Four new acylhydrazones containing carboxyl,3a3d,were synthesized and their compositions and structures were characterized with elemental analysis, MS,IR and 1H NMR spectra.Their bacterio-（static） activities against staphylocus auteus,escherichia coil and bacillus subtilis were studied by Kirby-Bauer method.
The 2-(carboxymethoxyl)benzaldehyde benzoyl hydrazone(H 2L) was prepared by condensation of O-formylphenoxy acetic acid with benzoyl hydrazine in ethanol. Eight rare earth complexes with H 2L were synthesized in methanol and characterized by elemental analysis, IR, 1H NMR, EI-MS and molar conductivity measurement. The results indicated the molecular formula of H 2L is C 16H 24N 2O 4 and the composition of rare earth complexes is REL 3·nH 2O(where n=1～2, RE=La, Sm, Eu, Gd, Tb, Dy, Yb and Y). The H 2L as a tridentate ligand coordinates with rare earth ion and forms nine-coordination complexes. The K-B method tests showed the title complexes only have a low bacteriostatic activity against staphylocus auteus, escherichia coil and bacillus subtilis.
