what are Polyhedral Boranes

In a large number of compounds containing boron and hydrogen, the boron atoms are arranged in the form of a well-defi ned polyhedron (octahedron, square antiprism, bicapped square antiprism, icosahedron, etc.). In these structures, the boron atoms are most often bonded to four, fi ve, or six other atoms. The most common structure is the icosahedron exhibited by the species B 12 H 12 2  . This structure consists of a B 12 icosahedron with a hydrogen atom bonded to each boron atom and the overall structure having a  2 charge. It is prepared by the reaction of B 2 H 6 with a base, which aids in the removal of hydrogen.In a large number of compounds containing boron and hydrogen, the boron atoms are arranged in the form of a well-defi ned polyhedron (octahedron, square antiprism, bicapped square antiprism, icosahedron, etc.). In these structures, the boron atoms are most often bonded to four, fi ve, or six other atoms. The most common structure is the icosahedron exhibited by the species B 12 H 12 2  . This structure consists of a B 12 icosahedron with a hydrogen atom bonded to each boron atom and the overall structure having a  2 charge. It is prepared by the reaction of B 2 H 6 with a base, which aids in the removal of hydrogen.