3-Methyl-1.2-cyclopentanedione

• CAT Number: R070768
• CAS Number: 765-70-8
• Molecular Formula: C6H8O2
• Molecular Weight: 112.13
• Purity: ≥95%
• Synonyms: 2-Hydroxy-3-methyl-2-cyclopenten-1-one
• Storage: RT
• IUPAC Name: 3-methylcyclopentane-1,2-dione
• InChI: InChI=1S/C6H8O2/c1-4-2-3-5(7)6(4)8/h4H,2-3H2,1H3
• InChIKey: OACYKCIZDVVNJL-UHFFFAOYSA-N
• SMILES: CC1CCC(=O)C1=O

3-Methyl-1,2-cyclopentanedione（Cat No.:R070768）is a cyclic diketone with the molecular formula C6H8O2, featuring a five-membered cyclopentane ring bearing two adjacent ketone groups at the 1 and 2 positions and a methyl substituent at the 3-position. It appears as a yellow crystalline solid or oily liquid and is notable for its enol-keto tautomerism, which influences its chemical reactivity. This compound is used as an intermediate in organic synthesis, particularly in the preparation of heterocycles, pharmaceuticals, and flavoring agents. Its conjugated system also makes it a valuable model for studying electron delocalization and ring strain.