The synthetic scheme below makes reference to a reagent $\ce{(CH_3)_3COCl}$ that is added at some points in the synthesis.

What kind of structure does $\ce{(CH_3)_3COCl}$ have? The closest structure I can imagine is that of $\ce{(CH_3)_3CCOCl}$ with an extra carbon for the 3 methyl groups to be attached to. $\ce{(CH_3)_3COCl}$ seems to imply that the 3 methyl groups are attached to the carbonyl carbon (which is impossible).

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Image source: IChO 2015, Problem 6

  • 2
    $\begingroup$ $\ce{Me3COCl}$ is possible but would require a chlorine-oxygen bond. Seems like a typo to me … $\endgroup$
    – Jan
    Sep 2, 2017 at 4:42

1 Answer 1


Tert-butyl hypochlorite, cas no 507-40-4

Reagent for N-chlorination of amines and amides


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