Mono- and Hetero-Dinuclear Schiff Base Derivatives of Antimony (III): Synthesis, Characterization and Antibacterial Activity
Main Group Metal Chemistry
SbLLH (la-Id) have been prepared by the reaction of Sb(OPr')3 and LH 2 [R'C(NYOH)CHC(R)OH] in 1:2 molar ratio in refluxing benzene. The reactions of SbLLH with AlfOPr 1^ in equimolar ratio yield the heterodinuclear derivatives SbLLAl(OPr 1 ) 2 (2a-2d). All these derivatives (la-Id and 2a-2d) have been characterized by elemental analysis and molecular weight measurements and a plausible structure has been suggested, on the basis of spectral studies, i.e. IR, NMR ('Η, l3 C and 27 Al).
... 27 Al). EXPERIMENTAL All the experimental work was carried out under strictly anhydrous conditions. Solvents were dried by literature method l\2l. Isopropoxides of antimony /13/ and aluminium /14/ were prepared by the method reported earlier. Aluminium was determined as oxinate /12/ and antimony was determined volumetrically I Ml. Nitrogen was estimated by Kjeldhal's method IMI. Isopropoxy group in the complexes and isopropanol in the azeotrope were estimated by oxidimetric method /15/. The 'H (300 MHz), 13 C (300 MHZ and 27 A1 (23.79 MHz) NMR spectra were recorded on a JEOL FT Al 300 spectrometer. *H and 13 C NMR spectra were recorded using TMS as internal reference and 27 A1 NMR spectra were recorded using aqueous solution of aluminium nitrate as external reference. IR spectra were recorded as nujol mull using KBr cells in the range of 4000 -400 cm" 1 on FTIR spectrophotometer model 8400S Shimadzu. Since all the derivatives (la -Id and 2a -2d) have been synthesized by similar procedure, synthesis of