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Author: Subject: propanoyl chloride or ?
popi
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[*] posted on 12-12-2012 at 16:48
propanoyl chloride or ?


What is this called now as it has had many names in the past? Is this the same as Propionyl chloride 79-03-8?And if the same what would be the way that it would be made? ',nowadays.tnks!
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ScienceSquirrel
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[*] posted on 13-12-2012 at 05:47


It is the same thing.
The best way to make it it to add thionyl chloride to propionic acid in a hood, lots of sulphur dioxide and hydrogen chloride are produced.
Then distill the product.
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chemrox
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[*] posted on 13-12-2012 at 16:55


Another way is to mix equivalents of propionic acid and benzoyl chloride (Brown was the author). You simply distill off the propionyl chloride. You get a bunch of benzoic acid as the byproduct. You can recrystallize these from water. It's a very efficient conversion and you don't need to do it in the hood.



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UnintentionalChaos
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[*] posted on 13-12-2012 at 17:14


Propionyl Chloride boils at 77C. Using thionyl chloride, which boils at 75C and produces lots of gas to carry off vapor from your product isn't going to work.

You need a "heavy" chlorinating agent where you can distill your product off from the residue. PCl5, benozyl chloride, benzotrichloride, triphenylphosphine dichloride, and others would work better.

[Edited on 12-14-12 by UnintentionalChaos]




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HOLYMOLYBDENUM
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[*] posted on 10-4-2013 at 18:52


Would a catalyst (such as stannic chloride) be required to do the reaction between propanoic acid and benzoyl chloride?
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