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Syntheses and characterization of o-carboranes containing fused exo-polyhedral di- and triboraheterocycles

Reaction of dilithio-o-carborane Li2C2B10H10 (generated in situ from o-carborane 1 and butyllithium) with the 1, 2-diborylbenzene derivative 1, 2-C6H4(iPr2NBCl)2 yielded the o-carborane compound 3 having the fused exo-polyhedral C2B2C2 heterocycle. The analogous reactions with 1, 1-bis(dimethylamino...

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Bibliographic Details
Main Authors: Nie, Yong (Author) , Miao, Jinling (Author) , Wadepohl, Hubert (Author) , Pritzkow, Hans (Author) , Oeser, Thomas (Author) , Siebert, Walter (Author)
Format: Article (Journal)
Language:English
Published: May 23, 2013
In: Zeitschrift für anorganische und allgemeine Chemie
Year: 2013, Volume: 639, Issue: 7, Pages: 1188-1193
ISSN:1521-3749
DOI:10.1002/zaac.201300120
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1002/zaac.201300120
Verlag, lizenzpflichtig, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/zaac.201300120
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Author Notes:Yong Nie, Jinling Miao, Hubert Wadepohl, Hans Pritzkow, Thomas Oeser, and Walter Siebert
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Summary:Reaction of dilithio-o-carborane Li2C2B10H10 (generated in situ from o-carborane 1 and butyllithium) with the 1, 2-diborylbenzene derivative 1, 2-C6H4(iPr2NBCl)2 yielded the o-carborane compound 3 having the fused exo-polyhedral C2B2C2 heterocycle. The analogous reactions with 1, 1-bis(dimethylaminochloroboryl)ethane and with 1, 3-dichloro-1, 2,3-tris(dimethylamino)triborane(5) afforded the o-carborane compounds 5 and 7 containing the fused exo-polyhedral five-membered C2B2C and C2B3 rings, respectively. Attempts to use 1, 2-dichloro-1, 2-bis(dimethylamino)diborane(4) for the synthesis of the o-carborane compound 10 with a fused exo-polyhedral C2B2 ring instead led to the diborane(4)yl-o-carborane species 9c and 9d (the latter in trace amount), which contain a diborane(4)yl moiety bonded to the o-carborane. The molecular compositions of the new o-carborane derivatives follow from NMR spectroscopic and mass spectrometric data as well as from X-ray diffraction analyses of 3, 7 and 9c. The structures exhibit weak intramolecular C-H···H-B hydrogen-hydrogen interactions.
Item Description:Gesehen am 25.11.2021
Physical Description:Online Resource
ISSN:1521-3749
DOI:10.1002/zaac.201300120

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