Originally, the compound betaine,
(CH3)3N+–CH2C(=O)O−N,N,N-trimethylammonioacetate, and similar zwitterionic compounds derived from other amino
acids. By extension, neutral molecules having charge-separated forms with an
onium atom which bears no hydrogen atoms and that is not adjacent to the anionic atom.
Betaines cannot be represented without formal charges. E.g.
Source:
PAC, 1995, 67, 1307
(Glossary of class names of organic compounds and reactivity intermediates based on
structure (IUPAC Recommendations 1995))
on page 1322
InChI=1/C5H11NO2/c1-6(2,3)4-5(7)8/h4H2,1-3H3
InChI=1/C20H19OP/c21-16-17-22(18-10-4-1-5-11-18,19-12-6-2-7-13-19)20-14-8-3-9-15-20/h1-15H,16-17H2
InChI=1/C4H11O3PS/c1-8(2,3)4-9(5,6)7/h4H2,1-3H3
KWIUHFFTVRNATP-UHFFFAOYAI
AFIJGVRRUMMOOG-UHFFFAOYAQ
PWUYMNVXKOWYAD-UHFFFAOYAI
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.
