& Boron | Hot Paper| Synthesis, Structure, and Reactivity of Anionic sp 2 –sp 3 Diboron Compounds: Readily Accessible Boryl Nucleophiles Sabrina Pietsch, [a] Emily C. Neeve, [a] David C. Apperley, [b] Rüdiger Bertermann, [a] Fanyang Mo, [e] Di Qiu, [e] Man Sing Cheung, [c] Li Dang, [c] Jianbo Wang, [e] Udo Radius, [a] Zhenyang Lin,* [c] Christian Kleeberg ,* [b, d] and Todd B. Marder* [a, b] Chem. Eur. J. 2015, 21, 7082 – 7099 # 2015 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim 7082 Full Paper DOI: 10.1002/chem.201500235