91Ó°ÊÓ

The reaction of alcohols with ${\mathbf{PBr}}_{\mathbf{3}}$produces the corresponding bromides. Alcohols produce the corresponding chlorides when reacted with ${\mathbf{SOCl}}_{\mathbf{2}}$.Primary alcohols are oxidized into carboxylic acids and secondary alcohols are oxidized into ketones in the presence of ${\mathbf{CrO}}_{\mathbf{3}}$.

(a) The reaction of alcohol with ${\mathrm{PBr}}_3$generates the corresponding bromide. The compound 1-pentanol reacts with ${\mathrm{PBr}}_3$to form 1-bromopentane. The reaction can be given as:

Reaction (a)

(b) The reaction of alcohol with ${\mathrm{SOCl}}_2$produces the corresponding chloride. The compound, 1-pentanol reacts with ${\mathrm{SOCl}}_2$to form 1-chloropentane. The reaction can be given as:

Reaction (b)

(c) The reaction of alcohol with ${\mathrm{CrO}}_3$and ${\mathrm{H}}_3{\mathrm{O}}^{+}$gives carboxylic acids or ketones. The compound, 1-pentanol reacts with ${\mathrm{CrO}}_3$and ${\mathrm{H}}_3{\mathrm{O}}^{+}$ to form pentanoic acid. The reaction can be given as:

Reaction (c)

(d) The reaction of alcohol with Dess-Martin periodinate produces aldehydes or ketones depending on the alcohol. The compound, 1-pentanol reacts with periodinane and localid="1663238819716" ${\mathrm{CH}}_2{\mathrm{Cl}}_2$ to form pentanal. The reaction can be given as:

Reaction (d)