
%0 Journal Article
%A Howlader, NC 
%A Haight, Jr GP 
%A Hambley, TW 
%A Lawrance, GA 
%A Rahmoeller, KM 
%A Snow, MR 
%T Structure and redox properties of the molybdenum(IV) metal cluster K<sub>5</sub>[Mo<sub>3</sub>S<sub>4</sub>(CN)<sub>9</sub>].7H<sub>2</sub>O
%J Australian Journal of Chemistry
%D 1983/02/01
%V 36
%N 2
%P 377-383
%K 
%R https://doi.org/10.1071/CH9830377
%U https://www.publish.csiro.au/paper/CH9830377 
%X The anionic molybdenum(IV) cluster [Mo3S4(CN)9]5- has been subjected to X-ray crystal structure analysis. The potassium salt crystallized in the triclinic space group P1, a 10.634(1), b 11.888(3), c 24.892(2) Å, &#945; 89.56(2), &#946; 79.86(1), &#947; 76.53(2)º, Z 4. The three MoIV atoms in each unit of approximately CSL3v symmetry are situated at the corners of an equilateral triangle with Mo-Mo distance 2.765(7) Å. There are three S2- ligands bridging between pairs of Mo atoms, and a unique S2- ligand located uniformly above the plane of the equilateral triangle. Distorted octahedral coordination of each MoIV is completed by three CN- ligands to each of the three metal centres. The ion is structurally similar to the [MO3S(S2)6]2- precursor, and to [Mo3O4X9]n- analogues. In dimethyl sulfoxide, the cluster is irreversibly reduced in a single step near -2 V (v. saturated calomel electrode), but exhibits a quasi-reversible oxidation at + 0.51 V. On the coulometric time scale, the complex is irreversibly oxidized to MoV monomer. 
