Abstract
Two new Np(V) o-Cl-benzoates of composition [(NpO2)(phen)(C7H4ClO2)]3 (1) and [(NpO2)(bipy)(C7H4ClO2)]4·2H2O (2) with N-donor ligands phenantroline (phen) and bipyridine (bipy) have been synthesized and structurally characterized. In these complexes, NpO2+ cations are linked by cation-cation bonds, acting as monodentate ligands with respect to each other. As a result, a trimeric complex is formed in 1, and a tetrameric complex is formed in 2. The Np atoms in both compounds have a pentagonal-bipyramidal environment with “yl” oxygen atoms in apical positions. The equatorial planes of the bipyramids are formed by two nitrogen atoms of phen (1) or bipy (2), one oxygen atom of another NpO2+ cation, and two oxygen atoms from two C7H4ClO2– anions. Electronic absorption spectra of crystalline compounds were measured in the near IR-visible range.
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