Darstellung und Charakterisierung von Thiocyanatderivaten der Hydroboratanionen B10H102− und B12H122−

Preparation and Characterization of Thiocyanate Derivatives of the Hydroborate Anions B₁₀H₁₀^2? and B₁₂H₁₂^2? The reaction of B₁₀H₁₀^2? or B₁₂H₁₂^2? with (SCN)₂ in dichloromethane yields mixtures of thiocyanatohydroborates from which the pure isomers 1-and 2-(SCN)B₁₀H₉^2?, 1, 10-(SCN)₂B₁₀H₈^2?, and 1-(SCN)B₁₂H₁₁^2? are isolated by ion exchange chromatography on diethylaminoethyl cellulose. The structures are determined by ¹¹B and ¹¹B{¹H}NMR spectroscopy. There are characteristic chemical shifts due to apical and equatorial substituents, respectively. In B₁₀H₁₀^2? the substitution at apical positions is prefered. The IR and Raman spectra are similar to those of isosteric halogeno derivatives in the region of ν(BH) and of the borate cages. Because of the high frequencies of ν(CN): 2120–2140 cm^?1 S coordination of SCN^? is supposed.