Definitions for vicinalˈvɪs ə nl
This page provides all possible meanings and translations of the word vicinal
Random House Webster's College Dictionary
vic•i•nalˈvɪs ə nl(adj.)
of, pertaining to, or belonging to a neighborhood or district.
noting a crystal plane whose position varies very little from that of a fundamental plane of the form.
Origin of vicinal:
1615–25; < L vīcīnālis, der. of vīcīn(us) near; see vicinity
belonging to or limited to a vicinity
Of or pertaining to a neighborhood; neighboring.
Describing identical atoms or groups attached to nearby (especially adjacent) atoms in a molecule.
Origin: From vicinalis.
In chemistry vicinal stands for any two functional groups bonded to two adjacent carbon atoms. For example the molecule 2,3-dibromobutane carries two vicinal bromine atoms and 1,3-dibromobutane does not. Likewise in a gem-dibromide the prefix gem, an abbreviation of geminal, signals that both bromine atoms are bonded to the same atom. For example, 1,1-dibromobutane is geminal. Like other such concepts as syn, anti, exo or endo, the description vicinal helps explain how different parts of a molecule are related to each other either structurally or spatially. The vicinal adjective is sometimes restricted to those molecules with two identical functional groups. The term can also be extended to substituents on aromatic rings.
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