# Shouldn't the Hofmann product be preferred in this elimination?

Shouldn't the exocyclic alkene (Hofmann) be the major product? The base is $\ce{t-BuO-}$ (tertiary butoxide ion), which is pretty bulky. I think the Saytzeff product should be the minor product.

Also, the solution says "E2, some E1". It's a 3° alkyl halide (more sterically hindered than 1° and 2°), so shouldn't it undergo E1 elimination?

• You have reasoning already in your picture. Also don't put "thanks" in posts. You can do it in comments. – Mithoron Jun 29 '17 at 15:58
• I don't understand the reason given, according to that E1 Hoffman elimination should be favoured. Please explain. – arya_stark Jun 29 '17 at 16:19
• "good base" for mechanism, high temp - isomer – Mithoron Jun 29 '17 at 16:28
• The base is sterically hindered. – arya_stark Jun 29 '17 at 16:51
• Maybe it would matter matter in low temp. – Mithoron Jun 29 '17 at 16:55

Yup, $\ce{t-BuO-}$ is a bulky base.
Take a look at this picture of a $\ce{t-BuO-}$ molecules approaching the hydrogen of 1-bromo-1-methyl-cyclopentane.
Does that $\ce{t-BuO-}$ look like it's struggling to pull that hydrogen out? Definitely not. It's doing what it does with ease.