Generic name for anions containing an even number of electrons and having an unshared
pair of electrons on a tervalent carbon atom (e.g.
Cl3C−
or
HC≡C−
) or — if the ion is mesomeric (see
mesomerism) — having at least one significant
contributing structure with an unshared pair of electrons on a tervalent carbon atom, for example:
Source:
PAC, 1994, 66, 1077
(Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994))
on page 1092
See also:
PAC, 1995, 67, 1307
(Glossary of class names of organic compounds and reactivity intermediates based on
structure (IUPAC Recommendations 1995))
on page 1324
InChI=1/C5H8O2/c1-4(6)3-5(2)7/h3,6H,1-2H3/p-1/b4-3-/fC5H7O2/h6h/q-1
InChI=1/C5H7O2/c1-4(6)3-5(2)7/h3H,1-2H3/q-1
POILWHVDKZOXJZ-SEDPERACDS
CUJRVFIICFDLGR-UHFFFAOYAL
Cite as:
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.
https://doi.org/10.1351/goldbook.
