Syntheses and pyrolytic studies of salicylate derivatives of heterotrinucleic [AlIII-SnII-BIII]-μ-oxoisopropoxide

Abstract

New salicylate derivatives of heteronucleic-μ-oxoisopropoxide [SnO₂AlB(OPrⁱ)₄] have been synthesized by the thermal condensation of μ-oxoisopropoxide and methyl/ethyl/phenyl/phenyl ethyl salicylates in different molar ratios (1:1-1:2) yielding the compounds of the type [SnO₂AlB(OPrⁱ)_4-n(RSAL)_n] (where n is 1-2 and RSAL = salicylate anion), respectively. The complexes have been characterized by elemental, spectral (IR, ¹H, ¹³C, ²⁷Al, ¹¹⁹Sn and ¹¹B NMR), thermal and molecular weight measurement. The complexes are hydrolysed by hydrothermally assisted sol-gel technique and gave hydrolyzed product. Thermal studies of these products are made which favor the formation of multicomponent oxides. The studies reveal that salicylate derivatives are polymeric in nature and low susceptible to hydrolysis as compared to parent compound and may prove excellent precursors for the mixed metal oxides.

KEY WORDS: Heteronucleic-μ-oxoalkoxides, Aluminium, Tin, Boron, Salicylates, TG analysis

Bull. Chem. Soc. Ethiop. 2013, 27(3), 377-386.

DOI: http://dx.doi.org/10.4314/bcse.v27i3.6