Harish K. Sharma

Synthesis of new bimetallic [Al(III), Mg(II)]-μ-oxoisopropoxide and its β-diketone derivatives

A new bimetallic-μ-oxoisopropoxide [MgO2Al2(OPri)4] has been synthesized by thermal condensation of magnesium acetate (1 mol) and aluminium isopropoxide (2 mol) in refluxing decalin. The isopropoxy substitution reaction of this bimetallic [Al(III), Mg(II)]-μ-oxoisopropoxide with various β-diketones in molar ratios 1 : 1, 1 : 2 and 1 : 3 yielded compounds of the type [MgO2Al2(OPri)3(L)], [MgO2Al2(OPri)2(L)2] and [MgO2Al2(OPri)(L)3], respectively; where HL = HAcAc (acetyl acetone), HBzAc (benzoyl acetone) and HThTFA(2-thenoyl trifluoroacetone). The μ-oxo compound and its derivatives were characterized on the basis of elemental analysis, IR, 1H NMR 27Al NMR and molecular weight measurements.

Synthesis of phenylmagnesium carboxylates

Abstract The first phenylmagnesium carboxylates, C6H5MgOOCR·THF, have been made by reaction of phenylmagnesium bromide with the sodium salt of carboxylic acids [RCOONa {where R = CH3, ClCH2, Cl2CH, Cl3C, CH3CH2, (CH3)2CH, C6H5CH2 and CH3(CH2)3CH2}]. All these derivatives are white or pale yellow solids, soluble in polar solvents. The carboxylates have been characterized by elemental analysis, conductance measurements, and spectral studies (1H NMR and IR). The IR data suggest that carboxylate group acts as a bridging bidentate ligand.

Some new organotin(IV), aluminium(III)-μ-oxoisopropoxides and their benzoylacetone derivatives

The first organotin(IV), aluminium(III)-μ-oxoisoprovides of the type [R3SnOA](OiPr)2] (R = Me or Ph) have been made by heating of trimethyl- or triphenyl-tin acetate with aluminium isopropoxide. The reactions of these μ-oxoisopropoxides with benzoylacetone in 1:1 and 1:2 molar ratios yielded the compounds of the type [R3SnOAl(OiPr)(bzac)] and [R3SnOAl(bzac)2] (where R = Me or Ph and bzac = deprotonated benzoylacetone), respectively.