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June 06, 2025, 04:45:48 am
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Author Topic: CONDENSATION-POLYMERISATION  (Read 1528 times)  Share 

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kenhung123

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CONDENSATION-POLYMERISATION
« on: May 09, 2010, 08:28:03 pm »
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Does the oxygen in water have to be from the hydroxyl or caroxyl group? Or is it a totally random process?
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stonecold

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Re: CONDENSATION-POLYMERISATION
« Reply #1 on: May 09, 2010, 08:32:32 pm »
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I don't think it really matters, but if you want to get technical, then I believe it is from the carboxyl group.
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superflya

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Re: CONDENSATION-POLYMERISATION
« Reply #2 on: May 09, 2010, 08:33:48 pm »
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i dont think this really matters but id say the OH comes from the hydroxyl and the H from the carboxyl. leaving u with the ester linkage (COO).

>.>
« Last Edit: May 09, 2010, 08:35:48 pm by superflya »
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stonecold

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Re: CONDENSATION-POLYMERISATION
« Reply #3 on: May 09, 2010, 08:35:37 pm »
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haha, we both said a different thing.  :P

I'm just saying what my teacher told me...
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Mao

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Re: CONDENSATION-POLYMERISATION
« Reply #4 on: May 09, 2010, 08:36:59 pm »
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OH comes from the carboxyl. But this mechanism is beyond VCE, so don't worry about it.
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superflya

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Re: CONDENSATION-POLYMERISATION
« Reply #5 on: May 09, 2010, 08:38:24 pm »
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lol yea i had no idea anyway :P
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Re: CONDENSATION-POLYMERISATION
« Reply #6 on: May 09, 2010, 08:40:43 pm »
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stonecold

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Re: CONDENSATION-POLYMERISATION
« Reply #7 on: May 09, 2010, 08:43:56 pm »
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Just remember that carboxyl has 2 oxygens, and hydoxyl only has 1.

It is only fair that in the end they have 1 each. :P
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physics

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Re: CONDENSATION-POLYMERISATION
« Reply #8 on: May 09, 2010, 08:44:11 pm »
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OH from hyrdoxyl and the H from carboxyl
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Re: CONDENSATION-POLYMERISATION
« Reply #9 on: May 09, 2010, 08:49:24 pm »
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Quote from: annahinh on May 09, 2010, 08:44:11 pm
OH from hyrdoxyl and the H from carboxyl

mao just corrected that ahah
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Re: CONDENSATION-POLYMERISATION
« Reply #10 on: May 09, 2010, 08:51:22 pm »
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Could you just imagine a question on this.  It would be like:

In a condensation reaction between a carboxylic acid and an alkanol, water is formed.  The oxygen in the water has come from:

a) the carboxylic acid
b) the alkanol
c) either the carboxylic acid or the alkanol as the reaction is random
d) the molecule with the lowest molecular weight

haha!
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physics

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Re: CONDENSATION-POLYMERISATION
« Reply #11 on: May 09, 2010, 08:53:40 pm »
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Quote from: superflya on May 09, 2010, 08:49:24 pm
Quote from: annahinh on May 09, 2010, 08:44:11 pm
OH from hyrdoxyl and the H from carboxyl

mao just corrected that ahah
serious? teacher told us it had to be like this XD
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happyhappyland

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Re: CONDENSATION-POLYMERISATION
« Reply #12 on: May 09, 2010, 08:55:04 pm »
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The O comes from the carboxy thats what I thought. WHen you form an amide group in proteins, it becomes NH-C=O and the OH is gone from the carboxy...
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kenhung123

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Re: CONDENSATION-POLYMERISATION
« Reply #13 on: May 09, 2010, 08:58:56 pm »
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Coz in different textbooks they tend to highlight the O from different functional groups (jumping between hydroxy and carboxy)
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superflya

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Re: CONDENSATION-POLYMERISATION
« Reply #14 on: May 09, 2010, 09:07:10 pm »
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Quote from: kenhung123 on May 09, 2010, 08:58:56 pm
Coz in different textbooks they tend to highlight the O from different functional groups (jumping between hydroxy and carboxy)

yea it really doesnt matter.
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