# How do aldehydes oxidize?

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#### Explanation

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anor277 Share
Mar 6, 2017

Usually very easily..........

#### Explanation:

$R C \left(= O\right) H \rightarrow R C \left(= O\right) O H$,

we can assign formal oxidation states to the ipso carbons:

$\text{Aldehyde,}$ $\text{C(+I) " rarr " Carboxylic acid}$ $\text{C(+III)}$

$R C \left(= O\right) H + {H}_{2} O \rightarrow R C {O}_{2} H + 2 {e}^{-} + 2 {H}^{+}$

Of course, we need some form of oxidizing agent. And this could be some form of chromic oxide - in my hands these have never worked as advertized. Usually the difficulty is at stopping at the aldehyde; oxidation to the carboxylic acid is the thermodynamic outcome.

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