Amide Carbonyl
Amide Carbonyl - Related Videos
07:56
Determination of Carbonyl Functional Groups in Bio-oils by Potentiometric Titration: The Faix Method
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Cited by 5 •
2017
Here we present a potentiometric titration technique for accurately quantifying carbonyl compounds in pyrolysis bio-oils.
01:29
Preparation of Amides
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2023
Amides are synthesized by treating carboxylic acids with amines in the presence of dehydrating agents like dicyclohexylcarbodiimide (DCC). The DCC-promoted synthesis of amides begins with the protonation of DCC by carboxylic acid. The protonation makes it a better acceptor. Next, the addition of carboxylate to the protonated carbodiimide gives a reactive acylating agent. Subsequently, the amine acts as a nucleophile that attacks the acylating agent to form a tetrahedral intermediate. In the...
02:23
Alcohols from Carbonyl Compounds: Reduction
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2025
Reduction is a simple strategy to convert a carbonyl group to a hydroxyl group. The three major pathways to reduce carbonyls to alcohols are catalytic hydrogenation, hydride reduction, and borane reduction. Catalytic hydrogenation is similar to the reduction of an alkene or alkyne by adding H2 across the pi bond in the presence of transition metal catalysts like Raney Ni, Pd–C, Pt, or Ru. Aldehydes and ketones can be reduced by this method, often under mild to moderate heat (25–100°C) and...
01:18
Nucleophilic Addition to the Carbonyl Group: General Mechanism
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2023
The carbonyl carbon in an aldehyde or ketone is the site of a nucleophilic attack due to its electron-deficient nature. Depending on the strength of the incoming nucleophile, the reaction occurs via different mechanistic pathways. A stronger nucleophile can directly attack the electrophilic center, the carbonyl carbon. The HOMO orbital of the nucleophile interacts with the LUMO (π* antibonding) orbital present on the carbonyl carbon. This interaction breaks the π bond and shifts the π bonding...
01:19
Amines to Amides: Acylation of Amines
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2025
Various carboxylic acid derivatives (such as acid chlorides, esters, and anhydrides) can be used for the acylation of amines to yield amides. The reaction requires two equivalents of amines. The first amine molecule functions as a nucleophile and attacks the carbonyl carbon to produce a tetrahedral intermediate. This is followed by the loss of the leaving group and restoration of the C=O bond. Next, the second equivalent of amine serves as a Brønsted base and deprotonates the quaternary amide...
FAQs
Resonance donation makes the amide carbonyl less reactive toward attack at its carbonyl carbon than an aldehyde or ketone. The nitrogen lone pair shares electron density with the carbonyl system, lowering the carbonyl carbon’s electrophilicity, meaning its tendency to accept electron density. This reduced electrophilicity helps explain the relative stability of amide-containing structures in chemistry.
The carbon–nitrogen bond has partial double-bond character because the nitrogen lone pair contributes to the carbonyl system. A bond with this character does not rotate as freely as a typical single bond, so the amide group adopts more constrained geometries. This restricted rotation affects molecular shape and is especially important when interpreting the structures of peptides and proteins.
The amide carbonyl contributes to hydrogen-bonding patterns that help determine how molecules arrange themselves. Together with restricted carbon–nitrogen rotation, these interactions influence molecular shape and structural organization. In proteins, such effects help connect the local arrangement of peptide units with larger features of protein structure, making the carbonyl important beyond its immediate chemical reactivity.
Spectroscopic identification can use the characteristic carbonyl feature associated with an amide functional group. Recognizing this feature helps distinguish amide-containing compounds and supports structural analysis of peptides, proteins, polymers, and pharmaceuticals. In chemistry research, the observation is most useful when interpreted alongside the molecule’s broader functional-group pattern and structural context.
Peptide bonds contain amide carbonyls, so their electronic and geometric properties influence both how peptide chains are organized and how proteins acquire structure. The reduced electrophilicity contributes to amide stability, while restricted bond rotation limits possible conformations. These linked effects help chemists relate peptide composition to the shapes and behavior of proteins.
In polymers and pharmaceuticals, the amide carbonyl provides a structural feature whose stability, hydrogen bonding, and constrained geometry can affect molecular behavior. Chemists consider these properties when interpreting compound structures and designing biologically active molecules. Its presence therefore connects fundamental carbonyl chemistry with materials containing amide units and medicines whose activity depends on molecular shape.