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Standard XII

Chemistry

Preparation of Alcohols from Alkenes

Propene CH3...

Question

Propene $C H_{3} - C H = C H_{2}$ can be converted into $1$ -propanol by oxidation. Indicate which sets of reagents amongst the following is ideal to effect the above conversion?

K M n O_{4}

(alkaline)

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Osmimum tetroxide

(O s O_{4} / C H_{2} C l_{2})

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B_{2} H_{6}

and alk

H_{2} O_{2}

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O_{3}

and

Z n / H_{2} O

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Solution

The correct option is D $B_{2} H_{6}$ and alk $H_{2} O_{2}$
$C H_{3} - C H = C H_{2} B_{2} H_{6} - -- \to C H_{3} - C | H H - C | H_{2} B H_{2} H_{2} O_{2} - -- \to C H_{3} - C H_{2} - C H_{2} O H$
This reaction is called as hydroboration-oxidation.

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Similar questions

Propene $C H_{3} - C H = C H_{2}$ can be converted into 1-propanol by oxidation. Which set of reagents among the following is ideal to affect the conversion ?

Propene $C H_{3} - C H = C H_{2}$ can be converted into propanol -1 by oxidation. Indicate which set of reagents amongst the following is ideal to bring the above conversion.

Propene, CH₃-CH=CH₂ can be converted to 1-propanol by oxidation. Which set of reagents among the following is

ideal to effect the conversion [CBSE PMT 1991]

Q. Propene

(C H_{3} - C H = C H_{2})

can be transformed to compound (a to j) listed in the left-hand column.
Write letter designating the reagent, you believe will achieve desired transformation. In the case of a multi step sequence, write the reagent in the order they are to be used.

	Desired product	No. of Steps	Write options		Reagent List
a.	$C H_{3} C H B r C H_{2} B r$	one		A.	$H g (O A c)_{2}$ in $H_{2} O$
b.	$(C H_{3})_{2} C H O H$	two		B.	$B_{2} H_{6}$ in THF
c.	$C H_{3} C H_{2} C H_{2} O H$	two		C.	$N a B H_{4}$ in alcohol
d.	$C H_{3} C O C H_{3}$	three		D.	$B r_{2}$ in $C H_{2} C l_{2}$
e.	$C H_{3} C H_{2} C H O$	three		E.	$H_{2} O_{2}$ in aqueous base
f.	$C H_{3} C H (O H) C H_{2} B r$	one		F.	HOBr(NBS in aqueous acetone)
g.	$(C H_{3})_{2} C H B r$	one		G.	HBr in $C H_{2} C l_{2}$
h.	$C H_{3} C H (O H) C H_{2} O H$	two		H.	$O s O_{4}$ in ether
i.	$C H_{3} - C H_{2} - C H_{2} - C l$	three		I.	Thionyl chloride $(S O C l_{2})$
j.	$C H_{3} - C \equiv C H$	two		J.	$N a H S O_{3}$ in aqueous acetone
				K.	NaOH in alcohol and reflux
				L.	$N a N H_{2}$ (strong base)

Q. Complete the following reaction :

C H_{3}

- CH =

C H_{2}

_{3}

(A)

Z n + H_{2} O \to

(B)

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Propene CH3−CH=CH2 can be converted into 1-propanol by oxidation. Indicate which sets of reagents amongst the following is ideal to effect the above conversion?

The correct option is D B2H6 and alk H2O2CH3−CH=CH2B2H6−−−→CH3−C|HH−C|H2BH2H2O2−−−→CH3−CH2−CH2OHThis reaction is called as hydroboration-oxidation.

Propene $C H_{3} - C H = C H_{2}$ can be converted into $1$ -propanol by oxidation. Indicate which sets of reagents amongst the following is ideal to effect the above conversion?

The correct option is D $B_{2} H_{6}$ and alk $H_{2} O_{2}$
$C H_{3} - C H = C H_{2} B_{2} H_{6} - -- \to C H_{3} - C | H H - C | H_{2} B H_{2} H_{2} O_{2} - -- \to C H_{3} - C H_{2} - C H_{2} O H$
This reaction is called as hydroboration-oxidation.