Isolation, structure and reactivity of a scandium boryl oxycarbene complex† †Electronic supplementary information (ESI) available: Synthesis, characterization of compounds 2 – 7. CCDC 981561–981563, 1042268 and 1042269. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c5sc03138a Click here for additional data file. Click here for additional data file.

Experimental Section S3 Synthesis and Characterization of Scandium Boryl Carbene Complex (2) S4 Synthesis and Characterization of Phenylamido Enolate Complex (3) S4 13C-Labeled Experiments for Complex 3 S5 Synthesis and Characterization of Scandium Alkoxide Complex (4) S5 Synthesis and Characterization of Scandium Pyridyl Complex (5) S6 Figure S1. ORTEP drawings of 5 S6 Synthesis and Characterization of Scandium Methyl-Pyridyl Complex (6) (Complex 5) S7 Synthesis and Characterization of Scandium Cyclopropyl Complex (7) 6) S7 Figure S2. 13C NMR spectrum of 2 S8 Figure S3. 13C NMR spectrum of 2-13C S8 Figure S4. 13C NMR spectrum of 3 S8 Figure S5. 13C NMR spectrum of 3-C2 S9 Table S1. Crystal data and structure refinement for complex 5 S10 Table S2. Atomic coordinates and equivalent isotropic displacement parameters for complex 5 S11