Abstract: | Mo3,OS3(dtp)4(H2O)] reacts with NaOAc·3H2O in Py to give the title compound. The crystal data are as follows: Mo2OS3)(OAc)2(dtp)2·Py]?0.5H,O(dtp = S3P(OC2H5)2]?, Py = C5H5N); M = 976.64; triclinic; space group P1 ; a=11.704(5), b=14.169(7), c= 11.688 (5) Å α=109.94(4) β = 91.53(4), γ = 91.93(4)°; V= 1819(1) Å2; Z=2; Dc = 1.78 g·cm?3 λ(Mo Kα) = 0.71069 Å μ=15.15 cm?1; F(000) = 970 T=296 K; final R=0.071 for 1652 reflections with I>3σ(I). In the molecule, the Mo3OS3] core is surrounded by two bridging OAc groups and two terminal chelate dtp groups attached to the {Mo3} triangle in a symmetric style, and the Py ligand is coordinated to the Mo atom at the apex of {Mo3} triangle with the nitrogen. This novel configuration is obtained for the first time with Mo—N bond length being 2.27 (2) Å and three Mo—Mo bond lengths 2.584 (4), 2.587 (4) and 2.657(4) Å, respectively. As a whole, the molecule has a virtual C2 symmetry. |