Siebold, Matthias;
Kelling, Alexandra;
Schilde, Uwe;
Strauch, Peter
Heterobimetallische 3d-4f-Komplexe mit Bis(1,2-dithiooxalato)nickelat(II) als planarem Brückenbaustein / Heterobimetallic 3d-4f-Complexes with Bis(1,2-dithiooxalato)nickelate(II) as Planar Bridging Block
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Media type:
E-Article
Title:
Heterobimetallische 3d-4f-Komplexe mit Bis(1,2-dithiooxalato)nickelat(II) als planarem Brückenbaustein / Heterobimetallic 3d-4f-Complexes with Bis(1,2-dithiooxalato)nickelate(II) as Planar Bridging Block
Contributor:
Siebold, Matthias;
Kelling, Alexandra;
Schilde, Uwe;
Strauch, Peter
Description:
<jats:p>Planar bis(1,2-dithiooxalato)nickelates(II) react in aqueous solutions of lanthanide ions to form pentanuclear, heterobimetallic complexes of the general composition [{Ln(H<jats:sub>2</jats:sub>O)<jats:sub>n</jats:sub>}<jats:sub>2</jats:sub>- {Ni(dto)<jats:sub>2</jats:sub>}<jats:sub>3</jats:sub>]・xH<jats:sub>2</jats:sub>O (Ln = Y<jats:sup>3+</jats:sup>, La<jats:sup>3+</jats:sup>, Ce<jats:sup>3+</jats:sup>, Pr<jats:sup>3+</jats:sup>, Nd<jats:sup>3+</jats:sup>, Sm<jats:sup>3+</jats:sup>, Eu<jats:sup>3+</jats:sup>, Gd<jats:sup>3+</jats:sup>, Tb<jats:sup>3+</jats:sup>, Dy<jats:sup>3+</jats:sup>, Ho<jats:sup>3+</jats:sup>, Er<jats:sup>3+</jats:sup>, Tm<jats:sup>3+</jats:sup>, Yb<jats:sup>3+</jats:sup>, Lu<jats:sup>3+</jats:sup>; n = 4 or 5; x = 9 - 12). With [{Nd(H<jats:sub>2</jats:sub>O)<jats:sub>5</jats:sub>}<jats:sub>2</jats:sub>{Ni(S<jats:sub>2</jats:sub>C<jats:sub>2</jats:sub>O<jats:sub>2</jats:sub>)<jats:sub>2</jats:sub>}<jats:sub>3</jats:sub>]・xH<jats:sub>2</jats:sub>O (x = 10 - 12) (1) and [{Er(H<jats:sub>2</jats:sub>O)<jats:sub>4</jats:sub>}<jats:sub>2</jats:sub>{Ni(S<jats:sub>2</jats:sub>C<jats:sub>2</jats:sub>O<jats:sub>2</jats:sub>)<jats:sub>2</jats:sub>}<jats:sub>3</jats:sub>]・xH<jats:sub>2</jats:sub>O (x = 9 - 10) (2) we were able to isolate two complexes of this series as single crystals, which were characterized by X-ray structure analysis. Depending on the individual ionic radii of the lanthanide ions, the compounds crystallize in two different crystal systems with the following unit cell parameters: 1, monoclinic in P2<jats:sub>1</jats:sub>/c with a = 11.3987(13), b = 11.4878(8), c = 20.823(2) Å , β = 98.907(9)° and Z = 2; 2, triclinic in P1̅ with a = 10.5091(6), b = 11.0604(6), c = 11.2823(6) Å , α = 107.899(4)°, β = 91.436(4)°, γ = 112.918(4)° and Z = 1. The channels and cavities appearing in the packing of the molecules are occupied by uncoordinated water molecules. High magnetic moments up to 14.65 BM./f.u. have been observed at room temperature due to the combined moments of the individual lanthanide ions.</jats:p>