Glycine Amphoteric

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Racquel Fox 2I
Posts: 110
Joined: Wed Sep 30, 2020 10:11 pm

Glycine Amphoteric

Postby Racquel Fox 2I » Sat Dec 12, 2020 2:50 pm

For the lewis structure of glycine, (NH2CH2COOH), you get N with a lone pair, and two O with two lone pairs. The lone pair on the N contributes to the amphoteric character, but why wouldn't the lone pairs on the O atoms?
I'm not sure if that makes sense, but I'm just a little confused why the lone pairs on the O wouldn't contribute to the proton accepting properties as well?

Sana Nagori 2H
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Re: Glycine Amphoteric

Postby Sana Nagori 2H » Sat Dec 12, 2020 3:04 pm

I think because if oxygen donated a pair it would end up with a positive formal charge and oxygens do not want that.

Racquel Fox 2I
Posts: 110
Joined: Wed Sep 30, 2020 10:11 pm

Re: Glycine Amphoteric

Postby Racquel Fox 2I » Sat Dec 12, 2020 3:12 pm

Sana Nagori 2J wrote:I think because if oxygen donated a pair it would end up with a positive formal charge and oxygens do not want that.


Why would N want a +1 charge thought?

Sana Nagori 2H
Posts: 149
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Re: Glycine Amphoteric

Postby Sana Nagori 2H » Tue Dec 15, 2020 3:51 pm

Racquel Fox 3L wrote:
Why would N want a +1 charge thought?


It's not that N would WANT a +1 charge but more that oxygen really doesn't want one.


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