SYNTHESES AND STRUCTURAL CHARACTERIZATIONS OF FE4S4 CUBANE-LIKE CLUSTER COMPOUNDS CONTAINING CYCLOALKYLTHIOLATE LIGANDS

In a reaction system consisting of FeCl2, tetrathiometallate and cyclo alkylthiolate, two Fe4S4 cubane like cluster compounds were obtained w ith the following crystallographic data: (PhCH2NMe3)(2) [Fe4S4 (SC5H9) (4)](I), monoclinic space group P2(1)/c, a =1. 632 7(4), b =1.122 9(3) , c = 2. 802 5(10) nm, beta= 94.63(2)degrees, Z=4, and R=0.074; (Et4N) (2)[Fe4S4(SC6H11)(4)](II), tetragonal space group I (4) over bar 2m, a =1. 167 05(9), b=1.167 06(2), c=2.063 26(5) nm, Z = 2, D-obs, = 1. 28 g/cm(3), and R = 0. 078. The participation of cycloalkylthiolate liga nd does not obviously arouse the change of the Fe4S4 core structure. M eanwhile, the influence of the cation on the structural symmetry of th e Fe4S4 cluster dianion is also discussed.