CBSE Class 12 · 2011 · All India · Alcohols Phenols and EthersShort Answer

How would you obtain the following?
i) benzoquinone from phenol
ii) 2-methylpropan-2-ol from methyl magnesium bromide
iii) propan-2-ol from propene

Solution

(i)

C_{6} H_{5} OH N a_{2} C r_{2} O_{7} / H_{2} S O_{4} p -benzoquinone

(ii) The Grignard needs a ketone partner:

C H_{3} MgBr + (C H_{3})_{2} CO \to (C H_{3})_{3} COMgBr H_{2} O/ H^{+} (C H_{3})_{3} COH

(iii)

C H_{3} CH = C H_{2} + H_{2} O H^{+} C H_{3} CH (OH) C H_{3}

CBSE Class 12 Board · 2011 · All India · Subjective