The review systematizes the data of 1H NMR spectra of a large series of structurally related open-chain oligopyrrole compounds: dipyrromethanes, dipyrromethenes, tri-, tetra- and hexapyrrole analogues with different nature of peripheral substituents in the pyrrole cores and meso-spacer, and their chelates with B(III) and a number of d-metals. Examples of typical 1H NMR spectra of structurally related compounds are given. It is shown that in the 1H NMR spectra of open-chain oligopyrrole compounds the proton signals of specific groups of atoms retain high characteristicity. The ranges of positions of proton signals of individual groups, their intensity and multiplicity well confirm the structure of oligopyrrole compounds. Depending on the features of the ligand molecular structure, the proton signals of individual groups of atoms are located in the following ranges of parts per million: 0.56–5.12 (alkyl substituents); 3.34–7.06 (methylene -CH2-spacers); 5.11–7.90 (α- and β-positions of the pyrrole rings); 6.08–7.90 (methine = CH- spacers); 6.39–8.83 and 9.45–9.82 (aromatic and formyl substituents, respectively); 6.72–15.18 (NH groups). Characteristic shifts of proton signals in the 1H NMR spectra of oligopyrroles caused by changes in the peripheral substitution nature, protonation and coordination of dipyrromethene ligands by B(III), Zn(II), Cd(II) and Hg(II) were revealed.
