Crystal structures and stereochemical properties of lanthanide(III) complexes with ethylenediamine-N,N,N′,N′-tetraacetate

Synthesis, Crystal Structure, and Vibrational Spectra of Five Novel Peroxidocerates(IV) and the Occurrence of a New Complex Unit in K8[Ce2(O2)3(NTA)2]2·20H2O

“…Structures containing alkali, [6][7][8] d-block elements or bismuth, [9][10][11][12] and lanthanides in nitrilotriacetatic and ethylenediamine-tetraacetatic complexes are also known and their structures were investigated by X-ray structure analysis. [6][7][8][9][10][11][12] Some lanthanide carbonates have been investigated structurally by X-ray diffraction analysis.…”

“…Structures containing alkali, [6][7][8] d-block elements or bismuth, [9][10][11][12] and lanthanides in nitrilotriacetatic and ethylenediamine-tetraacetatic complexes are also known and their structures were investigated by X-ray structure analysis. [6][7][8][9][10][11][12] Some lanthanide carbonates have been investigated structurally by X-ray diffraction analysis. [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27] The mentioned literature only deals with lanthanides in oxidation state of rather three than two in case of europium.…”

“…[46,47] In 1964 a preparation of cerium(IV) peroxy acetate was described. [48] Barnes et al reported the first single crystal structure analyses of Na 8 [49][50][51] Recently, the crystal structures of the heavier alkali metals with the general formula A 4 [Ce(O 2 )(CO 3 ) 3 ]·xH 2 O (A = Rb, Cs; x = 12 and 10) have been published. [52] In this contribution we report the synthesis of five novel peroxidocerates(IV) (I-V), which were characterized by single-crystal X-ray structure analysis and for compounds II-V Raman and infrared spectra were measured and discussed.…”

Effect of the formation of EDTA complexes on the diffusion of metal ions in water

“…d Templeton et al (1985). e Sakagami et al (1999). * RSD (%) was obtained from triplicate experiments.…”

“…Normally, EDTA is a hexadentate ligand, and the structure of the EDTA complex with metal ion having six coordination numbers may be structurally most compact, since all functional groups of EDTA can coordinate to the metal ion. In the case of metal ion with coordination numbers above 6 such as Ln 3+ , the structure of the EDTA complex may become larger, since a few water molecules coordinated to the metal ion in addition to EDTA (Hoard et al, 1965;Nassimbeni et al, 1979;Templeton et al, 1982Templeton et al, , 1985Nakamura et al, 1995;Sakagami et al, 1999). These speculations imply that the difference in coordination number has a large effect on the diffusion coefficients of M-EDTA (zÀ4)+ for metal ions, but the effect of hydration of the EDTA complex is minimal, which is different from free metal ions.…”