pHMetric studies of substituted dihydropyrimidin2(1H)one with La(III), Ce(III), Pr(III), Nd(III), Sm(III), Eu(III) metal ions at 0.1M ionic strength.

Yuvraj K.Meshram; Gaurav R.Nimbarte; Suresh B.Rewatkar

Volume : V, Issue : IX, September - 2016

pHMetric studies of substituted dihydropyrimidin2(1H)one with La(III), Ce(III), Pr(III), Nd(III), Sm(III), Eu(III) metal ions at 0.1M ionic strength.

Yuvraj K. Meshram, Gaurav R. Nimbarte, Suresh B. Rewatkar

Abstract :

The interaction of La(III), Ce(III), Pr(III), Nd(III), Sm(III), Eu(III) metal ions with 5–ethoxy carbonyl–4–(4– chloro phenyl)–6–methyl–3,4–dihydropyrimidine–2(1H)–0ne (ligand–1) and 5–ethoxy carbonyl–4–(4–fluro phenyl)– 6–methyl–3,4–dihydropyrimidine–2(1H)–0ne (ligand–2) have been investigatedby pH–metric technique at 0.1 M ionic strength at 29 � 0.1 ºC in 70 % THF–water mixture. The data obtained were used to estimate the values of proton–ligand stability constant (pK) and metal–ligand stability constant log K. It is observed that La(III), Ce(III), Pr(III), Nd(III), Sm(III), Eu(III) metal ions formed 1:1 and 1:2 complexes with all the ligands.