A series of heterobimetallic complexes [RE2Ca(OQ)(8)]center dot nHOQ(RE = Sm, Gd, Tb, Ho, Tm, Yb, Lu, Y, Sc) and the isostructural [Gd2Mg(OQ)(8)] were synthesised and structurally characterised. They were mainly obtained after direct reactions of the elemental rare earth metals with calcium metal in the presence of 8-hydroxyquinoline (HOQ) and a 1, 3, 5-tri-tert-butyl-benzene (tBuB) flux, and some complexes were synthesised by pseudo solid-state rearrangement reactions between powdered RE(OQ)(3) and AE(OQ)(2) (AE = Mg, Ca) in a 1, 2, 4, 5-tetramethylbenzene (TMB) flux, at elevated temperatures. The linear trinuclear [RE2Ca(OQ)(8)] moieties show a six-coordinate central calcium atom flanked by two eight-coordinate rare earth atoms surrounded by six chelating-bridging OQ and two terminal chelating OQ ligands. The structurally novel [Sc2Ca(OQ)(8)] has a bent Sc-Ca-Sc backbone and exhibits an eight-coordinate central calcium and two seven-coordinate scandium ions.
|Pages (from-to)||2001 - 2007|
|Number of pages||7|
|Journal||Zeitschrift fuer Anorganische und Allgemeine Chemie|
|Publication status||Published - 2012|