1
JEE Mains
Reaction of alchols or phenols with grignard reagent
When an alcohol is treated with a Grignard reagent , the H atom of the -OH group combines with the alkyl part of the Grignard reagent to give an alcohol.
g of an alcohol, was added to and the gas evolved measured mL at STP. The molecular mass of will be?
When phenyl magnesium bromide reacts with tertiary butanol, which of the following is formed?
Why phenols being stronger acids than alcohols
The alcohols are less acidic then phenols because it is very tough to remove the H ion from alcohol. Phenol can lose hydrogen ion easily because phenoxide ion formed is stabilized to some extent as negative charge on the oxygen atom is delocalised around the ring. De-localized charge means negative charge is distributed almost equally through the compounds. The more stable ion is, the more likely it is to form.
I. Ethanol
II. Acetic acid
III. Phenol
IV. Acetonitrile
The acidity of compounds I-IV in water follows the order:
II. Acetic acid
III. Phenol
IV. Acetonitrile
The acidity of compounds I-IV in water follows the order:
Dehydration by protonic acids
Alcohols, when treated with protonic acid, produce alkenes.
Rate of dehydration of the following in increasing order is:
