Abstract
Two types of proton‐detected ^1^H^15^N correlation experiments were compared with respect to the observation of ^15^N NMR resonances broadened by scalar relaxation of the second kind. Both single‐ and multiple‐quantum experiments gave equal ^15^N line widths in F~1~, and in all cases the inverse experiments provided a dramatic increase in sensitivity and spectrometer time‐saving compared with the direct observation of ^15^N resonances. Various aminoboranes [B(NHMe)~3~; B(NHNMe~2~)~3~; 2,3‐dihydro‐2‐methyl‐2‐boraperimidine; organo‐substituted 2,5‐dihydro‐1,2,5‐azasilaboroles; organo‐substituted 7,8‐benzo‐1‐oxa‐6‐aza‐2‐sila‐5‐bora‐3‐cyclooctene], organo‐substituted 2,5‐dihydro‐1,2,5‐azasilaboratolates, an amine–borane adduct (organo‐substituted 7,8‐benzo‐6‐oxa‐1‐aza‐2‐sila‐5‐borabicyclo[3.3.0]oct‐3‐ene), and (ligand)transition metal π‐complexes of organo‐substituted 2,5‐dihydro‐1,2,5‐azasilaboroles were studied by two‐dimensional inverse ^1^H{^15^N} NMR experiments. The straightforward application to the analysis of several mixtures suggests that this technique is promising for the investigation of oligomerization and polymerization of boron—nitrogen compounds.