Darstellung, 11B-NMR- und Schwingungsspektren von μ-Amido-bis(hexahydro-closo-hexaborat)(1-), und Kristallstruktur von [As(C6H5)4][B6H6(NH2)B6H6] / Preparation, 11B NMR and Vibrational Spectra of μ-Amido-bis(hexahydro-closo-hexaborate)(1-) and Crystal Structure of [As(C6H5)4][B6H6(NH2)B6H6]

Abstract

Abstract By reduction of [B6H3(NO)B6H5]3- with Fe2+ in aqueous alkaline solution [B6H3(NH2)B6H3]3- is formed. It reacts as a Brönsted base and becomes protonated in neutral medium to give the mono anion [B6H6(NH2)B6H 6]-. The crystal structure of the salt [As(C6H3)4][B6H6(NH2)B6H6] has been determined by single crystal X-ray diffraction analysis; triclinic space group P1̄ with a = 8.284(2), b = 12.619(2), c = 15.5 4 3 (3 )Å and α = 69.193(13)°; β = 88.59(2)°, γ = 87.24(2)°. The 11B NMR spectrum is consistent with mono hetero substituted octahedral B6 cages with local C4v symmetry. The IR and Raman spectra exhibit characteristic N-H , B-H and B6 vibrations.