M[B(CN)₄]₂: Zwei neue Tetracyanoborate mit zweiwertigen Kationen (M = Zn, Cu)

Abstract

Abstract M[B(CN) 4 ] 2 : Two new Tetracyanoborate Compounds with divalent Cations (M = Zn, Cu) The reaction of ZnO or CuO with [H 3 O][B(CN) 4 ] in aqueous solution yielded single crystals of Zn[B(CN) 4 ] 2 and Cu[B(CN) 4 ] 2 , respectively. The compounds were characterized by single‐crystal X‐ray diffraction. Zn[B(CN) 4 ] 2 ( $P{\bar 3}m{\rm 1}$ (no. 164), a = b = 7.5092(9) Å, c = 6.0159(6) Å, Z = 1) crystallizes isotypic with Hg[B(CN) 4 ] 2 . The structure of Cu[B(CN) 4 ] 2 ( C 2/ m (no. 12), a = 13.185(3) Å, b = 7.2919(9) Å, c = 6.029(1) Å, β = 93.02(2)°, Z = 2) can be considered as a super‐structure, resulting from Jahn‐Teller distortion of the Cu 2+ ions. Magnetic measurements were performed for the copper compound. Vibrational spectra and thermal stabilities were compared with the known mercury(II) tetracyanoborate.