Exceptions. The expected names, bismane, oxane, thiane, selenane, tellurane and polonane are Hantzsch-Widman names for heteromonocyclic rings (see R-2.3.3).
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(Recommendations 1993), 1993, Blackwell Scientific publications, Copyright 1993 IUPAC]. If you need to cite these rules please quote this reference as their source.
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