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Related Concept Videos

Structures of Carboxylic Acid Derivatives01:28

Structures of Carboxylic Acid Derivatives

Structure of Carboxylic Acid Derivatives
Carboxylic acid derivatives contain an acyl group attached to a heteroatom such as chlorine, oxygen, or nitrogen. The carbonyl carbon and oxygen are both sp2-hybridized with an unhybridized p orbital.
The three sp2 orbitals of the carbonyl carbon form three σ bonds, one each with the carbonyl oxygen, the α carbon, and the heteroatom, whereas the other two sp2 orbitals of the carbonyl oxygen are occupied by the lone pairs. Further, the unhybridized p...
Physical Properties of Carboxylic Acid Derivatives01:19

Physical Properties of Carboxylic Acid Derivatives

Intermolecular forces dictate several physical properties such as boiling points, melting points, solubilities, and so forth. They are classified into four types: ionic forces, hydrogen bonds, dipole–dipole forces, and dispersion forces. Ionic forces are the strongest, while dispersion forces are the weakest.
Among the carboxylic acid derivatives, the boiling points of acid chlorides and esters are very similar and are the lowest in the series. Acid anhydrides have slightly higher boiling...
Nitriles to Carboxylic Acids: Hydrolysis01:08

Nitriles to Carboxylic Acids: Hydrolysis

Nitriles undergo acid-catalyzed hydrolysis or base-catalyzed hydrolysis to form a carboxylic acid. These reactions proceed via an amide intermediate.
Preparation of Nitriles01:12

Preparation of Nitriles

One of the common methods to prepare nitriles is the dehydration of amides. This method requires strong dehydrating agents like phosphorous pentoxide or boiling acetic anhydride for converting amides to nitriles. Another reagent namely, thionyl chloride also accomplishes the dehydration of amides, where amide acts as a nucleophile. The first step of the mechanism involves the nucleophilic attack by the amide on the thionyl chloride to form an intermediate. In the next step, the electron pairs...
Acidity and Basicity of Carboxylic Acid Derivatives01:25

Acidity and Basicity of Carboxylic Acid Derivatives

Carboxylic acids are the strongest among organic acids, as they readily lose the hydroxyl proton to form a resonance-stabilized carboxylate ion. In comparison, the acid derivatives lack acidic hydrogens directly attached to a functional group. In these compounds, the acidic nature arises from their ability to lose α hydrogens, making them weakly acidic.
The relative acidic strength of the derivatives can be explained based on the extent of resonance stabilization of the conjugate base. The...
Preparation of Carboxylic Acids: Hydrolysis of Nitriles01:19

Preparation of Carboxylic Acids: Hydrolysis of Nitriles

Nitriles (R–CN) can be converted into carboxylic acids (R–COOH) upon treatment with aqueous acids, i.e., upon hydrolysis of nitriles. Under base-catalyzed conditions, carboxylate anions (R–COO−) are formed.

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Updated: Jul 16, 2026

Green Synthesis of Quinoline-Based Ionic Liquid
05:59

Green Synthesis of Quinoline-Based Ionic Liquid

Published on: September 27, 2024

Physicochemical properties of nitrile-functionalized ionic liquids.

Qinghua Zhang1, Zuopeng Li, Juan Zhang

  • 1Centre for Green Chemistry and Catalysis, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P. R. China.

The Journal of Physical Chemistry. B
|March 29, 2007
PubMed
Summary

Introducing nitrile-functionalized ionic liquids (ILs) with modified cations and anions. These novel ILs exhibit significantly altered physicochemical properties due to the nitrile group

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Physical Chemistry

Background:

  • Ionic liquids (ILs) are versatile solvents with tunable properties.
  • Nitrile functionalization offers a route to modify IL behavior.
  • Understanding structure-property relationships is crucial for IL design.

Purpose of the Study:

  • To synthesize and characterize novel nitrile-functionalized ionic liquids.
  • To comparatively investigate the impact of nitrile groups on IL properties.
  • To elucidate the underlying mechanisms for observed property changes.

Main Methods:

  • Synthesis of imidazolium, pyridinium, and quaternary ammonium cations with nitrile groups.
  • Use of various anions including chloride, tetrafluoroborate, and bis(trifluoromethanesulfonyl)imide.
  • Comprehensive characterization of physicochemical properties (spectroscopic, thermal, solubility, surface, electrochemical, tribological, toxic).

Main Results:

  • Successful preparation and characterization of a series of nitrile-functionalized ILs.
  • Demonstrated significant alterations in spectroscopic, thermal, solubility, surface, electrochemical, tribological, and toxic properties.
  • Observed property changes are attributed to conformational modifications and enhanced hydrogen bonding.

Conclusions:

  • Nitrile functionalization is an effective strategy to tune ionic liquid properties.
  • Conformational changes and hydrogen bonding play key roles in property modulation.
  • These findings provide insights for designing tailored ionic liquids for specific applications.