In the following reaction, a chromium complex is formed during the Étard reaction:

enter image description here

I have the following questions:

  1. How is this complex formed?
  2. How does its hydrolysis take place? (What's the mechanism?)

Wikipedia gives a different mechanism for the same reaction. I am in doubt which is correct? enter image description here

@Jan is this the correct mechanism?

enter image description here

  • $\begingroup$ Wikipedia’s mechanism is basically the same. $\endgroup$
    – Jan
    Commented Sep 3, 2016 at 9:11
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    $\begingroup$ How ? There is disubstitution in book and mono substitution on Wikipedia. I am unable to figure out how after disubstitution hydrolysis takes place? I understand hydrolysis when monosubstituted. $\endgroup$
    – JM97
    Commented Sep 3, 2016 at 9:13
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    $\begingroup$ @Jan I am uploading the picture of hydrolysis please check it in the answers column. $\endgroup$
    – JM97
    Commented Sep 3, 2016 at 10:21
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    $\begingroup$ Pretty much what I would assume, yes. $\endgroup$
    – Jan
    Commented Sep 4, 2016 at 21:20
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    $\begingroup$ Does this answer your question? Mechanism of toluene oxidation with CrO3 $\endgroup$ Commented May 5, 2021 at 15:54