Description

2,4-Cyclopentadiene-1-Carbonyl Chloride, 1,2,3,4,5-Pentamethyl- (9Ci) is a highly functionalized cyclopentadienyl derivative, specifically an acyl chloride, which serves as a critical building block in advanced organic synthesis. Its value lies in its unique pentamethyl-substituted cyclopentadienyl structure, which provides steric bulk and electronic tuning for the synthesis of specialized ligands and organometallic complexes. This compound is essential for researchers and manufacturers in the fields of organometallic chemistry, catalysis, and materials science, where it is used to create novel catalysts and functional polymers.

Application

• Organometallic Catalyst Synthesis: A key precursor for the preparation of pentamethylcyclopentadienyl (Cp*) ligands used in homogeneous catalysis, particularly for olefin polymerization and fine chemical synthesis.
• Pharmaceutical Intermediates: Serves as a specialized building block in the synthesis of complex, high-value active pharmaceutical ingredients (APIs) and drug candidates.
• Advanced Material Development: Used in the research and production of novel polymeric materials, metal-organic frameworks (MOFs), and other functional materials with tailored properties.
• Ligand Design for Transition Metals: Facilitates the creation of sterically demanding and electronically modified ligands for ruthenium, rhodium, iridium, and other transition metal complexes.
• Agrochemical Research: Employed in the development of new, high-performance crop protection agents and plant growth regulators.
• Academic & Industrial R&D: A vital reagent for exploratory chemistry in university laboratories and corporate R&D centers focused on catalysis and new chemical entities.

Basic Information

Product Name	2,4-Cyclopentadiene-1-Carbonyl Chloride, 1,2,3,4,5-Pentamethyl- (9Ci)
CAS No.	108561-47-3
Molecular Formula	C11H15ClO
Molecular Weight	198.69 g/mol
Synonyms	1,2,3,4,5-Pentamethylcyclopenta-2,4-dien-1-carbonyl Chloride; Pentamethylcyclopentadienylcarbonyl Chloride; Cp*COCl; (Pentamethylcyclopentadienyl)carbonyl Chloride; 1-Carbonylchloride-1,2,3,4,5-pentamethyl-2,4-cyclopentadiene
EINECS	Contact for details

Quality Control

Our production of 2,4-Cyclopentadiene-1-Carbonyl Chloride, 1,2,3,4,5-Pentamethyl- adheres to stringent quality protocols to ensure batch-to-batch consistency and high purity for sensitive synthetic applications. All materials are characterized by modern analytical techniques including NMR, IR, and GC/HPLC. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with each shipment to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). Due to its moisture-sensitive (hygroscopic) nature, containers must be kept tightly sealed under an inert atmosphere (e.g., nitrogen or argon) after opening to prevent hydrolysis. Keep away from strong bases and oxidizing agents.

Specification

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

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