A new paper has been accepted for publication and is now online on the ChemPhysChem website [ChemPhysChem 12, 1673 (2011)]. The article “Natural orbital functional theory and reactivity studies of diradical rearrangements: ethylene torsion as a case study” by X. Lopez, M. Piris, J. M. Matxain, F. Ruipérez and J. M. Ugalde can now be accesed at doi: 10.1002/cphc.201100190