These functional groups can exist as cation, zwitterion
or anion species, depending on the pH of the solution .
It exists as zwitterion
in the pH conditions of small intestine.
Hydroperoxide 21 is also a known product of the singlet oxygen-mediated oxidation of tryptophan, and it gets converted via its hydroperoxide isomer 22, zwitterion
23, and dioxetane 24 to N-formylkynurenine 25 [34, 55].
The results of previous works reveal that the zwitterion
mechanism developed by Caplow  and Danckwerts  is acceptable for this reaction :
For clays modified with zwitterion
, nonionic and anionic surfactants (TMG, HEC, TRITON X-100, LABSA and SLES), it was seen that the liquid limit and plasticity index increased when surfactant percentage was increased.
First step is a 1,3 dipolar cycloaddition of ozone to the olefin leading to the malozonide (1) (Criegee intermediate), which is very unstable and decomposes to give a zwitterion
(2) and a carbonyl compound (3) In the presence of reactive solvent, such as water or alcohol, the zwitterion
interact with the solvent to give hydroperoxides (4) in high yield, since the concentration of the solvent far exceeds that of any other substances with which the zwitterion
The molecule tends to exist as a zwitterion
where a phosphonic hydrogen dissociates and joins the amine group.
The newly developed liquid crystals contain a zwitterion
made up of a negatively charged inorganic portion and a positively charged organic portion.
In vitro evaluation of zwitterion
buffers in diluents for freezing ram spermatozoa.
2] with primary and secondary alkanolamines with the zwitterion
Ion-pairing with acidic dyes under the described conditions is less likely because the carboxy metabolite is a zwitterion
The nonstereospecificity and methanol adducts observed during the reaction of MTAD with the Z,Z isomer suggest the involvement of an open zwitterion