Question on Problem 6.21

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AChoudhry_1L
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Joined: Sat Sep 07, 2019 12:17 am

Question on Problem 6.21

Postby AChoudhry_1L » Mon Dec 02, 2019 7:43 pm

The two strands of the nucleic acid DNA are held together by hydrogen bonding between four organic bases. The structure of one of these bases, thymine, is shown below. (a) How many pro- tons can this base accept? (b) Draw the structure of each conjugate acid that can be formed. (c) Mark with an asterisk any structure that can show amphiprotic behavior in aqueous solution.

When drawing the conjugate acids, why do the protons only attach to the NH groups and not the oxygens?

Cynthia Gong 1L
Posts: 51
Joined: Fri Aug 09, 2019 12:15 am

Re: Question on Problem 6.21

Postby Cynthia Gong 1L » Tue Dec 03, 2019 10:38 am

This is because oxygen is more electronegative and less likely to share its electrons with a proton


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