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Download filePlanar, Twisted, and Trans-Bent: Conformational Flexibility of Neutral Diborenes
journal contribution
posted on 19.03.2008, 00:00 by Yuzhong Wang, Brandon Quillian, Pingrong Wei, Yaoming Xie, Chaitanya S. Wannere, R. Bruce King, Henry F. Schaefer, Paul v. R. Schleyer, Gregory H. RobinsonThe potassium graphite reduction of R‘BBr3 (R‘ = :C{N(2,4,6-Me3C6H2)CH}2) in Et2O led to the isolation of 3 (R‘(H)BB(H)R‘) and 4 (R‘(H)2B−B(H)2R‘), with BB double and B−B single bonds, respectively. These compounds were characterized by single-crystal X-ray diffraction, 1H and 11B NMR, and elemental analyses. Neutral diborene 3 exhibits polymorphic planar (3a), twisted (3b), and trans-bent (3c) geometries in the solid state.