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Organic Chemistry

Blazing goIITian

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3 Oct 2009 19:32:08 IST

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what is the priority order in IUPAC naming of organic chemsitry

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what is the priority order in IUPAC naming of organic chemsitry

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Jabroo !!

Blazing goIITian

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3 Oct 2009 19:48:22 IST

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sm1 pls answer

ruchika

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3 Oct 2009 19:48:23 IST

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in functional groups?or any thing else?

Jabroo !!

Blazing goIITian

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3 Oct 2009 19:50:48 IST

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YES IN FUNCTIONAL GROUP

ruchika

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3 Oct 2009 19:52:27 IST

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When an organic compound contains two or more functional groups one group is called the principal functional group while the others are called the secondary functional groups and are treated as substituents: The order of preference for principal group is: Carboxylic acid > acid anhydrides > esters > acid halides > amides > nitrites > aldehydes > ketone > alcohols > amines > double bond > triple bond (When the functional groups act as substituents)

ruchika

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3 Oct 2009 19:53:28 IST

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1) Find the parent hydrocarbon. This is based on the longest continuous carbon chain. If there are chains of equivalent length, then select the one with the most branch points as the parent. 2)Number the atoms in the parent chain, beginning at the end nearer the first branch point. If there is branching an equal distance from both ends, then consider the next branch point (repeat as required). 3) Identify and number the substituents. Remember there must be as many numbers as there as substitutents. 4) Write out the name as a single word, using hyphens to separate the different prefixes and commas to separate the numbers. If two or more different substitutents are present, cite them in alphabetical order. With identical substituents, use the prefix di-, tri-, tetra- etc. as required. Ignore these prefixes when alphabetising. * If a substituent has subranching (ie. its complex) then reapply the first 4 steps as if it were a compound. Numbering must begin at the point of attachment. Now set this substituent in parentheses.

djdylan2000. bits goa eee

Blazing goIITian

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3 Oct 2009 20:10:35 IST

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In org, our sir had taught us d song for priority of funct groups:

Carboxylic sulphonic anhydride celebrated easter with halide and amide. Nitrile and aldehyde could not attend because ketone consumed alcohol and shouted mi ke ky

therefore in decreasing priority

Carboxylic acid

Sulphonic Acid

Acid Anhydride

Ester (from 'easter' in the song)

Acid Halide

Amide

Nitrile

Aldehyde

Ketone

Alcohol

amines

alkenes

alkynes

Hope u get it :)

Jabroo !!

Blazing goIITian

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3 Oct 2009 20:13:44 IST

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thanks a lot didylan...realy helpful

ruchika

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4 Oct 2009 12:12:29 IST

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hey if u use ncert book then carboxilic acid has more priority than sulhonic acid ......other wise according to new priority sulhonic acid has more priority than COOH

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