Mechanisms and Processes for Conversion of Smaller Boranes to Larger Boranes or Borane Fragments

摘要

Successful isolation and characterization of Me3NB4H8 revealed an aspect of the base catalysis of borane condensation, and triggered the discovery of new hypho class compounds B4H8(2PMe3) and B3H5(3PMe3). Formation of a new class (klado) of compound B4H6(4PMe3) was confirmed also. These higher class compounds are promising reagents for borane expansion. A triborane cation, (B3H6(PMe3)2)+, was prepared from B2H4(2PMe3). The diborane(4) adduct can be used as a reagent for borane expansion. An attempted conversion of B5H9 to B10H14 is described. (Author)