Boron atoms as spin carriers in two- and three-dimensional systems

INOR 465

Wolfgang Kaim, kaim@iac.uni-stuttgart.de, Department of Inorganic Chemistry, Stuttgart University, Pfaffenwaldring 55, 70550 Stuttgart, Germany and Stanislav Zalis, J. Heyrovsky Institute, Prague, Czech Republic.
Paramagnetic compounds with boron-centered spins can be constructed using (i) B as electron accepting atoms bridged by planar organic conjugated systems L in molecules such as [(R3B)(L)(BR3)].-, [(R2B)(L)(BR2)].- or [(R2B)(L)(BR2)].+, or by taking advantage of 3D delocalized bonding in (ii) borane, haloborane, or metalloborane clusters. Special attention will be given to the radical anions [Bn(Hal)n].-, n = 6, 9 and 12 which have been analyzed using DFT calculations. On the other hand, the concept of mixed-valency can be applied to the organo-bridged diboranes (i).