  • Life Sciences

While mutarotaion the sugar ring open and reclosed, which type of energy get involved in this process and how?

while mutarotaion the sugar ring open and reclosed, which type of energy get involved in this process and how?

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  • Priya sarda best-answer

    Mutarotation in Glucose The first kinetic study of glucose was proposed by Bronsted and Guggenheim, where they proposed that the mutarotation of glucose may follow either acid or base catalysis. Glucose has two diastereomeric forms, alpha and beta forms. Both forms are different in physical properties.For example, the addition of methanol causes the crystallization of D-glucose into alpha-D-Glucose, which melts at 46 °C. Whereas, the acetic acid addition forms the beta form of the sugar that melts at 150 °C. The specific rotation of the alpha-beta form is +112.2 and +18.7. So, when a cyclic glucose molecule is added to water, it undergoes reversible epimerization to another form of glucose via the linear open-chain form. Here, the specific rotation of the solution gradually changes to +52.7°, which shows the equilibrium state.  The mixture is composed of 36% alpha-D-glucose, 64% beta-D-glucose, and 0.02% open-chain glucose. The three steps involved in the interconversion of the pyranose form of glucose to the aldehyde form are: 1.The protonation of O5 2.The breaking of the O1-H bond (intramolecular transfer) 3.The breaking of the O5-C1 bond

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