The reactions of CuCl and
tBuTeSiMe
3 in the presence of phosphine ligands result in the formation of four new Cu/Te cluster complexes, [Cu
18Te
6(Te
tBu)
6(PPh
2Et)
7], [Cu
19Te
6(Te
tBu)
7(PEt
3)
8], [Cu
27Te
15(P
iPr
2Me)
12] and [Cu
58Te
32(P
tBu
2
nBu)
14], which have been structurally characterized by single crystal structural analysis. The former two clusters show a layer-type tellurium frameworks in which the copper atoms are asymmetrically spread. The latter two clusters possess a tellurium framework in a body-centered Te
14-Frank-Kasper polyhedron or a Te
28 polyhedron with four interstitial tellurium atoms and belong to mixed-valence Cu/Te compounds.
copper telluride clusters - copper telluro-tellurolato clusters - crystal structure - influence of phosphine ligands - Frank-Kasper polyhedron