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Hydroboration of 1-methylcyclopentene us...

Hydroboration of 1-methylcyclopentene using `B_2 D_6`, followed by treatment with alkaline hydrogen peroxide, gives

A

B

C

D

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The correct Answer is:
A
Hydroboration-oxidation take place (syn addition).
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Hydroboration is a reaction in which the boron hydride acts as an electrophile, R_2BH adds to a carbon - carbon double which acts as a nucleophile Organoborane compound The organoborane compound then is oxidised by treatment with hydrogen peroxide in aqueous sodium hydroxide to from alcohol. The OH group enters the carbon atom from the same side where the boron atom was present. Hence this reaction is highly regioselective and the boron atom attacheto that carbon atom which is less sterically hindred. Hydroboration oxidation and acid hydration will not give the same products in case of

Hydroboration is a reaction in which the boron hydride acts as an electrophile, R_2BH adds to a carbon - carbon double which acts as a nucleophile Organoborane compound The organoborane compound then is oxidised by treatment with hydrogen peroxide in aqueous sodium hydroxide to from alcohol. The OH group enters the carbon atom from the same side where the boron atom was present. Hence this reaction is highly regioselective and the boron atom attacheto that carbon atom which is less sterically hindred. Hydroboration oxidation and acid hydration will not give the same products in case of

Hydroboration is a reaction in which the boron hydride acts as an electrophile, R_2BH adds to a carbon - carbon double which acts as a nucleophile Organoborane compound The organoborane compound then is oxidised by treatment with hydrogen peroxide in aqueous sodium hydroxide to from alcohol. The OH group enters the carbon atom from the same side where the boron atom was present. Hence this reaction is highly regioselective and the boron atom attacheto that carbon atom which is less sterically hindred.

Hydroboration is a reaction in which the boron hydride acts as an electrophile, R_2BH adds to a carbon - carbon double which acts as a nucleophile Organoborane compound The organoborane compound then is oxidised by treatment with hydrogen peroxide in aqueous sodium hydroxide to from alcohol. The OH group enters the carbon atom from the same side where the boron atom was present. Hence this reaction is highly regioselective and the boron atom attacheto that carbon atom which is less sterically hindred.

Which of the following undergoes reduction with hydrogen peroxide in an alkaline medium ?

Which of the following does not give hydrogen peroxide on hydrolysis?

1,2-Dibromopropane on treatment with X moles of NaNH_2 followed by treatment with ethyl bromide gave a pentyne. The value of X is

Give the structures of the major organic products from 3-ethyl-2-pentene using (i) HBr in the presence of peroxide and (ii) HCl in the presence of peroxide.

MS CHOUHAN-HYDROCARBONS (ALKENES)-LEVEL-2
  1. Hydroboration of 1-methylcyclopentene using B2 D6, followed by treatme...

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  2. In each reagent box write a letter designating the best reagent and co...

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  3. Propene (CH3 – CH = CH2) can be transformed to compounds (a to j) list...

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  4. In each reaction box write a single letter designating the best reagen...

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  5. Match the reagents a-j with products A-J. There is one best product fo...

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  6. Match the column :

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  7. Match the column I with column II and with column III (Matrix).

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  8. Match the column I and II.

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  9. Sum of molecular mass of A, B, C, D (i.e. A+B + C + D) is equal to :

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  10. underset("(all isomers) ")(C2FClBrl) underset(Ni) overset(H2)to (A)(ex...

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  11. Match the following columns

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  12. Vladimir Markovnikov rule : Alkenes undergo electrophilic addition rea...

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  13. Vladimir Markovnikov rule : Alkenes undergo electrophilic addition rea...

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  14. Vladimir Markovnikov rule : Alkenes undergo electrophilic addition rea...

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  15. Vladimir Markovnikov rule : Alkenes undergo electrophilic addition rea...

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  16. Vladimir Markovnikov rule : Alkenes undergo electrophilic addition rea...

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  17. Vladimir Markovnikov rule : Alkenes undergo electrophilic addition rea...

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  18. CH3 - CH2-CH=CH2+CH2 OH overset(H^(o+))to CH3-CH2- underset(OCH3) un...

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  19. CH3 - CH2-CH=CH2+CH2 OH overset(H^(o+))to CH3-CH2- underset(OCH3) un...

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  20. CH3 - CH2-CH=CH2+CH2 OH overset(H^(o+))to CH3-CH2- underset(OCH3) un...

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  21. CH3 - CH2-CH=CH2+CH2 OH overset(H^(o+))to CH3-CH2- underset(OCH3) un...

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