Like this is supposed to stop me from posting stupid shit. I have posted about 4 stupid threads today. And thats just on these forums.
Look dipshit. It's a fucking nucleophile because it has excess electrons that are more stable when their density field is spread out across another atom. You take the fucking nucleophile and you attack the carbonyl carbon. Shit for brains wants to know why? The carbonyl carbon is obviously an electrophile, don't you even remember to think about resonance structures or like an ignorant moron do you always assume the first Lewis structure you see represents the molecule in its entirety. It attacks the carbonyl carbon and the leaving group leaves, that's why it's called a leaving group in the first place, think about it. Yes of course it brings its electrons with it, what the hell were you thinking. No, there are no alkane leaving groups, the carbonyl oxygen would become an alcohol. Do you even study this stuff or do you just expect everyone to force feed your sorry ass?