Description

Benzonitrile, 3,4-Diethynyl- (9Ci) is a specialized aromatic nitrile derivative featuring two ethynyl substituents, offering a unique combination of a rigid benzonitrile core with highly reactive terminal alkyne functional groups. This compound matters as a versatile and high-value building block for advanced material synthesis, enabling the construction of complex molecular architectures through coupling reactions. It is primarily needed by researchers and manufacturers in the fields of pharmaceutical intermediates, organic electronics, and polymer chemistry.

Application

• Pharmaceutical Intermediate: Serves as a key synthon for the development of novel active pharmaceutical ingredients (APIs), particularly in constructing conjugated systems for targeted therapies.
• Organic Semiconductor Precursor: Used in the synthesis of conjugated small molecules and polymers for applications in organic light-emitting diodes (OLEDs), field-effect transistors (OFETs), and photovoltaics.
• Metal-Organic Framework (MOF) Linker: The ethynyl groups act as coordination sites or can be further functionalized to create porous materials for gas storage, separation, or catalysis.
• Click Chemistry Substrate: Ideal for copper-catalyzed azide-alkyne cycloaddition (CuAAC) reactions, facilitating the modular construction of complex molecules for drug discovery and material science.
• Liquid Crystal & Advanced Polymer Monomer: Incorporated into rigid-rod polymers or liquid crystalline materials to tailor thermal, mechanical, and optical properties.
• Chemical Research & Development: Employed in academic and industrial R&D for exploring new synthetic methodologies and creating functional materials with customized properties.

Basic Information

Product Name	Benzonitrile, 3,4-Diethynyl- (9Ci)
CAS No.	302346-43-6
Molecular Formula	C11H5N
Molecular Weight	151.16 g/mol
Synonyms	3,4-Diethynylbenzonitrile; 1,2-Diethynyl-4-cyanobenzene; 4-Cyano-1,2-diethynylbenzene; Benzonitrile, 3,4-diethynyl-; 3,4-Bis(ethynyl)benzonitrile; 3,4-Diethynylbenzenecarbonitrile
EINECS	Contact for details

Quality Control

Our Benzonitrile, 3,4-Diethynyl- (9Ci) is produced under strict quality management protocols. Each batch undergoes rigorous analytical testing to ensure high purity and consistency. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing key parameters such as assay, identity, and impurity profiles. Our quality commitment supports applications requiring reliable and reproducible performance in sensitive synthetic processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from heat, sparks, and open flames. Due to the reactive ethynyl groups, prolonged exposure to air should be minimized. For long-term storage, consider storing under an inert atmosphere such as nitrogen or argon.

Specification

Item	Specification
Appearance	Off-white to light yellow crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 97.0%
Melting Point	Contact for details
Water Content (KF)	≤ 0.5%
Residue on Ignition	≤ 0.1%

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