Synthesis and Characterization of Bis(1,10-phenanthroline) tri(trans-2,3-dimethylacrylato) Lanthanide(Ⅲ) Dinuclear Complexes

Abstract

Abstract: Novel dinuclear lanthanide complexes, [REL₃(phen)]₂(RE=La, Ce, Pr, Nd, Sm, Eu; L=trans-2,3-dimethylacrylate, phen=phenanthroline), have been synthesized and characterized by IR, NMR, UVspectroscopy and elemental analysis. The single crystal of [LaL₃phen]₂ has been determined by X-ray crystallography, which crystallizes in the monoclinic, space group P₂ 1/n with Z=2, cell dimensions a=1.2962(4) nm, b=1.3283(4) nm, c=1.5485(5) nm, β=95.45(2)°. The structure was refined to R=0.033 for observed 3112 reflections and consists of centrosymmetric dinuclear molecule. Lanthanum atoms are bridged by two bidenate and two terdentate carboxylato groups with La…La separation of 0.4094 nm. Each Lanthanum atom is nine coordinate and exhibits a distorted tricapped trigonal prism. The La—Oand La—Nbond distances are in the range of 0.2460 —0.2756 and 0.2718—0.2760 nm, respectively.

Key words: Rare earth metal, trans-2,3-Dimethylacrylic acid, 1,10-Phenanthroline, Crystal structure

CLC Number:

O614

TrendMD:

LU Wei-Min, WU Bin, WANG Li-Na . Synthesis and Characterization of Bis(1,10-phenanthroline) tri(trans-2,3-dimethylacrylato) Lanthanide(Ⅲ) Dinuclear Complexes[J]. Chem. J. Chinese Universities, 2001, 22(4): 535.

References

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