Quaternary ammonium cation - Wikipedia
In organic chemistry, quaternary ammonium cations, also known as quats, are positively-charged polyatomic ions of the structure [NR4]+, where R is an alkyl group, an aryl group [1] or organyl group.
Quaternary Ammonium Compounds: A Chemical Class of …
2023年5月9日 · Studies performed mainly on model QAC compounds (typically tetraalkyl ammonium compounds) suggest that several transporters, including P-glycoprotein (P-gp), organic cation transporters (OCTs), and thiamine transporters (ThTRs), may contribute to QAC disposition in the human body.
Quaternary Ammonium Compounds: Simple in Structure, …
2019年5月6日 · Quaternary ammonium compounds, referred to as QACs, are cationic substances with a structure on the edge of organic and inorganic chemistry and unique physicochemical properties. The purpose of the present work is to introduce QACs and …
Quaternary Ammonium Salts: Preparation, Application
2023年11月8日 · Quaternary ammonium salts are chemical compounds with the formula NR +4 X –, where R is an alkyl or aryl group and X is an anion (typically a halide ion). The quaternary ammonium cations are always positively charged. In aliphatic salt, the central nitrogen atom is substituted with alkyl or alkyl aryl groups.
Quaternary ammonium cation - wikidoc
Quaternary ammonium cations, also known as quats, are positively charged polyatomic ions of the structure NR 4 + with R being alkyl groups. Unlike the ammonium ion NH 4 + itself and primary, secondary, or tertiary ammonium cations, the quaternary ammonium cations are permanently charged, independent of the pH of their solution.
Quaternary compound - Wikipedia
In another use of the term in organic chemistry, a quaternary compound is or has a cation consisting of a central positively charged atom with four substituents, especially organic (alkyl and aryl) groups, discounting hydrogen atoms. [1] The best-known quaternary compounds are quaternary ammonium salts, having a nitrogen atom at the center. [2]
What are Quaternary Ammonium Compounds? - NPIC
2023年5月4日 · Quaternary ammonium cation general structure. "R" is any cluster of atoms. Group I quats are called "didecyl dimethyl ammonium chloride", or DDAC for short. These are the simplest quats that have straight chains of carbon atoms attached to the nitrogen (Figure 2).
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