Macropolyhedral boron-containing cluster chemistry: The reaction of syn-B18H22 with SMe2 and I2 in monoglyme: Structure of [7-(SMe2)-syn-B18H20]

In contrast to the ready addition of ligands to nido single-cluster B10H14 the addition of a ligand onto nido: nido double cluster B18H22 needs an oxidizing agent: thus deprotonation of syn-B18H22 followed by treatment with I2 and SMe2 gives [7-(SMe2)-syn-B18H20].