* ? H2 1) OsO, 2) NaHSO/H,0 ? HBr

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### Chemical Reactions and Transformations

In the image above, three different chemical reactions are depicted, each involving an organic molecule with distinct reagents leading to unknown products represented by question marks.

1. **Reaction 1: Hydrogenation Reaction**
   - **Reactant**: A cyclohexene derivative with two methyl groups.
   - **Reagents**: Hydrogen gas (\( \text{H}_2 \)) and a platinum (\( \text{Pt} \)) catalyst.
   - **Explanation**: This reaction is a hydrogenation process where the double bond in the cyclohexene ring is reduced, leading to the formation of an alkane.

2. **Reaction 2: Dihydroxylation Reaction**
   - **Reactant**: A cyclohexene derivative, similar to the first reactant.
   - **Reagents**: Osmium tetroxide (\( \text{OsO}_4 \)) followed by sodium bisulfite (\( \text{NaHSO}_3 \)) in water (\( \text{H}_2\text{O} \)).
   - **Explanation**: This reaction involves dihydroxylation, where the double bond is transformed into a vicinal diol (two hydroxyl groups added at adjacent carbons).

3. **Reaction 3: Hydrohalogenation Reaction**
   - **Reactant**: A different cyclohexene derivative with an alkyl side chain.
   - **Reagent**: Hydrobromic acid (\( \text{HBr} \)).
   - **Explanation**: The hydrohalogenation reaction involves the addition of a bromine and a hydrogen across the double bond, leading to the formation of a bromoalkane.

These reactions are fundamental in organic chemistry, illustrating the conversion of alkenes into different functionalized compounds through various addition reactions.
Transcribed Image Text:### Chemical Reactions and Transformations In the image above, three different chemical reactions are depicted, each involving an organic molecule with distinct reagents leading to unknown products represented by question marks. 1. **Reaction 1: Hydrogenation Reaction** - **Reactant**: A cyclohexene derivative with two methyl groups. - **Reagents**: Hydrogen gas (\( \text{H}_2 \)) and a platinum (\( \text{Pt} \)) catalyst. - **Explanation**: This reaction is a hydrogenation process where the double bond in the cyclohexene ring is reduced, leading to the formation of an alkane. 2. **Reaction 2: Dihydroxylation Reaction** - **Reactant**: A cyclohexene derivative, similar to the first reactant. - **Reagents**: Osmium tetroxide (\( \text{OsO}_4 \)) followed by sodium bisulfite (\( \text{NaHSO}_3 \)) in water (\( \text{H}_2\text{O} \)). - **Explanation**: This reaction involves dihydroxylation, where the double bond is transformed into a vicinal diol (two hydroxyl groups added at adjacent carbons). 3. **Reaction 3: Hydrohalogenation Reaction** - **Reactant**: A different cyclohexene derivative with an alkyl side chain. - **Reagent**: Hydrobromic acid (\( \text{HBr} \)). - **Explanation**: The hydrohalogenation reaction involves the addition of a bromine and a hydrogen across the double bond, leading to the formation of a bromoalkane. These reactions are fundamental in organic chemistry, illustrating the conversion of alkenes into different functionalized compounds through various addition reactions.
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