because aliphatic amine is a weak electrophile. second because the coupling reaction occur at ortho and para position only,while in aliphatic,there is no ortho or para position
What do u mean by chemical or physical reaction... Please give me an answer so i can give you the answer.
This is a sign of a chemical reaction.
Such reactions are called Exothermic reactions.
Aromatic aldehydes, such as benzaldehyde, typically do not give a positive Fehling's test due to the lack of alpha-hydrogens required for oxidation. Aromatic aldehydes are not easily oxidized in the Fehling's test compared to aliphatic aldehydes.
The chemical equation is the word expression of a chemical reaction.The rate of reaction give information about the speed of this reaction.
The Perkin reaction typically involves the condensation of aromatic aldehydes with an acid anhydride in the presence of a base to form an α,β-unsaturated carboxylic acid. Aliphatic aldehydes lack the necessary stabilization of the intermediate enolate ion due to the absence of conjugation with an aromatic ring, making the Perkin reaction unfavorable for aliphatic aldehydes.
Transformer coupling
Aniline is a specific type of primary amine that contains a phenyl group attached to the amino group. One way to distinguish them is by performing a diazo coupling reaction, where aniline will give a colored dye, whereas a simple primary amine will not show this reaction. Additionally, aniline can be distinguished by its distinctive smell and the fact that it can undergo aromatic electrophilic substitution reactions due to the presence of the phenyl group.
Reaction product of reacting acid with alcohol to give an ester this is called polyester, saturated polyester is reaction product of saturated acid " may be aromatic dibasic acids like phthalic anhydride, isophthalic acid, terephthalic acid,etc.... or aliphatic aicds like adipic, sebacicl,....etc." with alcohol like " glycerol, pentaerythritol, trimethylol propane, neopentyl glycol, etc......." . Reaction product of reacting acid with alcohol to give an ester this is called polyester, saturated polyester is reaction product of saturated acid " may be aromatic dibasic acids like phthalic anhydride, isophthalic acid, terephthalic acid,etc.... or aliphatic aicds like adipic, sebacicl,....etc." with alcohol like " glycerol, pentaerythritol, trimethylol propane, neopentyl glycol, etc......." .
Breather is provided where the oil tends to give out fumes after getting heated. in a fluid coupling the fluid is not heated upto that temperature hence not required
DC coupling on the input/output will always give higher gain because AC coupling involves inserting a capacitor, which adds impedance and augments the signal. AC coupling is sometimes necessary though, for such purposes as eliminating DC offset on the base of a transistor, or eliminating a DC offset in a single supply opamp circuit.
It means the person is wanting to give reaction to the weather. He/She wants to give reaction about the day.
This is probably a homework or exam question.
couplings are used to join sections of long transmission shafts. couplings are also used to connect the shaft of a driving machine to the shaft of a separately built machine so as to give an effect of continuous shaft. the general classification of couplings is as given under: 1. rigid coupling 2. flexible coupling 3.Camlock coupling
reaction papers
Amines have basic properties due to the lone pair of electrons on the nitrogen atom. When an amine reacts with the acidic components in litmus paper, it causes a color change, turning the paper blue and indicating the presence of a base or basic substance.
What do u mean by chemical or physical reaction... Please give me an answer so i can give you the answer.