Abstract
Di- and tetraprotonation of oligoamines 1–3 processing bicyclo[3.1.0]hexyl linking blocks were investigated by 13C NMR spectroscopy and the location of the protons in the resulting salts was determined via 1J CH coupling constants. The NMR spectroscopic prediction was confirmed by X-ray structural analysis in the case of the diammonium salt 2 · 2 TFSA hexahydrate (TFSA, trifluoromethanesulfonic acid); intramolecular hydrogen bonding was established in the solid state.
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