Question

Which of the following is not true in case of reaction with heated copper at $300ºC$?

• A. Phenol $\rightarrow$ Benzyl alcohol
• B. Secondary alcohol $\rightarrow$Ketone
• C. Primary alcohol $\rightarrow$Aldehyde
• D. Tertiary alcohol $\rightarrow$Olefin

Answer 1

Answer: (A)

Phenol $\rightarrow$ Benzyl alcohol

Answer 2

(1) $Phenol\underset{300ºC}{\overset{\quad Cu\quad}{\rightarrow}}$ benzyl alcohol is not true.

(2) Secondary alocohol $\underset{500ºC}{\overset{\quad Cu\quad}{\rightarrow}}$keton is true

(3) Primary alcohol $\underset{300ºC}{\overset{\quad Cu\quad}{\rightarrow}}$aldehyde is true

$\underset{Ethanol}{C_{2}H_{5}OH}\underset{300ºC}{\overset{\quad Cu\quad}{\rightarrow}}\underset{Acetaldehyde}{CH_{3}CHO} + H_{2}$

(4) Tertiary alcohol $\longrightarrow$olefin is true.

$\underset{Tert - butylalcohol}{H_{3}C - \overset{CH_{3}}{\overset{|}{\underset{CH_{3}}{\underset{|}{C}}}} - OH}\underset{300ºC}{\overset{\quad Cu\quad}{\rightarrow}}\underset{Methylpropene}{H_{3}C - \overset{CH_{3}}{\overset{|}{C}} = CH_{2} + H_{2}O}$