Reactivities of Alkanes and Alkenes Equations (1 Viewer)

[.ben]

Does anyone know the equation representing the reaction of bromine water and cyclohexane and cyclohexene? Thnaks

Also does anyone have any info on this dpotpoint:

 Analyse information from secondary sources such as computer simulations, molecular model kits or multimedia resources to model the polymerisation process

thangks again

 

[pLuvia]

That dot point was a sort of "practical" where you just make models of hydrocarbons then polymerising it (adding more hydrocarbons) to it. Isn't a very important dot point, don't worry about it too much. It's just to give you an idea of how polymerisation works.

To the alkanes and alkenes practical:
C₆H_{10 (aq)}+Br_{2 (aq)}-->C6H₁₀Br2

Make sure you know that the Bromine water or Iodine water changes colour not the cyclohexene or hexane

And the other should be similar to that
Hope that helped

 

[ashsha]

Does anyone know the equation representing the reaction of bromine water and cyclohexane and cyclohexene? Thnaks

Also does anyone have any info on this dpotpoint:

 Analyse information from secondary sources such as computer simulations, molecular model kits or multimedia resources to model the polymerisation process

thangks again

um dont ask why i quoted it but lol
firstly bromine water doesnt react with cyclohexane cos its a single bond and nothing is broken so nothing is formed so no reaction...
with cyclo hexene it forms 1,2 dibromocyclohexANE

c6h10 + br2-->C6H10Br2

2 clear solutions mixed with different layers. and hats the addition reaction of breaking bonds!
alkenes react with bromine water because their double bondas are broken so bromine is added in making it an alkane.
and hmmmm mdelling the polymerisation process would sorta be the molecular drawings which is kinda impossible on the net lols
um hope this helped!

 

[.ben]

ok good stuff, thanks guys

 

[funking_you]

If you react an alkene, e.g. ethene with liquid bromine, Br₂(l), only one product is formed, i.e. 1,2-dibromoethane.

however, 'bromine water' is usually a 3-5% solution of liquid bromine.
The presence of the water complicates the reaction and it turns out that there are more than one product formed. The major product of ethene and 'bromine water' is actually 2-bromoethanol, with only a small amount of 1,2-dibromoethane formed.

This is because the liquid bromine that dissolve in the water will reaction with the water: Br2(l) + H2O <---> BrOH(aq) + HBr(aq).

HOWEVER FOR HSC PURPOSES, discussing this more advanced mechanism for the reaction is NOT required.
It is sufficient to just say that ethene reacts with 'bromine water' to from 1,2-dibromoethane.
Why? because the aim of this reaction (in the hsc syllabus) is to observe the decolourisation of bromine water, identifying that a reaction took place.

 

[.ben]

thanks chemcoach