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Exercise: Synthesis of alkyl halides

Exercise

Which alkyl halides are formed easily by addition of hydrogen halide HX (HX = HCl, HBr or HI) to alkenes?

Please make a choice.

Please make a choice.

correct

wrong

partly correct

This is the right answer

Polyhalogenated alkanes

No, sorry

Monohalogenated alkanes

Correct

Dihalogenated alkanes

Sorry, that is wrong

Trihalogenated alkanes

Sorry, that is not correct.

Tetrahalogenated alkanes

No, sorry.

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Exercise

Which type of alkyl halide is obtained by the addition of bromine or chlorine to alkenes?

Please make a choice.

Please make a choice.

correct

wrong

partly correct

This is the right answer

1,1-Dihalogenoalkane.

No, sorry.

2,2-Dihalogenoalkane.

Sorry, that is not correct.

0,0-Dihalogenoalkane.

No, sorry.

1,2-Dihalogenoalkane.

Yes, that is correct. A 1,2-dihalgenoalkane is a vicinal alkyl dihalide.

1,3-Dihalogenoalkane.

Sorry, that is wrong.

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Exercise

Which reagent is used for the selective halogenation in allylic position?

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Please make a choice.

correct

wrong

partly correct

This is the right answer

N-chlorovinyl succinate (CVS)

Sorry, that is wrong

Polyvinyl chloride (PVC)

Sorry, certainly not

N-Bromosuccinimide (NBS)

That is correct!

Hydrogen chloride (HCl)

Sorry, that is wrong

Dimethylsulfoxide (DMSO)

No, sorry

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Exercise

Which compound family can be converted into alkyl halides by nucleophilic substitution?

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Please make a choice.

correct

wrong

partly correct

This is the right answer

Alkynes

No, sorry

Alkenes

Sorry, that is wrong

Carboxylic acids

Sorry, that is not correct

Alcohols

Yes, that is correct!

Aldehydes

No, sorry

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Exercise

In general, substitution of primary and secondary alcohols proceeds via an SN2 mechanism. For this purpose, they have to be converted first into alkyl halides. Which are the proper halogenation reagents?

Please make a choice.

Please make a choice.

correct

wrong

partly correct

This is the right answer

Dihydrogen monoxide (H2O)

Thionyl chloride (SOCl2)

Carbon dioxide (CO2)

Phosphorus tribromide (PBr3)

Acetic acid (CH3COOH)

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