A drum-shaped cage built up from six carbon and six boron atoms is proposed for the structure of 2 based on the comparison of experimental and calculated NMR chemical shifts. The novel arachno carborane 2 was obtained upon treatment of bis(diethylboryl)ethyne (1) with an excess of tetraethyldiborane(6) [Eq. (a)].
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| http://dx.doi.org/10.1002/(SICI)1521-3773(19980518)37:9<1245::AID-ANIE1245>3.0.CO;2-J | DOI Listing |
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