Stabilized Metal Hydrides, Method of Preparation and Use Thereof

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This invention discloses new stabilized metal hydrides of boron or aluminum, complexed with specific phosphine ligands where at least one ligand is an aryl group. These stabilized hydrides are less hazardous, more stable in air and in solution, and act as selective reduction agents or efficient hydrogen storage materials. The patent also describes methods for their preparation and their use primarily in organic synthesis and as hydrogen sources.

Use CasesContent extracted from patent full text and abstract with AI.

• As a selective reducing agent in organic synthesis to convert carbonyl compounds to aldehydes, alcohols, or amines with high precision and safety.
• As a hydrogen storage material in transportation (e.g., fuel cells for vehicles, rockets) and stationary energy systems due to their safe and efficient hydrogen release properties.
• For the synthesis of new materials and energetic compounds (such as fuels or networked organic-inorganic compounds) where controlled hydride transfer is needed.
• In laboratories or industrial settings requiring safer and longer-lived alternatives to traditional metal hydride reagents like LiAlH4 or DIBAL.

BenefitsContent extracted from patent full text and abstract with AI.

• Improved stability compared to traditional metal hydrides—less prone to decomposition, polymerization, or hazardous reactivity (less pyrophoric and safer to handle).
• Greater selectivity in reduction reactions, allowing finer control over chemical syntheses and avoiding over-reduction.
• Enhanced air and moisture tolerance enables safer storage and easier handling, both as solids and in solution.
• Hydrogen can be released cleanly at relatively low temperatures, offering value for hydrogen storage and fuel applications.
• Ligands can be recovered and reused, making the chemical processes more cost-effective and resource-efficient.
• Crystalline forms allow for more convenient dosing and handling in practical applications.

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Patent Abstract

The invention relates to metal hydrides of the general formula H3Me·(PL3)y wherein Me = Al or B, wherein L = alkyl and/or aryl and wherein y = 2, 3, at least one of the three ligands L in PL3 being an aryl group. The invention also relates to a method of preparing same and use thereof.