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Date: 30-9-2020
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Date: 11-7-2016
3530
Date: 28-8-2018
1124
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The reason that hydrogen bromide adds in an anti-Markovnikov fashion in the presence of organic peroxides is simply a question of reaction rates. The free radical mechanism is much faster than the alternative electrophilic addition mechanism. Both mechanisms happen, but most of the product is the one from the free radical mechanism because that is working faster. With the other hydrogen halides, the opposite is true.
This is due to the relatively high hydrogen-chlorine bond strength.
In the case of hydrogen bromide, both steps of the propagation stage are exothermic.
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الصحة العالمية: شركات التبغ تستهدف جيلا جديدا بهذه الحيل
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بكل عزيمة ونشاط.. كيف يمكن للطلبة مواجهة الامتحانات؟
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المرجع الديني الاعلى يستقبل المتولي الشرعي للعتبة الحسينية ويثني على جهوده في مختلف المجالات
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