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An electrically neutral entity consisting of more than one atom (n > 1). Rigorously, a molecule, in which n > 1 must correspond to a depression on the potential energy surface that is deep enough to confine at least one vibrational state. This tag should be applied to question about certain molecules or a class of them.

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CHFClBr, CHClBrI are examples. You can substitute hydrogen atoms with halogen atoms by radical halogenation reactions.
answered Aug 9 by Lemoine