Synthetic, structural and spectroscopic studies on mono- and bi-arylimido functionalized hexamolybdates bearing the strong electron-withdrawing nitro group, (Bu 4N) 2[Mo 6O 18( [tbnd]NAr)] and (Bu 4N) 2[Mo 6O 17( [tbnd]NAr) 2] (Ar [dbnd]o-NO 2–C 6H 4)

Abstract

Two novel mono- and bi-functionalized organoimido derivatives of hexamolybdates bearing the strong electron-withdrawing nitro group, (Bu 4N) 2[Mo 6O 17( NAr) 2] ( 1) and (Bu 4N) 2[Mo 6O 18( NAr)] ( 2) (Ar o-NO 2–C 6H 4) have been synthesized for the first time via the reaction of hexamolybdate ions and 2 equivalent of aromatic amines with an excessive dehydrating agent N, N′-dicyclohexylcarbodiimide (DCC). By controlling the amount of DCC, such two derivatives can be selectively prepared in reasonable yields, which have been characterized with UV/vis, IR, 1H NMR, ESI-mass spectrometry and single-crystal X-ray diffraction techniques. The influences of [NAr] ligands and [NAr] incorporation number on properties and supermolecular assembly of such two derivatives have been systematically investigated.