1. Department of Chemistry, University of Guelph, Guelph, Ontario N1G 2W1, Canada
2. 185 Chelsea Avenue, London, Ontario N6J 3J5, Canada
3. Laboratorium für Festkörperphysik, ETH Zürich, 8093 Zürich, Switzerland
4. CNRS, UPR 8641, Centre de Recherche Paul Pascal (CRPP), Equipe “Matériaux Moléculaires Magnétiques”, 115 avenue du Dr. Albert Schweitzer, Pessac, F-33600, France
5. Université de Bordeaux, UPR 8641, Pessac, F-33600, France