E1/e2

[Moka11]

This is a good leaving group and a non-bulky base. Why the heck isnt this E1??
(Test tomorrow and im buggin on these dumb mistakes)

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[hawkeye712]

E1 occurs when you have a weak base while E2 occurs when you have a strong base.

 

[athomas]

You are confusing yourself that E2 only occurs with a bulky base. That is not correct, we just often see it most with a bulky base. E2 will occur when we have a strong base, E1 when we have a weak base (as previous response says). However, E2 with a non-bulky strong base (like above) will give us the Zaitsev (more substituted) product, and a bulky strong base (like LDA or t-butoxide) gives us the Anti-Zaitsev (least substituted) product.

Chad has a really good video just on distringuishing between Sn2/Sn1 and E2/E1 which you should really check out.

 

[monsieurwise]

Bulky base elimination is a subgroup of E2. If the base is BULKY but WEAK, it's still E1. Base is strong, no matter what base + good LG + good 3° or 2° carbons = E2.