Fluorophenylantimony carboxylates(II): synthetic and spectroscopic studies (UV, IR, 1H, 19F and 13C NMR) of pentafluorophenylantimony(V) di- and tetracarboxylates

Pentafluorophenylantimony(V) di- and tetracarboxylates of the molecular formula C6F5SbX2L2 (when X=L=OCOR (R=CH3, CH2Cl, CHCl2, CCl3, CF3, CH2OC6H3Cl2-2,4, CH2OC6H2Cl3-2,4,5) and when X=Cl; L=OCOCH3, OCOCHCl2) have been synthesized by the metathetical reaction of pentafluorophenylantimony(V) tetrachloride and (dibromide)dichloride with corresponding sodium salt of carboxylic acids in appropriate molar ratio using 15-crown-5 as phase transfer catalyst. The van’t Hoff factor ‘i’ and molar conductance data of the compounds revealed them to be monomeric and non-conducting in nature. Elemental analysis, UV, IR and NMR (1H, 19F and 13C) were used to characterize the derivatives. Compounds are tentatively assigned as a pentacoordinated square pyramidal structure in which carboxylate ligand behaving as a monodentate ligand.