Monoribbed-Functionalized Macrobicyclic Iron(II) Complexes Decorated with Terminal Reactive and Vector Groups: Synthetic Strategy, Chemical Transformations and Structural CharacterizationстатьяИсследовательская статья
Информация о цитировании статьи получена из
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 6 июля 2022 г.
Аннотация:General and straightforward synthetic strategy towards the iron(II) clathrochelates with functionalizing substituents in their apical capping and one of the three chelate ribbed fragments was developed. Their hexachloroclathrochelate precursors were prepared by the direct template condensation of dichloroglyoxime with a suitable boronic acid on the Fe2+ ion as a matrix and underwent a step-wise nucleophilic substitution with S2-, N2- or O2-bis-nucleophiles, forming the alicyclic or aromatic N2-, S2- or O2-six-membered fragments. Depending on the reaction conditions and precursor-to-dinucleophile molar ratios, iron(II) clathrochelates with one (S, O and N), two (S, O and N) or three (S and O) X2-six-membered ribbed substituent(s) were obtained. Their reactivity substantially de-creases in a row: Cl6-Cage > Cl4X2-Cage (where X = S, O or, especially, N) > Cl2X4-Cage (where X = S or O). The reactive mon-oribbed-functionalized clathrochelates underwent further chemical transformations giving the target macrobicyclic complexes with terminal vector groups. As follows from the single crystal XRD data, their FeN6-coordination polyhedra possess the geometry inter-mediate between a trigonal prism and a trigonal antiprism (fi = 21.3°—25.20°). Fe—N distances vary from 1.887(6) to 1.933(8) Å. Their 3D-molecules, the hydrophobic–hydrophilic balance in which can be tuned using a ribbed functionalization, form in the crystals the intermolecular specific halogen bonds and/or hydrophobic interactions.