I was reading dehydration of alcohols under acidic conditions (using concentrated H2SO4 or H3PO4) and with heat (160 degree Celsius) to form alkenes

Now consider the dehydration of butan-2-ol
It will decompose into either but-2-ene or but-1-ene. We will call but-2-ene as Zaytsev product, because it has more sidechains compared to but-1-ene, which is Hoffman product.

Does Zaytsev's alkene always have more alpha hydrogens than Hoffmann's? Or are there any exception?



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