Hi guys, I'm just starting my review of Organic. I'm confused about leaving groups and nucleophiles. Here is my question: Will 2-bromobutane undergo SN2 with I- in an aprotic solvent? The answer says yes, and also talks about the inversion of the stereochemistry (which I get). However, I thought that Iodine is a better leaving group and Bromide is a better nucleophile. So wouldn't the rxn not take place? Or am I getting confused and applying rules for protic/SN1? Does the strength of the nucleophile and leaving group reverse in an aprotic solvent? Any help explaining this would be appreciated. Thanks!