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Chemistry : Alkanes and Alkenes

Show reactions of pentene, hexene and octene with bromine water
How would u do this???
@Neuth @jamestg
Reply 2
Avatar for z33
z33
21
well
pentene = C5H10 (l)
bromine water = Br2 (aq)

so just put them together

C5H10 + Br2 -> C5H10Br2

simplez

bromine water should go from orange to colourless if reacted with an alkene

if you draw the full structural formula, all that happens when you add the Br2 is that the double bond breaks and joins up to the 2 'Br's

i hope that made sense lol
Pentene, hexene and octene, all double bond alkenes. They have 'spare bonds' which open up and form bonds with the bromine water atoms causing it to discolourise.
This is all we needed to know :tongue:
Reply 4
Avatar for Neuth
Neuth
19
Original post by CoolCavy


Oops - I'm too late to help now :redface:
Thanks for quoting me though, Cavy :fluffy:
Original post by Neuth
Oops - I'm too late to help now :redface:
Thanks for quoting me though, Cavy :fluffy:


no problem , you sprang up in my head when i saw this thread as you are the oracle of knowledge:h:
Simplistically, the alkene bond receives a Br atom at each end and the mechanism proceeds via a bromonium bridge intermediate.
Reply 7
Avatar for jamestg
jamestg
21
Original post by CoolCavy


Original post by Neuth
Oops - I'm too late to help now :redface:
Thanks for quoting me though, Cavy :fluffy:


Ditto although I've pretty much forgotten all of my chemistry GCSE :colondollar:
Original post by jamestg
Ditto although I've pretty much forgotten all of my chemistry GCSE :colondollar:


lol same, i'm trying to push the trauma to the darkest, deepest recesses of my mind :indiff:
Reply 9
Avatar for jamestg
jamestg
21
Original post by CoolCavy
lol same, i'm trying to push the trauma to the darkest, deepest recesses of my mind :indiff:

They were some dark days:frown::wink:

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