ELUCIDATION OF 11BORON NUCLEAR MAGNETIC RESONANCE SPECTRA BY HETERONUCLEAR SPIN DECOUPLING

摘要

These studies indicate that heteronuclear spin decoupling does aid the evaluation of boron spectra in that the information obtained is compatible with the information obtained from the 64.2 Mc/sec. spectra.nThis suggests that the spectra should have one doublet on one side of the resonance of the four equivalent boron nuclei and two doublets on the other side. In both cases, the doublet is at higher field than the resonance of the four equivalent boron nuclei, and the pair of doublets is at lower field. This seems to suggest that carbon could be imparting a dinmagnetic shift to its neighboring boron nuclei. A paramagnetic shift would be expected if only relative electronegativities were considered.