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Organic Chemistry.

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Organic Chemistry.

Post  Pinakstk on Sat Dec 04, 2010 12:31 pm

When propanal is prepared from propan-1-ol, the mixture is kept at a temperature between the boiling temperatures of propanal and propan-1-ol. Explain why this is necessary?

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unwanted oxidation

Post  Thesci3141 on Mon Dec 27, 2010 11:26 pm

Propanel (propionaldehyde) the product of the reaction of propan 1-ol (1-propyl alcohol and certain oxidizers with acidified K2CRO3 boils at about half the temp. of the alcohol. The dichromate in the reaction mixture can further oxidize the aldehyde to a carboxylic acid. Therefore,Simply distill the aldehyde out as it is formed! There are other ways,Think PCC.

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