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Topic: Identification of carbonyl compound preparing its derivatives  (Read 5741 times)

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Offline angelku

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Identification of carbonyl compound preparing its derivatives
« on: October 21, 2007, 06:07:02 AM »
1. A sample which is composed of many aldehydes and ketones,why it is inappropriate to use it directly to react with 2,4-dinitrophenylhydrazine to identify its component ?

2.Why using fractional distillation is not suitable for identification of its component?

3.What method is suitable to identify the given compound?
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Offline agrobert

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Re: Identification of carbonyl compound preparing its derivatives
« Reply #1 on: October 21, 2007, 01:51:31 PM »
1. Do you understand the DNP mechanism? Derivatives are only useful if they have been previously synthesized and reported in literature.  Think about what wold happen to a compound with multiple aldehydes or ketone functional groups.
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In the realm of scientific observation, luck is only granted to those who are prepared. -Louis Pasteur

Offline angelku

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Re: Identification of carbonyl compound preparing its derivatives
« Reply #2 on: October 23, 2007, 05:38:47 AM »
I don't know about the DNP mechanism.I only know that both of aldehyde and ketone are structual isomer and have reaction with 2,4-dinitrophenylhydrazine
to form2,4-dinitrophenylhydrazones. Is there anyone can help me?
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