3-Butyl-1-methylcyclopenta-1,3-diene

CAS Number 184687-62-5
Molecular Formula C₁₀H₁₆
Molecular Weight 136.23 g/mol
Purity ≥99.0%
Appearance Pale yellow liquid

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Product Description

3-Butyl-1-methylcyclopenta-1,3-diene is a cyclopentadiene derivative features a five-membered ring with conjugated double bonds at positions 1-2 and 3-4, a methyl group at position 1, and a butyl group at position 3. It is expected to exhibit typical reactivity of cyclopentadiene compounds, such as Diels-Alder reactions and polymerization reactions. 3-Butyl-1-methylcyclopenta-1,3-diene can be used as an intermediate in organic synthesis to construct complex molecular frameworks or as a ligand in metal-catalyzed reactions. It may also have applications in materials science for polymer modification or the development of functional materials.

Synthesis Methods

  • Alkylation: Cyclopentadiene can be reacted with an alkyl halide (e.g., butyl bromide) under alkaline conditions.

  • Cycloaddition: Utilizes the [4+2] cycloaddition reaction of cyclopentadiene with alkenes or alkynes to construct ring systems.

Uses

  • Organic Synthesis Intermediate: Used to construct complex molecular frameworks or as a ligand in metal-catalyzed reactions.

  • Materials Science: Can be used for polymer modification or the development of functional materials.

  • Organometallic Chemistry: Serves as a precursor for cyclopentadienyl ligands in transition metal chemistry, such as in the preparation of metallocene catalysts.

Molecular Structure

  • Molecular Formula: C10H16

  • SMILES: CCCCC1=CCC(=C1)C

  • InChI Key: OSRFUMBNIRJIKU-UHFFFAOYSA-N

  • IUPAC Name: 3-Butyl-1-methylcyclopenta-1,3-diene (alternative name: 1-Butyl-3-methylcyclopenta-1,3-diene)

  • Structure: The compound features a five-membered ring with conjugated double bonds at positions 1-2 and 3-4, a methyl group at position 1, and a butyl group at position 3.

Physical Properties

  • Molecular Weight: 136.23 g/mol

  • Physical State: Likely a colorless liquid at room temperature.

  • Boiling Point: Between 40-150°C (estimated based on similar compounds).

  • Density: Approximately 0.7-0.9 g/cm³ (less than water).

  • Solubility: Insoluble in water, soluble in organic solvents.

Chemical Reactivity

  • Reactivity: Exhibits typical reactivity of cyclopentadiene compounds, such as Diels-Alder reactions and polymerization reactions.

  • Stability: May dimerize at room temperature to form dicyclopentadiene structures, but derivatives with substituents may be more stable.

Safety Information

  • Hazards: Presumed to be a flammable liquid (flash point may be below 60°C). Avoid contact with oxidants and ignition sources.

  • Storage: Recommended to be sealed, stored in a cool, well-ventilated area, away from heat sources and incompatible materials.

Regulatory Information

  • CAS Number: 184687-62-5

  • EPA TSCA Status: Active under the Toxic Substances Control Act (TSCA).

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