Abstract

The coordinative properties towardslead(II) of two lateral macrobicyclic receptors that incorporate either a 1,10-diaza-[15]crown-5 (L7) or a 4,13-diaza-[18]crown-6 (L8) fragment are reported. Their protonation constants as well as the stability constants of their PbII complexes have been investigated by using potentiometric titrations.

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