Effect of Reaction Time on Lanthanide Borate Perrhenate Complexes.

Six new trivalent lanthanide borate perrhenate structures─the isostructural series Ln[BO(OH)(HO)(ReO)] (Ln = Ce-Nd, Sm, Eu; ) and La[BO(OH)(HO)(ReO)] ()─have been prepared and structurally characterized. Single-crystal X-ray diffraction analysis reveals that both structures crystallize in the 2/ space group, contain 10-coordinated trivalent lanthanides in a capped triangular cupola geometry, are 3D borate framework materials, and contain either terminal () or bridging () perrhenate moieties. The presence or lack of a bridging perrhenate, along with the identity of the basal ligands, dictates how the layers are tethered together, ultimately leading to the different structures. Furthermore, the formation of is sensitive to the reaction time employed. Herein, the synthesis, structural descriptions, and spectroscopy of these trivalent lanthanide perrhenate borate complexes are presented.