Darstellung, 11B-NMR- und Schwingungsspektren von Aminohexahydro-closo-hexaborat(1–), [B6H6(NH2)]- sowie Kristallstruktur von Cs[B6H6(NH2)] · H2O / Preparation, 11B NMR and Vibrational Spectra of Aminohexahydro-closo-hexaborate(1–), [B6H6(NH2)]-, and the Crystal Structure of Cs[B6H6(NH2)] · H2O
Abstract
Aminohexahydro-closo-hexaborate(1–), Crystal Structure, 11 B NMR Spectra, Vibrational Spectra By reduction of [B 6 H 5 (NO 2 )] 2- with Fe 2+ in aqueous alkaline solution [B 6 H 6 (NH 2 )]- is formed. The compound has been separated by extraction with dichloromethane in the presence of tetrabutylammoniumbromid and precipitated from the organic phase by adding CsCH 3 COO/C 2 H 5 OH. The Crystal structure of Cs[B 6 H 6 (NH 2 )] · H 2 O has been determined by single crystal X-ray diffraction analysis; monoclinic space group C2 with a = 22.1075(14), b = 6.491(2), c = 5.9570(4) A, β = 100.168(6)°. The 11 B NMR spectrum is consistent with a mono-hetero-substituted octahedral B 6 cage with local C 4v symmetry. The IR and Raman spectra exhibit characteristic N–H, B–H and B 6 vibrations.
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