Molecular Structure of Tri(2-thienyl)borane

Bernd Wrackmeyer, Wolfgang Milius, Elias Molla
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
more » ... of suggestive δ11 B. δ13C data and structural parameters.
doi:10.1515/znb-1996-1219 fatcat:oumw2vdofjhihchb5auryzjrqi