Molecular Addition Compounds of Boron. V. Proton Chemical Shifts and the Stability of Adducts^1,2

Dimethylboric anhydride: a convenient preparation and full characterization

“…in agreement with work done by other workers (15)(16)(17). The single resonance observed for the dimethylboron chloride -dimethylboric anhydride system will be discussed in the next section.…”

“…The large upfield shift of the B-methyl resonance in the 1 : 1 Me,B20. NMe, sample, as compared to the B-methyl resonance in the free Me4B,0, is collsistellt with the formation of a strong complex (15). The large downfield shift of the N-methyl resonance in the 1 : 1 Me4B20.NMe3, as compared to the N-methyl resonance of free NMe, is also to be expected (16,17).…”

Functionalization and solubilization of BN nanotubes by interaction with Lewis bases

“…The changes in the 1 H and 13 C spectra of tributylamine found on interaction with BN are comparable to those reported in the literature for similar complexes. 17,18 We have also carried out solubilization experiments using the as-prepared BN nanotubes containing carbon nanotubes as impurity. Initially, a grey dispersion containing both carbon and BN nanotubes was obtained, but the carbon nanotubes settled to the bottom within a few hours leaving the BN nanotubes in the solution.…”

Structure and conformations of 2‐substituted and 3‐substituted alumolanes in polar solvents: a direct NMR observation

“…The relative stability of the complexes can be evaluated by considering the dependence of the 1 H, 13 C, and 27 Al NMR chemical shifts of metallacycle atoms on the solvent nature . This approach was used, e.g.…”