This question already has an answer here:

I've determined the chemical equations for both the mechanisms, but I'm unable to draw curly arrow diagrams for the two reactions using potassium dichromate as the oxidising reagent. I'm not sure how to go about doing this, and I can't seem to find anything online related to do this.

From what I've studied, oxidation of primary alcohol to aldehyde:

$$\ce{3CH3CH2OH + Cr2O7^2- + 8 H+ -> 3CH3CHO + 2 Cr^3+ + 7 H2O}$$

and, oxidation of primary alcohol to carboxylic acid:

$$\ce{3CH3CH2OH + 2Cr2O7^2- + 16 H+ -> 3CH3COOH + 4 Cr^3+ + 11 H2O}$$

I've found information pertaining to drawing curly arrow diagrams for the oxidation of secondary alcohols to ketones, but I'm unable to apply the same to my query.


marked as duplicate by Mithoron, Todd Minehardt, A.K., andselisk, Tyberius Mar 22 at 15:29

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

  • $\begingroup$ What was the oxidation agent in the examples? Could you draw curly arrows for the reaction $\ce{CH3CH2OH -> CH3CHO + H- + H+}$? Or $\ce{CH3CH2OH + O2 -> CH3COOH + H2O}$? That way, you would not have to deal with the chromium chemistry and still see what is going on with the functional groups. $\endgroup$ – Karsten Theis Mar 21 at 16:03
  • 1
    $\begingroup$ Do the same thing with the primary alcohol as you would for the secondary alcohol. As for the aldehyde, hydrate it first and then proceed. $\endgroup$ – user55119 Mar 21 at 16:26
  • $\begingroup$ chemistry.stackexchange.com/questions/49542/… $\endgroup$ – Mithoron Mar 21 at 23:51