Method of production of B10H102-ammonium salts and methods of production of B18H22

摘要

The invention provides new methods for synthesis of B₉H₉^-, B₁₀H₁₀^2-, B₁₁H₁₄^-, and B₁₂H₁₂^2- salts, particularly alkylammonium salts of B₉H₉^-, B₁₀H₁₀^2-, B₁₁H₁₄^-, and B₁₂H₁₂^2-. More particularly, the invention provides methods of preparing tetraalkylamronium salts of B₉H₉^-, B₁₀H₁₀^2-, B₁₁H₁₄^-, and B₁₂H₁₂^2- by pyrolysis of tetraalkylammonium borohydrides under controlled conditions. The invention additionally provides methods of preparing, in an atom efficient process, octadecaborane from the tetraalkylammonium salts of the invention. Preferred methods of the invention are suitable for preparation of isotopically enriched boranes, particularly isotopically enriched ¹⁰B₁₈H₂₂ and ¹¹B₁₈H₂₂.