A uranyl ion complex of N-methyl-p-tert-butyldihomoammoniocalix[4]arene with diaquadipyridinelithium as counter-ion
Abstract
The title complex, diaquadipyridinelithium (N-methyl-p-tert-butyldihomoammoniocalix[4]arene-κ4O)dioxouranium(VI) tripyridine solvate monohydrate, [Li(C5H5N)2(H2O)2][UO2(C46H58NO4)]·3C5H5N·H2O, contains an `internal' tetraphenoxide-coordinated uranyl complex of the macrocycle, in which the protonated N atom is involved in an intramolecular hydrogen bond with the uranyl oxo group located in the cavity. The Li+ ion is in a tetrahedral environment and its two water ligands are involved in hydrogen bonds with two phenoxide O atoms, two pyridine molecules and one water molecule. This arrangement is compared with those obtained previously for other homoazacalixarenes and also for homooxacalixarenes in the presence of alkali metal hydroxides.
