Synthesis, vibrational spectrum and structure of the tetracyanoborate K[B(CN)(4)]center dot CH3CN

The new tetracyanoborate K[B(CN)(4)](CH3CN)-C-. was synthesized by dissolution of the solvent-free K[B(CN)(4)] in acetonitrile and subsequent careful crystallization. The crystal structure has been determined by single-crystal X-ray diffraction. It crystallizes in the orthorhombic space group P2(1)2(1)2(1) with Z = 4. Some comparisons with related structures are made, and the vibrational spectrum is discussed.