Structures of high coordination complexes

Three Novel Rare-earth Complexes with Nitronyl Nitroxide Radical [RE(hfac)3 (NITPhOCH3)2] [RE = GdIII, YIII and ErIII]: Syntheses, Crystal Structures and Magnetic Properties

“…The bond distances between the Gd III ion and the oxygen atoms of the hfac ligands are in the range 2.346(5)-2.430(5) Å , while the averaged Gd-O bond distance from the two nitroxides is 2.348(5) Å . All the Gd-O distances are comparable with those observed both in other Gd(hfac) 3 NITR complexes (R=Ph,Et,Py) [12] and in other reported tris(b-diketonate) eight-coordinated lanthanide complexes [13]. (6) and 1.306 (7) Å ; for Y II complex, 1.272(8) and 1.287(9) vs. 1.310 (7) and 1.321 (7) Å ; for Er III complex, 1.271 (5) Table 2.…”

Structural characteristic and luminescence properties of first known example of a pair of europium(III) complexes of phosphoroazo-derivative of β-diketone with inner and both inner and outer sphere 2,2′-bipyridine

“…Eu (1) 0.064 0.081 Eu (2) 0.097 0.046 Δ parameter is defined as d i 2 /8, i = 1-8, where d i is the distance between ith atom and the relevant vertex of the ideal least-squares fitted polyhedron [30]. chromophore and narrow much less intense lines attributed to 4f-4f transitions.…”

Trinuclear [CoIII2–LnIII] (Ln=Tb, Dy) Single‐Ion Magnets with Mixed 6‐Chloro‐2‐Hydroxypyridine and Schiff Base Ligands

“…Analysis of the coordination geometry by the creased angles of two approximate square planes may be used to evaluate the eight-coordinate polyhedron conformations: the corresponding angles are 29.5 and 29.58 for a dodecahedron, 0 and 08 for a square antiprism, and 21.8 and 08 for a bicapped trigonalprism. [13] For the Dy1 atom of 1, the two approximate square planes defined by O3 À O4 À O5 À O6 and O3 i À O4 i À O5 i À O6 i (symmetry code i = Àx, y, 0.5Àz) are creased about the respective O3 À O5 and O4…”