What is 1,2 H- Shift and how to decide 1,2 H-shift will occur and it occurs only in compounds which exhibit carbocation?
It is process of rearrangement of C+ , it happen whenever a more stable C+ can be formed if the + of C+ is moved to adjacent C with the help of shifting of Hydride ( H)
There are more should shifts like alkyl shift and phenyl shift
Yes it occurs in carbonation and can be done when carbonation is aquring more stable position not for free radical
The mechanism we study for dehydration of alcohols to form alkene in ncert class 12 alcohols chapter is E1 or E2 ?
So when E2 occurs in dehydration of alcohols to alkene
See, in dehydration of alcohol, c+ is formed ( and rearranged) and then elimination happens and hence dehydration of alcohol is always e1
Is it given name wrong is its E1 ? in this book
Please clear my doubt of post 8
It is 1degree alcohol and hence C+ won’t be stable here , so C+ is not formed rather simultaneously H escapes and hence E2 is observed.
But even if 2 degree C+ is formed we do E1 , so it is correct that e2 can happen but mostly it is e1 until very bad c+ is being formed
So can you show in short difference of E1 and E2 for alkenes from alcohol
Basically, in E1 reaction carbocation is formed, whereas in E2 reaction no carbocation of formed
@abhijit_2020 in E1 reaction C+ is formed and hence there is a chance of rearrangement of C+ and formation of totally different product whereas in E2 reaction C+ is not formed , there is simultaneous removal of H and OH2+