Azacyclononane
Overview
Azacyclononane is a nine-membered nitrogen-containing heterocyclic compound, classified as a secondary amine. It is structurally related to azepane but with an expanded ring size. This compound is primarily utilized in academic and industrial research due to its role as a ligand in coordination chemistry and as a scaffold in organic synthesis. Its unique ring structure and nitrogen lone pair make it valuable for forming complexes with transition metals, which are often employed in catalytic reactions. The compound is typically synthesized through ring-closure reactions of appropriately substituted linear precursors.
Physical and Chemical Properties
Azacyclononane is a colorless to pale yellow liquid at room temperature with a characteristic amine-like odor. Its boiling point ranges between 180-182°C, and it exhibits moderate solubility in polar organic solvents such as ethanol and acetone. The compound is only slightly soluble in water due to its hydrophobic ring structure. The nitrogen atom in the ring confers basicity, allowing it to form salts with acids. Azacyclononane is stable under normal conditions but may degrade when exposed to strong oxidizers. Its density is approximately 0.89 g/cm³, lighter than water, and it has a molecular weight of 127.23 g/mol.
Main Applications
In coordination chemistry, azacyclononane serves as a versatile ligand, forming stable complexes with metals like palladium, platinum, and nickel. These complexes are often used as catalysts in cross-coupling reactions and hydrogenation processes. Pharmaceutical researchers employ azacyclononane as a building block for drug discovery, particularly in developing compounds with modified pharmacokinetic properties. The ring expansion compared to smaller heterocycles can influence bioavailability and metabolic stability. Additionally, it finds use in materials science for creating specialty polymers with tailored properties.
Safety and Storage
Azacyclononane is classified as an irritant to skin, eyes, and respiratory system. Proper personal protective equipment (PPE) including nitrile gloves, safety goggles, and lab coats should be worn when handling. Work should be conducted in a fume hood to avoid inhalation of vapors. For storage, keep containers tightly sealed in a cool (below 25°C), dry place away from incompatible substances such as strong acids and oxidizers. Secondary containment is recommended to prevent accidental spills. Shelf life is typically 2-3 years when stored properly in amber glass or approved plastic containers.
B2B Procurement Guide
Industrial buyers should prioritize suppliers who provide detailed certificates of analysis (CoA) specifying purity (typically ≥98%), water content, and residual solvents. Bulk quantities (25kg drums or larger) often offer better pricing for manufacturing applications. Key procurement considerations include verifying the supplier's quality control processes, batch-to-batch consistency, and compliance with relevant regulations (e.g., REACH). For international shipments, ensure proper hazardous material classification and documentation. Some suppliers offer custom synthesis and derivatization services for specialized applications.
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