Organic Chemistry: E2 reaction mechanism?
So I have an exam in Ochem Lab tomorrow, and while I was studying I got confused. The dehyrdohalogenation of 2-bromo-butane with potassium tert-butoxide gives 1-butene as the major product (same for KOH). Why is that? trans-2-butene is more stable, and is the major product in the E1 reaction, but why is the primary hydrogen more easily abstracted than the secondary hydrogen in the E2 reaction? I understand the E2 mechanism just fine, but not really why it favors the less substituted double bond. Sorry if my question doesn’t make any sense…
This question is in the General Section. Responses must be helpful and on-topic.