Two new bromo-functionalized organoimido derivatives of hexamolybdate: Synthesis, crystal structure, spectroscopic and electrochemical studies

摘要

Two organic-inorganic hybrid compounds, (Bu4N)(2)[Mo6O18(NAr)] (Ar = 2-CH3-4-BrC6H3 (1) or 2,6-CH3-4-BrC6H2 (2)) have been synthesized via the DCC dehydrating protocol of the reaction of [alpha-Mo8O26](4-) with 2-methyl-4-bromoaniline hydrochloride or 2,6-dimethyl-4-bromoaniline hydrochloride in anhydrous Acetonitrile, which have been characterized by UV-Vis spectra, H-1 NMR, IR, cyclic voltarnmetry and X-ray single-crystal diffraction study. Both compounds crystallize in the monoclinic space group P (1) over bar, which are featured in a terminal phenylimido group linked to a Mo atom of a hexamolybdate cluster by a Mo-N triple bond. Interestingly, there are two conformational isomers of the cluster anions of 1 and 2 in the crystals. By cyclic voltammetry study, their special redox properties were also found in the end. (C) 2007 Elsevier B.V. All rights reserved.