Borane dimethylamine complex

Updated: 2026-10-18

Overview

Borane dimethylamine complex is a stable, solid adduct formed between borane (BH3) and dimethylamine. This complex overcomes the handling difficulties associated with pure borane, which is highly reactive and pyrophoric. The compound serves as a convenient source of borane for various chemical transformations. First developed in the mid-20th century, this complex has become a workhorse reducing agent in organic chemistry and industrial processes. Its stability allows for safer storage and transportation while maintaining useful reducing capabilities when needed.

Physical and Chemical Properties

The complex exists as white to off-white crystals at room temperature, with a relatively low melting point around 35-37°C. Unlike pure borane, it is not spontaneously flammable in air, though it should still be handled under inert conditions to prevent decomposition. Chemically, the compound acts as a source of borane through dissociation. The B-N bond is relatively weak (approximately 21 kcal/mol), allowing controlled release of borane at elevated temperatures or in solution. The complex shows good solubility in both water and common organic solvents like THF and ethers.

Main Applications

In organic synthesis, the complex serves as a selective reducing agent for carbonyl groups, especially in the reduction of carboxylic acids to alcohols. It finds particular use in pharmaceutical intermediates where mild conditions are required. Industrial applications include its use as a polymerization catalyst for olefins and as a component in electroless nickel plating baths. The electronics industry employs it for depositing thin films and in semiconductor manufacturing processes. Emerging applications include hydrogen storage systems due to its relatively high hydrogen content.

Safety and Storage

While significantly safer than pure borane, the complex still requires careful handling. It should be stored under nitrogen or argon in a cool, dry place, protected from moisture and strong oxidizers. Containers should be vented to prevent pressure buildup from hydrogen gas generation. Personal protective equipment including gloves and eye protection is recommended when handling. In case of exposure, affected areas should be flushed with copious water. The compound should not be heated above 50°C as this may cause rapid decomposition with release of flammable gases.

B2B Procurement Guide

For procurement, specify required purity (typically 95-98% for most applications) and preferred packaging (often 1-5 kg bottles or 25 kg drums). Technical grade (90-95%) may be suitable for industrial applications at lower cost. Verify supplier reliability through certificates of analysis and material safety data sheets. Consider regional suppliers to reduce shipping costs and hazards. Bulk purchases may offer better pricing but require proper storage facilities. Some suppliers offer customized solutions for specific industrial needs.