s-block Carbodicarbene Chemistry: C(sp 3 )−H Activation and Cyclization Mediated by a Beryllium Center Jacob E. Walley, Grace Breiner, Guocang Wang, Diane A. Dickie, Andrew Molino, Jason L. Dutton, David J. D. Wilson, * Robert J. Gilliard* Supporting Information Table of Contents General Procedures S2 Experimental Procedures S2 NMR Spectra for Compound 1-3 S3-S7 1 H NMR Reaction Studies S8-S13 IR Spectra S14-S16 Computational Modeling S17-S23 X-ray Crystal Data S24 References S25 Electronic Supplementary Material (ESI) for Chemical Communications. This journal is © The Royal Society of Chemistry 2019