Advertisements
Advertisements
प्रश्न
The carbon-oxygen bond in phenol is slightly stronger than that in methanol. Why?
Advertisements
उत्तर
This can be explained as under:
(i) In phenol, the conjugation of unshared electron pairs over oxygen with aromatic ring results in partial double bond character in C – O bond.
In methanol, no such conjugation (resonance) is possible.
(ii) In phenol, oxygen is attached to sp2 hybridised carbon while in methanol, oxygen attached to sp2 hybridised carbon. An sp2 hybridised carbon is more electronegative (because of greater 5-character) than sp3 hybridised carbon atom. Therefore, the bond between oxygen and sp2 hybridised carbon is more stable than the bond between oxygen and sp2, hybridised orbital.
APPEARS IN
संबंधित प्रश्न
Write resonance structures of aniline. What is the action of benzene diazonium chloride on ethanol?
Methanol and ethanol are miscible in water due to ____________.
Which of the following is correct?
Phenol is less acidic than ______.
Write the IUPAC name of the following compound.
\[\begin{array}{cc}
\phantom{.}\ce{CH3 - CH - CH - CH - CH - CH3}\phantom{}\\
\phantom{......}|\phantom{......}|\phantom{......}|\phantom{.....}|\phantom{........}\\
\phantom{...}\ce{CH3}\phantom{...}\ce{OH}\phantom{...}\ce{C2H5}\phantom{.}\ce{OH}\phantom{...}\end{array}\]
Out of 2-chloroethanol and ethanol which is more acidic and why?
Suggest a reagent for conversion of ethanol to ethanoic acid.
Arrange the following compounds in increasing order of acidity and give a suitable explanation.
Phenol, o-nitrophenol, o-cresol
Name the enzymes and write the reactions involved in the preparation of ethanol from sucrose by fermentation.
Dipole moment of phenol is smaller than that of methanol. Why?
Arrange water, ethanol and phenol in increasing order of acidity and give reason for your answer.
Assertion: Ethanol is a weaker acid than phenol.
Reason: Sodium ethoxide may be prepared by the reaction of ethanol with aqueous \[\ce{NaOH}\].
Convert the following:
Propanenitrile to ethanol.
Which reagent can convert acetic acid into ethanol?
Write chemical reactions of following reagents on methoxyethane:
dilute H2SO4
If the starting material is 1-methyl-1,2-epoxy cyclopentane, of absolute configuration, decide which one compound correctly represents the product of its reaction with sodium methoxide in methanol.
How methanol is obtained from methanal.
