Figure 5.

The low-field part of ¹H-NMR spectrum of the sample containing acids 1 and 3 (1.2:1) in CDF₃/CDF₂Cl at 100 K. The experimental spectrum is deconvoluted into the sub-spectra arising from self-associated of 1 or 3, heterodimer 1-3, two heterotrimers, 1-3-1 and 3-1-3, and a tetramer, consisting of two molecules of 1 and two molecules of 3 in a cyclic 1-3-3-1 configuration. For visual clarification the signals in the experimental spectrum and the computed sub-spectra are color coded. Trimers and tetramers are marked by asterisks and squares, respectively.