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La(III) complexes of some 1,7-diaryl-1,6-heptadiene-3,5-diones

Krishnannair Krishnankutty, Parakkulangara Thrithody Malini, Muhammed Basheer Ummathur

La(III) complexeswith the formula [LaL2Cl(H2O)2] of five 1,7-diarylheptanoids (HL) derived from acetylacetone and aromatic aldehydes (2- hydroxynaphthaldehyde, 4-methoxybenzaldehyde, 4-hydroxybenzaldehyde, 4-dimethylaminobenzaldehyde and 4-hydroxy-3-methoxybenzaldehyde) have been synthesized. Analytical, IR, 1H NMR and mass spectral data indicate the monobasic bidentate coordination in which the intramolecularly hydrogen bonded enol proton is replaced by La(III) ion.