Lanthanide(III) and Yttrium(III) Complexes ofBenzimidazole-2-Acetic Acid: Synthesis, Characterisation and Effect of La(III) Complex on Germination of Wheat

摘要

The synthesis and characterisation of lanthanide(III) andyttrium(III) nitrate complexes of benzimidazole-2-acetic acid(HBIA) are reported. The complexes have been characterised byelemental analysis, molar conductance, magnetic studies, IR,1H NMR, UV-visible, EPR, and TG/DTA studies. They havethe stoichiometry[Ln3(BIA)2(NO3)7(H2O)4]?3H2Owhere Ln=La(III), Pr(III), Nd(II), Sm(III), Eu(III), Gd(III),Tb(III), Dy(III), and Y(III). The effect of La(III) complex ongermination, coleoptile, and root length of two local varieties ofwheat DWR-195 and GW-349 for different treatment periods has beeninvestigated. The complex was found to exhibit enhanced activity,compared to HBIA or metal salt alone at lower treatment periods.