A Topological Link between Lanthanide and Alkali-Metal Clusters: Face-Sharing Gadolinium Octahedra Centered by Endohedral Iridium Atoms in {Ir3Gd11}Br-15

作者：Bruehmann Matthias; Meyer Gerd^*

来源：European Journal of Inorganic Chemistry, 2010, (18): 2609-2611.

DOI：10.1002/ejic.201000254

• Bromides
• Cluster compounds
• Gadolinium
• Iridium
• Rare earths

The oligomeric cluster complex {Ir3Gd11} Br-15 was first obtained from a reaction of Gd, GdBr3 and Ir in a 3:4:1 molar ratio at 1123 K. The crystals belong to the hexagonal space group P6(3)/m with lattice parameters a = 1276.79(14) pm and c = 1286.92(16) pm. The structure features isolated {Ir3Gd11} cluster trimers, which are built up by three face-sharing gadolinium octahedra each centered by an iridium atom. The endohedral iridium atoms form a triangle with Ir-Ir distances of 295.51(11) pm. Thus, the (Ir3Gd11} cluster is topologically equivalent to the suboxide {O3Cs11}. The {Ir3Gd11} clusters are encapsulated in a coordination sphere of 30 bromide ions, which act as bridging ligands according to the formulation {Ir3Gd11}Br12/2i-iBr9/2i-aBr9/2a-i. In {Ir3Gd11}Br-15 there are 45 electrons present for intracluster bonding,

• 出版日期2010-6