Supporting Information Synthesis, Characterization and Magnetic Properties of Head-to-Head Stacked Vanadocenes Sarah Puhl, a Torben Steenbock, a Reentje Harms, a Carmen Herrmann, a and Jürgen Heck ∗a a Institute of Inorganic and Applied Chemistry, University of Hamburg, Martin-Luther-King-Platz 6, 20146 Hamburg, Germany herrmann@chemie.uni-hamburg.de ; heck@chemie.uni-hamburg.de Broken-Symmetry structure of 3 E tot = -3046.31948234331 a.u. V 5.87133800 4.54895000 1.56754100 C 8.04164900 5.19458500 1.97157700 C 7.55310900 4.46394200 3.09336500 C 7.25834600 3.14105900 2.67788200 C 7.54263300 3.04278500 1.29148600 C 8.01163200 4.30732300 0.85259700 H 8.33513200 4.55313000 -0.14869500 C 3.83468700 5.16533800 2.37243400 C 4.27841400 6.17532000 1.47928200 H 4.49878900 7.20047400 1.73896600 C 4.39186000 5.59839600 0.18684800 H 4.69945100 6.11059300 -0.71332900 C 4.01860700 4.23150500 0.28158800 C 3.67401600 3.96402000 1.63237000 C 8.43583700 6.61946400 1.92946400 H 7.43702800 4.85503400 4.09287600 H 6.87669900 2.35045400 3.30719500 H 7.42472700 2.16219600 0.67678200 H 3.65410200 5.28861300 3.43033600 H 3.99992000 3.52059800 -0.53169800 H 3.34883000 3.01276200 2.02791900 C 7.95866600 7.37241100 0.86897800 C 9.19044100 7.27682600 2.96388600 H 7.39159900 6.86402500 0.09627400 C 8.09904300 8.76650000 0.80685300 C 9.94506800 6.61942500 3.99832400 C 9.19045300 8.71629200 2.96391000 H 7.70515000 9.30981300 -0.04453800 1 Electronic Supplementary Material (ESI) for Dalton Transactions. This journal is © The Royal Society of Chemistry 2017