Alkene Reactions: Bromohydrin Formation using Br2 and H2O Bromine (Br2) or N-bromosuccinate (NBS) in the presence of alkenes and water, react together form bromohydrins: Bromine reacts first with the alkene molecule, and ultimately resides on the least substituted carbon on the double bond (anti-Markovnikov).

2021年12月16日 · In second step of the mechanism, both H 2 O (solvent) and Br – (produced in the first step) are nucleophiles and have chance to react with the cyclic bromonium ion. However since H 2 O is the solvent, its concentration is much higher than that of Br –, so the major products come from the attack of H 2 O.

2020年7月4日 · This organic chemistry video tutorial provides the mechanism of the reaction with an alkene + Br2 + H2O as well as explaining how to determine the major prod...

This reaction involves the addition of bromine (Br2) and water (H2O) to an alkene compound, producing a new product. Join us on this journey as we break down the process step-by-step and discover the mathematical concepts intertwined within.

Bromonydrin formation is addition reaction of Br and OH across the alkene and the product is called a bromohydrin (bromo=bromine, hydrin=hydro, water/H 2 O). Lewis acid like the bromine is able to bond to the alkene π electrons, and the resulting complex rearranges or is attacked by nucleophiles to give addition products.

2023年8月15日 · Chlorine (Cl2) and bromine(Br2) react selectively with the double bond of alkenes, and these reactions are what we will focus on. Fluorine adds uncontrollably with alkenes,and the addition of iodine is unfavorable, so th; 15.5: Hydration of Alkenes - Addition of H₂O by Oxymercuration

🧪 The video discusses the reaction between an alkene and bromine in the presence of water, leading to the formation of a halohydrin, specifically a bromohydrin. 🔍 The reaction is regioselective, with the hydroxyl group attaching to the more substituted secondary carbon and bromine to the less substituted primary carbon.

2020年7月5日 · This video explains the reaction between an alkene and bromine in water, resulting in the formation of a halo hydrant with selective product distribution based on the primary and secondary carbons. The reaction can yield stereoisomers due …

2023年8月15日 · Introduction. A halogen molecule, for example Br 2, approaches a double bond of the alkene, electrons in the double bond repel electrons in the bromine molecule causing polarization of the halogen-halogen bond. This creates a dipole moment in the halogen-halogen bond. Heterolytic bond cleavage occurs and one of the halogens obtains a positive charge and reacts as an electrophile.

The main electrophile in bromine water is $\ce{Br2}$ and this is what does the initial attack on the double bond, forming a cyclic bromonium ion. The bromonium ion is a strong electrophile and so it will react with any nucleophiles that are around.