Pr(III), Nd(III), Eu(III), Er(III) and Yb(III) Complexes of Some 1,7-Diaryl-1,6-heptadiene-3,5- diones

Abstract

Pr(III), Nd(III), Eu(III), Er(III) and Yb(III) complexes of four 1,7-diarylheptanoids (HL) derived from acetylacetone and aromatic aldehydes (2-hydroxynaphthaldehyde, 4-methoxybenzaldehyde, 4-hydroxybenzaldehyde and 4-hydroxy-3- methoxybenzaldehyde) have been synthesized. Analytical and spectral data strongly support [ML2 (NO3 )(H2O)2 ] stoichiometry for the metal complexes. In all the metal complexes the 1,7-diarylheptanoids behave as monobasic bidentate in which the intra-molecularly hydrogen bonded enol proton is replaced by the metal cation. IR spectral data clearly revealed the bidentate coordination of nitrate ion in all these mixed ligand complexes.