So when you're working with something like 1,3-butadiene for the diene, do you say that the terminal methyl (carbon-4) is causing an inductive effect on the adjacent carbon ONLY and causing the neighboring carbon (so that's carbon-3) to have a partial negative charge? Or do you say that the methyl donates a lone pair to cause the terminal carbon (carbon-1) to have a partial negative charge? I am almost positive the first suggestion is correct.
Basically I am asking does the methyl (carbon-4) on 1,3-butadiene cause carbon-1 or carbon-3 to have the partial negative charge?
If what I said is true, then the reaction in my picture below doesn't work, right?
EDIT: I heavily edited this post to try to make my question less confusing.