
TY  - JOUR
A1  - Dance, IG 
T1  - The Hepta(&#956;-benzenethiolato)pentametallate(I) dianions of copper and silver: Formation and crystal structures
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1978
VL  - 31
IS  - 10
SP  - 2195
EP  - 2206
KW  - 
UR  - https://doi.org/10.1071/CH9782195 
N2  - The yellow complexes (Me4N)2Cu5(SPh)7 and (Me4N)2Ag5(SPh)7, soluble in aprotic solvents, have been synthesized. Crystal structure results are: (Me4N)2Cu5(SPh)7, a 12.250(1), b 20.151(4), c 11.531(2) &#506;, &#945; 103.50(1), &#946; 90.01(1), &#947; 83.20(1), space group P&#299;, Z 2, 3639 reflections (Mo K&#945;), full anisotropic refinement, R 0.051; (Me4N)2Ag5(SPh)7, a 12.393(1), b 20.633(4), c 11.674(1) &#506; &#945; 103.88(1), &#946; 90.35(1), &#947; 82.96(1)&#176;, space group P&#299;, Z 2, 6400 reflections (Mo K&#945;), full anisotropic refinement, R 0.030. The crystals are isostructural.     The crystals contain a molecular cluster [M5(SPh)7]2-, the structure of which may be visualized in terms of the array of metal atoms which is formed by addition of a unique fifth metal atom over one elongated edge of an approximate tetrahedron of metal atoms. Benzene thiolate ligands bridge the seven edges of the resulting polyhedron of metal atoms. The four metal atoms derived from the tetrahedron possess approximately trigonal planar coordination, while the unique metal atom has approximately linear (S-M-S 175.2&#176; (Cu), 176.0&#176; (Ag)) digonal coordination. There is no evidence of strong metal-metal bonding in the M5S7 core, which has very approximate C2v symmetry. Average bond lengths are Cudig-S, 2.160; Cutrig-S, 2.270; Agdig-S, 2.361; Agtrig-S, 2.502 &#506;. 
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