Mitsui Plastics

EVONIK

C8 Monomers Cyclic Building Blocks

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Meet the Evonik C8 Cyclic Family

Engineered for Precision Synthesis and Advanced Materials

Evonik’s C8 cyclic portfolio—Cyclooctene (COE), 1,5-Cyclooctadiene (COD), and 4‑Vinylcyclohex‑1‑ene (VCH) – offers a consistent platform of defined ring structures and tunable unsaturation to support polymers, specialty chemicals, organometallic chemistry, and high-value intermediates

When your formulation or synthesis demands a compact hydrocarbon scaffold with controlled functionality, C8 cyclic intermediates deliver. This Evonik family provides structural stability, well-defined unsaturation, and reliable performance, enabling customers to select the right balance of reactivity and selectivity—from polymer and rubber innovation to organometallic complex synthesis and specialty intermediates.

  • COE – Cyclooctene: Balanced reactivity + ring stability for polymer intermediates and functionalization 
  • COD – 1,5-Cyclooctadiene: Diene reactivity for ligands, catalysis, and organometallic complexes 
  • VCH – 4‑Vinylcyclohex‑1‑ene: Reactive vinyl + cyclic structure for specialty synthesis and polymer modification
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    Cyclooctene (COE)

    Cyclooctene is a singly unsaturated, eight-membered cyclic hydrocarbon valued for its balanced reactivity and structural stability. Its internal double bond enables precise functionalization, making it a preferred intermediate for polymers, specialty chemicals, and advanced materials. 

    Key Applications:

    • Feedstock for metathesis polymerization to produce polyoctenamer rubber 
    • Building block for fragrance ingredients and functional intermediates 
    • Reliable C8 platform for high-value synthesis pathways 

    Why COE?

    • Predictable performance supports reproducible outcomes in synthesis and scale-up 
    • Consistent quality for dependable downstream processing 
    • Internal double bond enables controlled functionalization routes 
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    1,5‑Cyclooctadiene (COD)

    1,5‑Cyclooctadiene (COD) is a high-purity, colorless liquid recognized for its unique structure and exceptional reactivity. With two double bonds in an eight-membered ring, it is widely used as a ligand and intermediate for organometallic complexes and advanced synthesis. 

    Key Applications:

    • Ligand to stabilize transition metal centers in homogeneous catalysis 
    • Enables efficient chemical transformations in pharmaceuticals, fine chemicals, and specialty polymers 
    • Reactive building block for specialty chemicals and advanced materials 

    Why COD?

    • Exceptional ligand performance for demanding catalytic systems 
    • Versatile diene structure enables tailored modification and design flexibility 
    • High purity & consistency manufactured to rigorous standards for reliable results

     

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    4‑Vinylcyclohex‑1‑ene (VCH)

    Vinylcyclohexene is a doubly unsaturated cyclic C8 hydrocarbon combining a highly reactive vinyl group with a stable ring structure. This makes VCH a valuable building block for selective polymer modification and targeted chemical synthesis.

    Key Applications:

    • Intermediate for flame retardants and specialty chemicals 
    • Polymerization modulator and polymer modification pathways 
    • Precursor suitable for hydrogenation or further functionalization routes

    Why VCH?

    • Selective reactivity driven by the vinyl group + ring design 
    • Versatile precursor for multiple downstream transformations 
    • Consistent quality and well-defined reactivity for advanced materials development

    Let’s Match The Right C8 Building Block To Your Chemistry

    Tell us your target application (polymer, catalyst/ligand, specialty intermediate, coatings/adhesives, etc.) and desired volume. A Mitsui Plastics specialist will follow up with availability, documentation, and next steps.

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