ESI-MS Study of Ionization Pathways and Cation-Receptor Properties of the Iron(II) Mono- and Bis-Clathrochelates

Abstract

Ionization pathways of iron(II) di-and hexachloromonoclathrochelates, bis-clathrochelates and their oximehydrazonate, dimethyl-and diamine-containing macrobicyclic analogs, and the cation-receptor properties of such cage compounds towards alkali metal cations (as individual ions or their mixtures) as well as the competitive complexation in the presence of 18-crown-6 were studied by ESI-MS method. Ionization of iron(II) mono-and bis-clathrochelates under the conditions of ESI-MS experiments was found to proceed via different pathways. The macrobicyclic iron(II