! Organic Compound Questions

[hyperblade01]

Just a few queries:


- Iodine in hexane is reacted with cyclohexane and then cyclohexene.
There is no reaction with cyclohexane but with cyclohexene, 1,2- Iodocyclohexane is formed.    <<<<< Need confirmation and a possible equation


-Dichloromethane is mixed with ethanol and solid potassium hydroxide (The ethanol helps dissolve the solid). The mixture is heated and then nitric acid is added to acidify the solution. Silver nitrate is added and a silver chloride precipitate is formed.

All I know is the dichloromethane has reacted and the Chlorine ions are in the solution, what exactly has happened?



- Ethanol and potassium permanganate and sulfuric acid are placed in a test tube and there is a colour change as Mn 2+ ions have formed.
What is the chemical equation for this? (I believe sulfuric acid is a catalyst, but if it participates in the reaction then I guess not )



Thanks in advance





 

[Mao]

1. "iodine in hexane"? Do you mean iodine (I₂) dissolved in hexane? or iodohexane?

2. the chloro in dichloromethane is substituted with OH from KOH.the nitric acid provides the acidic environment to catalyse the reaction.

3. , the H+ comes from sulfuric acid.

[chem-nerd]

1. This is the same as the Br₂ test for alkenes (except without the colour change). The I₂ will undergo an addition reaction with the cyclohexene to form 1,2-iodocyclohexane.

[hyperblade01]

1. "iodine in hexane"? Do you mean iodine (I₂) dissolved in hexane? or iodohexane?

2. the chloro in dichloromethane is substituted with OH from KOH.the nitric acid provides the acidic environment to catalyse the reaction.

3. , the H+ comes from sulfuric acid.

1. The sheet said "iodine in hexane" - will clarify this when my chem teacher comes back to school tomorrow

2.  So the only thing ethanol does is dissolve the solid?

3. If that is the equation, what is the purpose of ethanol?



Thanks in advance again

[pHysiX]

2) from what i know, the OH from KOH will substitute the chloro, making an alcohol.

hmmm, i'm probably wrong, but i'm seeing two substitution reactions.

[chem-nerd]

3. ethanol is being converted into ethanoic acid (the oxidation reaction that balances the reduction reaction Mao wrote)