Synthesis and crystal structures of lanthanide complexes with foliage growth regulator: phenoxyalkanoic acid

Reactions or Lu(ClO4)(3)center dot 6H(2)O (Ln=La(III), Eu(III), Nd(III)), 1,10-phenanthroline (phen) and phenoxyacetic acid (PA) or 2,4-dichlorophenoxyacetic acid (2,4-D) yield [La(PA)2 (phen)(2)](2)(ClO4)(2) (1), [Eu(2,4-D)(2)(phen)(2)](2)(ClO4)(2) (2) and [Nd(2,4-D)(3)(C2H5OH)](n) (3). Compounds 1-3 are characterized by elemental analyses, IR, UV-Vis, ESI-MS spectra and TGA. 1 is also characterized by H-1 and C-13 NMR. Single crystal X-ray diffraction analyses reveal that I and 2 tire binuclear, and 3 has a one-dimensional polymeric structure. The La(Ill), Eu(III) and Nd(III) are nine-coordinate with a distorted tricapped trigonal-prism geometry.