Description

5-(2-Cyclopropen-1-Ylidene)-1,3-cyclopentadiene is a highly specialized, strained organic compound featuring a unique fused cyclopropene-cyclopentadiene structure. This compound serves as a valuable and versatile advanced synthetic intermediate for constructing complex molecular architectures in research and development. It is primarily sought by pharmaceutical, agrochemical, and advanced materials chemists for applications in catalysis, ligand design, and the synthesis of novel polycyclic frameworks.

Application

• Pharmaceutical Intermediate: Used in the research and synthesis of novel active pharmaceutical ingredients (APIs), particularly for creating strained-ring systems.
• Agrochemical Research: Serves as a key building block in developing new herbicides, fungicides, and insecticides with unique modes of action.
• Advanced Material Precursor: Employed in the synthesis of specialized ligands for organometallic catalysis and in the creation of novel organic electronic materials.
• Academic & Industrial R&D: A critical reagent for methodological studies in organic synthesis, including cycloaddition reactions and C-H activation research.
• Fine Chemical Synthesis: Utilized in the production of high-value, complex fine chemicals and specialty fragrances.

Basic Information

Product Name	5-(2-Cyclopropen-1-Ylidene)-1,3-Cyclopentadiene
CAS No.	6249-23-6
Molecular Formula	C8H6
Molecular Weight	102.14 g/mol
Synonyms	1,2,3,6-Tetrahydrofulvene; Bicyclo[3.1.0]hexa-1,3,5-triene; Fulvalene; 5-Cyclopropenylidene-1,3-cyclopentadiene; 1,3-Cyclopentadiene, 5-(2-cyclopropen-1-ylidene)-; 5-(Cycloprop-1-en-1-ylidene)cyclopenta-1,3-diene
EINECS	228-390-6

Quality Control

Our high-purity 5-(2-Cyclopropen-1-Ylidene)-1,3-cyclopentadiene is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical characterization, including NMR, GC/HPLC, and FTIR, to confirm identity and purity. A detailed Certificate of Analysis (COA) is provided with every shipment, ensuring traceability and compliance with your research and development specifications.

Storage

Preserve in a tightly closed container, protected from light. Store under an inert atmosphere (e.g., nitrogen or argon) at 2-8°C in a cool, dry, well-ventilated area. This material is sensitive to oxygen and moisture; prolonged exposure to air or elevated temperatures should be avoided to maintain stability.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Purity (GC)	≥ 95.0%
Purity (HPLC)	≥ 94.0%
Water Content (KF)	≤ 0.5%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.