Macropolyhedral boron-containing cluster chemistry. Nineteen-vertex [S2B17H17(SMe2)]. An unusual apical boron atom of cluster connectivity six that introduces a new polyhedral borane building block

Abstract

Mild thermolysis of [SB₈H₁₀(SMe₂)] results in the formation of a small amount of macropolyhedral [S₂B₁₇H₁₇(SMe₂)] of which the stucture is based on the fusion, with two boron atoms in common, of a conventional nido-type eleven-vertex {SB₁₀H₉} subcluster with an unprecedented arachno-type ten-vertex {SB₉H₈(SMe₂)} subcluster that exhibits an apical boron atom of cluster connectivity six.