Structure D 2000Tetracyanoborate Salts M[B(CN) 4 ] with M = Singly Charged Cations: Properties and Structures. -The single crystal X-ray structures, vibrational spectra, solubilities in water, and thermal stabilities of (III), (V), and (VIII) are determined and compared with already known M[B(CN)4] salts. (Ib) crystallizes in the cubic space group Fd3m with Z = 8, (IIIa) and (VIII) in the cubic space group P43m with Z = 1, (IIIb), (V), Cs[B(CN) 4 ], and NH 4 [B(CN) 4 ] in the tetragonal space group I4 1 /a with Z = 4, and the THF adducts Na[B(CN)4]·THF and NH4[B(CN)4]·THF in the orthorhombic space group Pnma with Z = 4. The latter two phases are not isostructural. The cubic structures of the Li + , Na + , and Cu + salts consist of two interpenetrating independent tetrahedral networks of M + cations and [B(CN)4]ions. In the vibrational spectra the two CN stretching modes A 1 and T 2 coincide in general and the band positions are a measure for the strength of the interionic interaction. An interesting feature in the Raman spectrum of the copper salt is the first appearance of two CN stretching modes. -(KUEPPERS, T.; BERNHARDT, E.; WILLNER*, H.; ROHM, H. W.; KOECKERLING, M.; Inorg. Chem. 44 (2005) 4, 1015-1022; Fachbereich 9, Anorg. Chem.
Copper I 7400 M[B(CN) 4 ] 2 : Two New Tetracyanoborate Compounds with Divalent Cations (M: Zn, Cu). -The structures of the title compounds are determined by single crystal XRD. (IIa) crystallizes in the trigonal space group P3m1 with Z = 1 and is isotypic with Hg[B(CN)4]2. The structure of (IIb) (monoclinic, space group C2/m, Z = 2) can be considered as a superstructure resulting from Jahn-Teller distortion of the Cu 2+ ions. The IR and Raman spectra of the new tetracyanoborates are given. -(NEUKIRCH, M.; TRAGL, S.; MEYER*, H.-J.; KUEPPERS, T.; WILLNER, H.; Z. Anorg. Allg. Chem. 632 (2006) 6, 939-944; Inst. Anorg. Chem., Eberhard-Karls-Univ., D-72076 Tuebingen, Germany; Ger., Abstr. Eng.) -Schramke 28-023
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