Crystal structure of 2,4,6,8,9,10-hexamethyl-2,4,6,8,9,10-hexabora-adamantane

Abstract

Crystals of the title compound are orthorhombic, with a= 16.184(1), b= 13.251 (1), c= 6.999(1)Å, Z= 4, space group Pnma. The structure was solved by the symbolic-addition procedure and refined by the method of least squares to R 0.06 for 639 observed reflections. The molecules have an adamantane-like structure with four carbon atoms lying near the corners of a tetrahedron and the six BMe groups lying above the edges. The molecular symmetry approximetes to 3m and the mean B–C distance is 1.564 Å.