Chemical Structure / July 19, 2018 / Mckenna Osborn
by Gottlieb, Kotlyar, and Nudelman. By compiling the chemical shifts of a large number of contaminants commonly encountered in synthetic chemistry, the publica tion has become an essential reference, allowing for easy identification of known impurities in a variety of deuterated organic solvents.
The ammonium cation is a positively charged polyatomic ion with the chemical formula NH+4. It is formed by the protonation of ammonia (NH3). Ammonium is also a general name for positively charged or protonated substituted amines and quaternary ammonium cations (NR+4), where one or more hydrogen atoms are replaced by organic groups (indicated by R).
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