American Chemical Society
ja800257j_si_013.pdf (69.61 kB)
Download file

Planar, Twisted, and Trans-Bent:  Conformational Flexibility of Neutral Diborenes

Download (69.61 kB)
journal contribution
posted on 2008-03-19, 00:00 authored by Yuzhong Wang, Brandon Quillian, Pingrong Wei, Yaoming Xie, Chaitanya S. Wannere, R. Bruce King, Henry F. Schaefer, Paul v. R. Schleyer, Gregory H. Robinson
The 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)BB(H)R‘) and 4 (R‘(H)2B−B(H)2R‘), with BB 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.