Topic: Functional Groups in MSG (Read 6959 times)

whitfi51 · « **on:** November 10, 2012, 06:02:26 PM »

I think MSG has three functional groups but can anyone tell me for sure?
I'm thinking it is an amine (NH2), a Ketone (the double bonded O next to the other O), and an Aldehyde (the double bonded O next to the alcohol).

You can see a picture of it on wikipedia
http://en.wikipedia.org/wiki/Monosodium_glutamate

Dan · « **Reply #1 on:** November 10, 2012, 06:10:19 PM »

There is an amine, but ketones are CC(O)C, aldehydes are CC(O)H.

CC(O)O is an entirely different functional group - hint: acetic acid.

whitfi51 · « **Reply #2 on:** November 10, 2012, 06:18:43 PM »

Woops that's a carboxylic acid there with the OH. So is the side with just the O- anything special or are there just two functional groups then?

discodermolide · « **Reply #3 on:** November 10, 2012, 06:32:00 PM »

Well the side with the O^- is there for a reason, any idea what it is?

whitfi51 · « **Reply #4 on:** November 10, 2012, 10:18:13 PM »

It's also a carboxylic acid, it's just undergone a reaction with the sodium. So there is two unique functional groups

discodermolide · « **Reply #5 on:** November 11, 2012, 12:04:50 AM »

It's actually the sodium salt of the carboxylic acid. And it is there to increase the water solubility of the glutamic acid.

Dan · « **Reply #6 on:** November 11, 2012, 05:02:29 AM »

Quote from: whitfi51

It's also a carboxylic acid

Not quite. The sodium salt of acetic acid is called sodium acetate, so what do you think you call the sodium salt of a general carboxylic acid?

Topic: Functional Groups in MSG (Read 6959 times)

whitfi51

Functional Groups in MSG

Dan

Re: Functional Groups in MSG

whitfi51

Re: Functional Groups in MSG

discodermolide

Re: Functional Groups in MSG

whitfi51

Re: Functional Groups in MSG

discodermolide

Re: Functional Groups in MSG

Dan

Re: Functional Groups in MSG

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