1. Novel Topologies for Unpaired-Electron Interactions Przemyslaw Maslak, Department of Chemistry, Pennsylvania State University
The two halves of the spiro molecule participate in formation of two independent p stacks with close separations between aromatic rings. In the diradicals such an arrangement may yield electronically coupled stacks in two perpendicular dimension, increasing dimensionality of the interactions, and allowing for many alternative electronic paths for spin-spin interactions. Such materials should be much more robust magnets
In the nitroxyl diradicals, the singly-occupied molecular orbitals are spiroconjugated, allowing the unpaired electrons to delocalize in two dimensions (a HOMO is shown below).