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Molecular Structure of Tri(2-thienyl)borane
1996
Zeitschrift für Naturforschung. B, A journal of chemical sciences
The molecular structure of tri(2-thienyl)borane (1) was determined [monoclinic, space group P21/ c; a = 12.216(2), b = 7.765(2), c = 12.605(2) Å, β = 93.13(2)°]; two of the three thienyl groups are disordered, as is also indicated by the solid-state 13C CP/MAS NMR spectrum of 1. The 13C NMR spectra of 1 were measured at variable tem perature in solution and the barrier to rotation about the B-C bonds was found to be <35 kJ/mol. Thus, CB(pp)π interactions must be regarded as rather weak, in
doi:10.1515/znb-1996-1219
fatcat:oumw2vdofjhihchb5auryzjrqi