Syntheses, structures and characterizations of two organoimido derivatives of POMs containing sulfide groups

Abstract

Two remote methylthio group functionalized organoimido derivatives of hexamolybdate, (Bu4N)2[Mo6O18(NC6H4-SCH3-p)] (1) and (Bu4N)2[Mo6O18(NC6H4-SCH3-m)] (2), were synthesized through the refluxing reaction of octamolybdates, the hydrochloride salts of corresponding organic amines in anhydrous acetonitrile with dicyclohexylcarbodiimide (DCC) as dehydration agent. They are characterized by single crystal X-ray diffraction, FT-IR spectra, UV–Vis spectra, elemental analysis, 1H NMR and cyclic voltammetry. X-ray structural study reveals that anion clusters of both compounds possess some typical structural features of mono-substituted hexamolybdate, and their anion clusters are connected into two dimensional network via intermolecular multiple C–H⋯O hydrogen bonds.