An affix used in names to denote meridional; three groups occupying vertices of an octahedral coordination
sphere in such a relationship that one is cis
to the two others which are themselves trans
, not now recommended for precise nomenclature purposes.
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8. doi:10.1351/goldbook