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| Titel: |
Synthesis, Structure and Spectroscopy of the Complexes Tetrakis μ-Trichloroacetato)Bis[Trichloroacetato-Ethanol-(1,10-Phenanthroline-N,N')LN(III)] (LN = Pr, Nd and Er) |
| Auteur: |
Dong, Nan Wang, Hong Barton, R. J. Robertson, B. E. |
| Verschenen in: |
Journal of coordination chemistry |
| Paginering: | Jaargang 22 (1990) nr. 3 pagina's 191-204 |
| Jaar: |
1990-12-01 |
| Inhoud: |
Tetrakis(μ-trichloroacetato)bis[trichloroacetatoethanol-(1,10-phenanthroline-N,N)Ln(III)] (Ln = Pr, Nd and Er) complexes have been synthesized and their crystal structures have been determined by X-ray diffraction at reduced temperatures. The three structures are isomorphous: monoclinic, P21/c. For the praseodymium complex, a = 12.418(6), b = 18.444(5), c = 17.742(9) Å, β0 = 131.71(3)°, R = 0.051, and Rw = 0.057. For the neodymium complex a = 12.396(6), b = 18.498(4), c = 17.339(8) Å, β = 131.50(2)°, R = 0.054, and Rw = 0.060. For the erbium complex a = 12.186(3), b = 18.462(4), c = 17.478(4) Å, β = 131.12(1)°, R = 0.041, and Rw = 0.045. Each lanthanide ion is coordinated by four bridging bidentate trichloroacetate ligands, one monodentate trichloroacetate ligand, one ethanol ligand and one phen-anthroline ligand, yielding a distorted square antiprismatic configuration. The two lanthanide ions are connected by the four bridging bidentate trichloroacetate ligands to form a dimer. The NMR spectra of the complexes confirm the coordination of ethanol ligands to the lanthanide ions. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
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