3. Draw the most stable chair conformation of glucose. OH HO HO HO HO: 4. Ascorbic acid (vitamin C) pKa = 4.2 does not contain a carboxylic acid group, but is fairly acidic. Identify the acidic proton and explain the choice using resonance structures. : OH OH HO : OH :O:

3. Draw the most stable chair conformation of glucose. OH HO HO HO HO: 4. Ascorbic acid (vitamin C) pKa = 4.2 does not contain a carboxylic acid group, but is fairly acidic. Identify the acidic proton and explain the choice using resonance structures. : OH OH HO : OH :O:

Organic Chemistry

9th Edition

ISBN:9781305080485

Author:John E. McMurry

Publisher:John E. McMurry

Chapter20: Carboxylic Acids And Nitriles

Section20.SE: Something Extra

Problem 41AP

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Mass Spectrometry

This process is an instrumental method in which a sample is changed to fast moving positive ions by electron bombardment. The charged particles vary due to their different mass to charge ratio and are estimated with the help of this difference. It is also called mass spectroscopy.

Question

3. Draw the most stable chair conformation of glucose.
OH
HO...
НО
HO
HO:
4. Ascorbic acid (vitamin C) pKa = 4.2 does not contain a carboxylic acid group, but is
fairly acidic. Identify the acidic proton and explain the choice using resonance structures.
: OH
OH
HO
: OH

Expert Solution

Step 1

(1)in chair conformation most stable structure having most of its substituent on equitorial position

(2)acidic proton stable by :(a)resonance.

(b)if there is electronegative atom then proton attached to it is most acidic.

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