This video is mean't to just help you guys out with Product Prediction in case you're stuck and you only have a few minutes left and have nothing to lose and no time to go through the mechanisms to make sure your answer is right. In this video I show the usual pattern that Hydrohalogenation, Halogenation, Hydroboration, Acid Catalyzed Hydration, Acidy Catalyzed Alkoxy Addition, and Halohydrin formation occurs.
******2020 Mid CoVid Update******
Hey guys! So YouTube removed all annotation bubbles that used to pop up on videos. So some of my corrections don’t show up anymore. I think the main correction that’s missing is that Hydration via Hydroboration Oxidation causes the H to go on the “Good” more substituted carbon of the alkene and the OH to go onto the “Bad/Crappy” (less substituted carbon).
But both must be double WEDGED or double DASHED (unless of course the carbon they are sitting on isn’t a Chiral Center where you don’t need to show stereochemistry aka wedging/dashing. Some profs will teach that the H and the OH will only yield a major product where they are on the “Less Hindered Face” of the alkene. Meaning if you have an alkene inside a 5 member ring (cyclopentane) and there is already a wedged (pointing upwards) methyl group near the alkene, the H and the OH would add onto the alkene carbons with both being dashed to avoid crowding the top face of the molecule (where the wedged methyl already is.)
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