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![[Post New]](/templates/default/images/icon_minipost_new.gif) 2 Apr 2008 08:38:58 IST
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what is the mechanism involved in riemer tieman reaction for formation of salicylic acid?
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2 Apr 2008 08:42:19 IST
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Im absolutely at a loss to explain why people here give questions that can be easily answered by a search??? Dont they know that a site called wikipedia.org exists? dont they know google? well if you dont, plz know now atleast. See here for the mechanism |
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2 Apr 2008 09:00:52 IST
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well i ask 4 the mechanism which involves formation of salicylic acid and not salicylaldehde
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2 Apr 2008 09:03:14 IST
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excuse me, but the logical steps are the same ;) Except the electrophile ofc
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2 Apr 2008 09:07:16 IST
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well then you plz tel me the electrphyll coz i have the mechanism of rection to get salicylaldehyde
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2 Apr 2008 09:13:20 IST
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Actually here, the pi bond shiftes and gets attached to the C of CCl4 and a Cl- escapes out making it a CCl3 and a H in the ortho posn to C=O of the phenol group due to resonance., then a H leaves from the ortho position to make it O- and CCl3 in the ortho posn only. After this its the same :)
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2 Apr 2008 09:28:35 IST
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Chloroform reacts with strong base to form the chloroform carbanion (2),which will quickly  -eliminate to give dichloro carbene (3).
Dichlorocarbene will react in the ortho- and para- position of the phenate (5) to give the dichloromethyl substituted phenol (7).After basic hydrolysis,the desired product (9) is formed.
Hope you find it useful. This answer has been taken from the link provided by @sandeepramesh.
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2 Apr 2008 13:58:01 IST
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d electro phile is actually CCl2 : dis was d quesn asked in IIT JEE2007 refer it
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2 Apr 2008 13:58:54 IST
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that one will be for salicylaldehyde :)
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