- #1
ChemDoodle
- 25
- 0
Hey I'm studying for my chem exam & I am having difficulty solving some problems.
1. 1,3cyclohexadiene + Br2= ?
Here,should i treat it like a conjugated diene? Meaning that the Br molecules will have 1,2 and 1,4 additions on the diene and 2 products will be there?
2. 1,4cyclohexadiene + Br2 = ?
Here should i t eat it like an isolated diene? & if so..where should the Br add? On which bond? Or will there be 2 products? With Br adding on the 1 double bond in the first & 4 double bond in the second?
3. When propylene is treated with bromine in methanol (CH3OH),two products are formed C3H6Br2 & C4H9BrO.Explain meachanistically how each are formed.
Here,the first product is simple..its obtained by halogenation of alkenes..simple addition of the Br molecules on the pi-bond.But i wasn't able to determine how the second product is obtained? Obviously methanol has something to do with it..But what kind of reaction is it? We studied hyrohalogenation but nothing about alcohols & halogens together.
4. 1,2-dimethylcyclopentene + BH3 + H2O2/NaOH =
This gives us the same product as direct hydrolysis since the alkene is symmetrical,correct?
Any help in these questions would be greatly appreciated.They are just doubts that need clarifying :) & my exam is tomorrow.
1. 1,3cyclohexadiene + Br2= ?
Here,should i treat it like a conjugated diene? Meaning that the Br molecules will have 1,2 and 1,4 additions on the diene and 2 products will be there?
2. 1,4cyclohexadiene + Br2 = ?
Here should i t eat it like an isolated diene? & if so..where should the Br add? On which bond? Or will there be 2 products? With Br adding on the 1 double bond in the first & 4 double bond in the second?
3. When propylene is treated with bromine in methanol (CH3OH),two products are formed C3H6Br2 & C4H9BrO.Explain meachanistically how each are formed.
Here,the first product is simple..its obtained by halogenation of alkenes..simple addition of the Br molecules on the pi-bond.But i wasn't able to determine how the second product is obtained? Obviously methanol has something to do with it..But what kind of reaction is it? We studied hyrohalogenation but nothing about alcohols & halogens together.
4. 1,2-dimethylcyclopentene + BH3 + H2O2/NaOH =
This gives us the same product as direct hydrolysis since the alkene is symmetrical,correct?
Any help in these questions would be greatly appreciated.They are just doubts that need clarifying :) & my exam is tomorrow.