Interaction of bimetallic alkoxides of Pr and Nd with Al, viz. M[AI(OC3H7i)413, (M=Pr-III/Nd-III), used in Meerwein-Ponndorf-Verley catalytic reduction of cyclohexanone and acetophenone in isopropanol solvent, has been investigated by following 4f-4f absorption spectra. The oscillator strengths (P) and the Judd-Ofelt intensity (T-lambda, lambda = 2, 4, 6) parameters corresponding to each of the 4f-4f bands of Pr-III and Nd-III at different times, have been calculated. Rate of intermediate complexation, of M[Al(OC3H7i)(4)](3) with ketone and isopropanol determined by measuring absorbance as well P were found to be comparable.