Figure 7.

The low-field part of the ¹H NMR spectrum of the sample containing acids 1 and 4 (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 4, heterodimer 1-4, two heterotrimers, 1-4-1 and 4-1-4, and a tetramer, consisting of two molecules of 1 and two molecules of 4 in an alternating fashion 1-4-1-4. For visual clarification the signals in the experimental spectrum and the computed sub-spectra are color coded. Trimers, dimers, and tetramers are marked by asterisks, diamonds, and squares, respectively.