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So my professor for organometallic chemistry described the different mechanisms for oxidative addition and in talking about the concerted mechanism he said that it had first order kinetics. I find this very odd as no step in the mechanism seems to involve a single reactant, so it doesn't seem like the rate-determining step could possibly be one with only one molecule.

I have included a picture of the mechanism shown on his slides. Is he correct in saying that it is first-order? Or am I missing something?

enter image description here

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  • $\begingroup$ There isn’t really a single mechanism of oxidative addition (or may not always even be a single step). I’d depends on the oxidation state of the metal, the polarity of the ligand being inserted, the coordination geometry etc. $\endgroup$
    – NotEvans.
    Jun 20, 2021 at 8:14
  • $\begingroup$ Did your professor say first order overall, or did he say first order in metal complex reactant ? $\endgroup$
    – S R Maiti
    Jun 20, 2021 at 9:12

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