Unlike simple amphoteric compounds that may only form " either " a cationic or anionic species, a zwitterion simultaneously has both ionic states.
12.
When the N-substituent is an electron-withdrawing group such as a tosyl group, the carbon-nitrogen bond breaks, forming another zwitterion
13.
In fact, the addition of acid ( H + ) or hydroxide ( OH-) acts to attenuate protodeboronation by shifting the speciation away from the reactive zwitterion.
14.
It seems to me that well, lithium aluminum hydride will react with the zwitterion three times before it actually does a reduction, and then it has to reduce the resulting aldehyde again!
15.
Another scheme uses a strong organo-lewis acid such as B ( C 6 F 5 ) 3 as a cocatalyst to activate polymerization through methyl abstraction thereby producing a highly reactive zwitterion form.
16.
"Kosower's "'Z "'scale " measures polarity in terms of the influence of the solvent on UV-absorption maxima of a salt, usually pyridinium iodide or the pyridinium zwitterion.
17.
Arsanilic acid occurs as a zwitterion, H 3 N + C 6 H 4 AsO 3 H & minus;, yet is typically represented with the non-zwitterionic formula H 2 NC 6 H 4 AsO 3 H 2.
18.
I was trying to understand the : File : Glycine-zwitterion-2D-skeletal . png variant of Glycine but then I realized that : File : Glycerin Skelett . svg might be subject to the same hydrogen bond position transition.
19.
In crystalline form, and in solution under very acidic conditions ( low pH ), the compound exists as a zwitterion as in the structure shown above, with the sulfate group negatively charged, and the ketone group carrying an additional proton.
20.
Like other amino acids, tryptophan is a zwitterion at physiological pH where the amino group is protonated ( NH 3 +; pK a = 9.39 ) and the carboxylic acid is deprotonated ( COO "; pK a = 2.38 ).
