Hydrocarbons 3 (2 Viewers)

[nsbrando]

How do i do this question. Suggest how the following compounds could be prepared

1. 2-butanol
2. 2,3-dichloropentane
3. 3-bromohexane

 

[nsbrando]

also is the first one, butene + H2O???

 

[someth1ng]

also is the first one, butene + H2O???

That's part of the way of how it is formed.

Strange question, I'm not sure what the question asks...

I suppose...
1. Butanol one can undergo a dehydration reaction to form 1-butene or 2-butene.
2. In terms of boiling point, 2-butanol should be the highest because it has hydrogen bonding. Next should be 2,3-dichloropentane, although a shorter alkyl chain, it is more polar than 3-bromohexane and hence, likely to have a higher boiling point.
3. All of them should be the same/similar in colour.
4. All will form different products if combusted.

EDIT: misread the question - ignore this.

 

[nsbrando]

That's part of the way of how it is formed.

Strange question, I'm not sure what the question asks...

I suppose the first one can undergo a dehydration reaction to form butene.

well i say the question is asking the other way round of answering. like what are the compounts which forms e.g. 2 butanol

 

[someth1ng]

OH LOL, I thought it said "compared" not "prepared" HAAHAHAHAHAHAHAHH

 

[someth1ng]

How do i do this question. Suggest how the following compounds could be prepared

1. 2-butanol
2. 2,3-dichloropentane
3. 3-bromohexane

1. Hydration of 2-butene using dilute H2SO4 catalyst at 300C will always form 2-butanol.
2. 2,3-dichloropentane could be formed by bubbling Cl2(g) through liquid 2-pentene.
3. 3-bromohexane can be formed by the hydrohalogenation of 3-hexene by bubbling HBr(g) through it.

 

[nsbrando]

1. Hydration of 2-butene using dilute H2SO4 catalyst at 300C will always form 2-butanol.
2. 2,3-dichloropentane could be formed by bubbling Cl2(g) through liquid 2-pentene.
3. 3-bromohexane can be formed by the hydrohalogenation of 3-hexene by bubbling HBr(g) through it.

oh i thought the first one would be 2-butene + H2O

 

[someth1ng]

oh i thought the first one would be 2-butene + H2O

Yeah, it is. I said "hydration" which means reacting with water but you need a catalyst (H2SO4) because it water won't readily attack the double bond in 2-butene. The double is highly concentrated with electrons (negative charge) and so, you need a catalyst with an electron deficiency such as H+.

 

[nsbrando]

Yeah, it is. I said "hydration" which means reacting with water but you need a catalyst (H2SO4) because it water won't readily attack the double bond in 2-butene. The double is highly concentrated with electrons (negative charge) and so, you need a catalyst with an electron deficiency such as H+.

oh ok right thanks

 

[Beaconite]

Poorly worded question ... :S