vicinal

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vicinal

[′vis·ən·əl]
(organic chemistry)
Referring to neighboring or adjoining positions on a carbon structure (ring or chain).
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The preponderance of vicinally unsubstituted compounds among the congeners whose relative proportions declined between 1981 and 1991 suggests that these changes may result from metabolic degradation (via hydroxylation) rather than from changing inputs of PCBs.