Coordination Networks Based on Nitrile‐Functionalized Borate Anions

Salts of cyano borates bear potential of forming coordination polymers with solvent‐filled voids as a source for porous materials. Herein we describe the synthesis and properties of novel cyano borates Na[H–B(O–C 12 H 8 –CN) 3 ], Na[B(O–C 12 H 8 –CN) 4 ] (C 12 H 8 = biphenyl) and Na[B{O–C 6 H 3 –(CN) 2 } 4 ], as well as a new modification of Na[B(O–C 6 H 4 –CN) 4 ]. Crystal structures of the sodium borates and the starting materials HO–C 6 H 3 –(CN) 2 and HO–C 12 H 8 –CN (new modification) are discussed as well. Data of nitrogen sorption experiments revealed a notable surface area in solvent‐free Na[H–B(O–C 12 H 8 –CN) 3 ].