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1,3-Cyclohexanedione CAS 504-02-9 - Quality Chemical from China Suppliers & Factory for Your Needs
Molecular Structure of 1,3-Cyclohexanedione
The molecular structure of 1,3-cyclohexanedione contains two carbonyl groups (C=O), and the carbonyl groups are located at the 1st and 3rd positions of the cyclohexane ring. This structure makes the molecule have a certain conjugated system, which affects its chemical and physical properties. Due to the presence of two carbonyl groups, the hydrogen atoms (α-hydrogen) adjacent to the carbonyl groups on the cyclohexane ring have higher activity, which is the active center of many chemical reactions of this compound.
Chemical Properties & Reactions
Since the α-hydrogen atoms of the two carbonyl groups are highly active, they can undergo halogenation reactions, condensation reactions, and various other transformations:
- Condensation Reactions Under alkaline conditions, they can undergo aldol condensation reactions with aldehydes and ketones; and they can undergo Knoevenagel condensation reactions with diethyl malonate under the catalysis of sodium alcohol.
- Nucleophilic Addition It has the typical properties of ketone carbonyl and can undergo nucleophilic addition reactions, such as reacting with hydroxylamine to form oxime and reacting with hydrazine to form hydrazone.
- Reduction Reaction It can undergo reduction reaction and can be reduced to the corresponding alcohol.
Frequently Asked Questions
Q1 What is the molecular structure of 1,3-cyclohexanedione?
It contains two carbonyl groups (C=O) located at the 1st and 3rd positions of the cyclohexane ring. This configuration forms a conjugated system that influences its chemical and physical properties.
Q2 Why are the alpha-hydrogen atoms in this compound highly active?
The hydrogen atoms (α-hydrogen) adjacent to the carbonyl groups on the cyclohexane ring have higher activity because they are positioned next to two strongly electron-withdrawing carbonyl groups, making them the active centers for chemical reactions.
Q3 What condensation reactions can 1,3-cyclohexanedione undergo?
Under alkaline conditions, it undergoes aldol condensation reactions with aldehydes and ketones. It can also undergo Knoevenagel condensation reactions with diethyl malonate when catalyzed by sodium alcohol.
Q4 How does 1,3-cyclohexanedione react with nucleophiles?
Due to its typical ketone carbonyl properties, it undergoes nucleophilic addition reactions. For instance, it reacts with hydroxylamine to form oxime and with hydrazine to form hydrazone.
Q5 Can 1,3-cyclohexanedione be reduced?
Yes, it can undergo reduction reactions to be converted into its corresponding alcohol form.