797-799A series of β-diketonate and β-diketoester derivatives of triorganoantimony (V)-dihalides, mixed halides and tetra-organostibonium (V) halide of the type R3Sb(X)L, R3Sb(Y)L and R3Sb(Y)L, where R=C6H5 or p CH3C6H4; L = acac, dpm, eaa and em; X=CI, Br and Y= I have been synthesised by the metathetical reaction of organoantimony (V) halide(s) with the sodium salt of the ligand in refluxing benzene. The replacement of second halogen atom from R3Sb(X)L, could be affected using only monodentate ligand to give R3Sb(L’)L (where L'=OOCH3) or OCH3). The newly synthesised derivatives (R3Sb(X)L, R3Sb(Y)L and R4SbL) are monomeric in benzene and behave as nonelectrolytes in acetonitrile. Solid state IR and PMR spectral data suggest an octahedral around antimony
