Diverse chemistry of the dianion [ closo -B 9 H 9 ] 2− : synthesis and reactivity of its mono-anionic derivative [ arachno -B 9 H 12 -4,8-Cl 2 ]

Attempted protonation of the dianion [ closo -B 9 H 9 ] 2− under moisture-free conditions did not afford its mono-protonated form [ closo -B 9 H 10 ] − . The reaction of the former closo -borate with CH 3 COOH in dichloromethane yielded a monoanionic product [B 2 O(MeCO 2 ) 5 ] − . The treatment of...

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Bibliographic Details
Published in:New journal of chemistry 2018, Vol.42 (4), p.2553-2556
Main Authors: Schlüter, Florian, Bernhardt, Eduard, Zhizhin, Konstantin
Format: Article
Language:English
Subjects:
Ammonia
Chemical synthesis
Crystal structure
Dichloromethane
Liquid ammonia
NMR
Nuclear magnetic resonance
Protonation
Quantum chemistry
Single crystals
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Summary:Attempted protonation of the dianion [ closo -B 9 H 9 ] 2− under moisture-free conditions did not afford its mono-protonated form [ closo -B 9 H 10 ] − . The reaction of the former closo -borate with CH 3 COOH in dichloromethane yielded a monoanionic product [B 2 O(MeCO 2 ) 5 ] − . The treatment of [ closo -B 9 H 9 ] 2− with HCl in dichloromethane afforded its arachno -derivative [ arachno -B 9 H 12 -4,8-Cl 2 ] − in a high yield. The experimental solution and quantum-chemically calculated 11 B and 1 H NMR spectra of the latter monoanion were found to be in a good agreement; its structure in the solid state was studied by the single crystal X-ray diffraction experiment for the crystal (PPh 4 )[ arachno -B 9 H 12 -4,8-Cl 2 ]·0.04HCl. The reaction of [ arachno -B 9 H 12 -4,8-Cl 2 ] − with liquid ammonia caused its quantitative conversion into the parent [ closo -B 9 H 9 ] 2− .
ISSN:1144-0546
1369-9261
DOI:10.1039/C7NJ04251E