Supporting Information for Fixation of carbon dioxide and related small molecules by a bifunctional frustrated pyrazolylborane Lewis pair Eileen Theuergarten, Janin Schlösser, Danny Schlüns, Matthias Freytag, Constantin G. Daniliuc, Peter G. Jones and Matthias Tamm * * Institut für Anorganische und Analytische Chemie, Technische Universität Carolo-Wilhelmina, Hagenring 30, D-38106 Braunschweig, Germany. Fax: +49 (251) 391-5309; Tel: +49 (251) 391-5387; E-mail: m.tamm@tu-bs.de Contents: 1. Computational Details 2. Energies of all optimized structures 3. Figure S1: Relative energies of stationary points on the 1 + CO 2 hypersurface. 4. Calculated structures and XYZ coordinates Electronic Supplementary Material (ESI) for Dalton Transactions This journal is © The Royal Society of Chemistry 2012