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Topic: Tertiary alcohols oxidation  (Read 5946 times)

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Offline Rutherford

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Tertiary alcohols oxidation
« on: February 02, 2013, 08:55:59 AM »
When an tertiary alcohol gets oxidized under extreme conditions, are all 3 C-C bonds cleveaged?
For example, if R1R2R3C-OH gets oxidized are R1COOH, R2COOH, R3COOH and HCOOH the products?

Offline discodermolide

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Re: Tertiary alcohols oxidation
« Reply #1 on: February 02, 2013, 08:59:22 AM »
No I don't think so.
What conditions have you in mind?
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Offline Schrödinger

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Re: Tertiary alcohols oxidation
« Reply #2 on: February 02, 2013, 09:20:22 AM »
I think these are murky waters. When the oxidant is so powerful that it can break the adjacent bonds, I think one can expect a variety of products and not just one or two. Right?
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Offline discodermolide

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Re: Tertiary alcohols oxidation
« Reply #3 on: February 02, 2013, 09:28:37 AM »
I think you will get water and isobutene.
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Offline Rutherford

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Re: Tertiary alcohols oxidation
« Reply #4 on: February 02, 2013, 10:10:05 AM »
I think these are murky waters. When the oxidant is so powerful that it can break the adjacent bonds, I think one can expect a variety of products and not just one or two. Right?
That's why I wrote all the acids for example. Maybe some ketones would be produced and cleavaged, too.

I think you will get water and isobutene.

That would be reduction, I think.
All in all, I guess that a complex mixture will be made. Thanks.

Offline willug

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Re: Tertiary alcohols oxidation
« Reply #5 on: February 02, 2013, 04:03:54 PM »
'Oxidation under extreme conditions?' Do you just mean burning it?? In that case CO2 and water if you do a good enough job :p

Offline souro10

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Re: Tertiary alcohols oxidation
« Reply #6 on: February 03, 2013, 06:12:22 AM »
Well, it really depends on the method of oxidation i.e. how drastic the " extreme conditions " are.

For example, tertiary butyl alcohol in presence of copper catalyst at 300 degrees C produces isobutene.
But not all alcohols can tolerate this temperature. And a mixture of products are obtained.

Hence oxidation of tertiary alcohols do not have any synthetic utility; at least I cannot think of any.

Offline willug

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Re: Tertiary alcohols oxidation
« Reply #7 on: February 03, 2013, 12:08:56 PM »
'That would be reduction, I think'

I don't think dehydration is either... Alkenes and alcohols are considered to be at the same 'oxidation level'.

Offline souro10

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Re: Tertiary alcohols oxidation
« Reply #8 on: February 03, 2013, 02:29:24 PM »
Alkenes and alcohols are not at the same oxidation level.

Conversion of tertiary butyl alcohol to isobutene is technically called reduction.

I cited this example because if you pass ethanol vapours over heated Copper catalyst you get ethanal( by dehydrogenation) , but in case of a tertiary alcohol, you get alkene.

I think the question posted is way too general. It depends on the particular drastic method of oxidation used.

Offline willug

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Re: Tertiary alcohols oxidation
« Reply #9 on: February 03, 2013, 06:07:27 PM »
This is the first result on google (for me anyway) for 'oxidation level';

http://classes.yale.edu/01-02/chem220a/studyaids/oxidationlevel/oxidationlevel.html






Offline sjb

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Re: Tertiary alcohols oxidation
« Reply #10 on: February 04, 2013, 02:15:56 AM »
Alkenes and alcohols are not at the same oxidation level.

Conversion of tertiary butyl alcohol to isobutene is technically called reduction.

I cited this example because if you pass ethanol vapours over heated Copper catalyst you get ethanal( by dehydrogenation) , but in case of a tertiary alcohol, you get alkene.

I think the question posted is way too general. It depends on the particular drastic method of oxidation used.

That's possibly a change of mechanism. Are you agreed that hydration is not oxidation?

Offline souro10

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Re: Tertiary alcohols oxidation
« Reply #11 on: February 05, 2013, 07:50:38 AM »
Alkenes and alcohols are not at the same oxidation level.

Conversion of tertiary butyl alcohol to isobutene is technically called reduction.

I cited this example because if you pass ethanol vapours over heated Copper catalyst you get ethanal( by dehydrogenation) , but in case of a tertiary alcohol, you get alkene.

I think the question posted is way too general. It depends on the particular drastic method of oxidation used.

That's possibly a change of mechanism. Are you agreed that hydration is not oxidation?

Yes, I was wrong. Thank you

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