Two novel mono-organoimido functionalized polyoxometalate clusters: Convenient synthesis, crystal structure and bioactivity of [(n-C4H9)4N]2[Mo6O18(NAr)] (Ar = o-CF3C6H4, p-OCF3C6H4)

Abstract The hexamolybdate cluster has been functionalized with fluorine-containing aromatic amine by the DCC ( N , N ′-dicyclohexylcarbodiimide) dehydrating protocol and two novel mono-functionalized arylimido derivatives of hexamolybdates bearing the electron-withdrawing trifluoromethyl group and trifluoromethoxy group, (Bu 4 N) 2 [Mo 6 O 18 (≡NAr)] (Ar =  o -CF 3 C 6 H 4 ) 1 and (Bu 4 N) 2 [Mo 6 O 18 (≡NAr)] (Ar =  p -OCF 3 C 6 H 4 ) 2 have been synthesized by improved method. Complete assignments were achieved for the title compounds by elemental analysis, IR, 1 H NMR, UV/visible and single-crystal X-ray diffraction analyses. The preliminary herbicidal activity test indicated that they have some herbicidal activities.