AS Mechanisms Help Watch

ps1265A
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Can someone check this mechanism for me please? Especially for the second alkene formation.

Also, I've used H+, is this from "2H+" and SO4-?

Also, can this reaction not be an elimination reaction? A lone pair from oxygen of the H2SO4 attacks a H which forms a double bond and releases OH (dehydration)?

Could the reaction above (my mechanism) be classed as dehydration?
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charco
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(Original post by ps1265A)


Can someone check this mechanism for me please? Especially for the second alkene formation.

Also, I've used H+, is this from "2H+" and SO4-?

Also, can this reaction not be an elimination reaction? A lone pair from oxygen of the H2SO4 attacks a H which forms a double bond and releases OH (dehydration)?

Could the reaction above (my mechanism) be classed as dehydration?
The only thing that moves in a mechanism is electron pairs... you might like to re-assess your mechanism as you have an arrow from a positive charge ...

... but other than that it looks ok.
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