structure How would you name this compound?

4-bromo-2-methylpentan-3-one or 2-bromo-4-methylpentan-3-one


1 Answer 1


It should be named as 2-bromo-4-methylpentan-3-one

The alphabatical order should be followed while naming this compound. As b in bromo comes before m in methyl, it should be named as above.

See here and here for more information.

  • $\begingroup$ Do halogen and alkyl group have the same priority? I was confused since my teacher said alkane comes before halide in the order of precedence. $\endgroup$
    – Raknos13
    Jul 11, 2017 at 16:36
  • $\begingroup$ It depends on the type of group present. For e.g. Between ethyl and iodo, ethyl will have more priority according to alphabatical order. See the links for more info. $\endgroup$
    – Mesentery
    Jul 11, 2017 at 16:52
  • 1
    $\begingroup$ @mettledmike Also see this answer. $\endgroup$
    – Mesentery
    Jul 11, 2017 at 17:35

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