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About BioFelix

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  1. I am currently studying for an organic chemistry exam and I just couldn't come up with a solution to the following question: Consider the reaction of 2-Propen + Br2 with water as solvent. Why will the nucleophilic water molecule add on C-2 and rather than on C1 of the Bromonium-Ion? The answer seems to be, because in the transition state the bonding between Br and C will dissociate quicker than the bonding between O and C will form, which leads to a positive charge on that C-Atom in the transition state and therefore water will add on the more stable "carbokation-like" carbon. My question is: why does the Br-C bonding dissociate quicker than the O-C bonding forms? (I read that in the pearson organic chemistry textbook). Does it have anything to do with the Hammond-postulate? Or are there any other thermodynamic or kinetics reasons? Unfortunately I haven't found an answer on the internet yet and also not in other textbooks. Maybe you can help Thanks!
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