TRI-MU-IODOHEXACHLOROTRIAQUOTRIRHENATE(III)-3-HYDRATE AND TRI-MU-IODOHEXACHLOROTRIAQUOTRIRHENATE(III)-2,5-HYDRATE [RE3(MU-I)3CL6(H2O)3]BULLET-3H2O AND [RE3(MU-I)3CL6(H2O3]BULLET-2,5H2O

For the first time two mixed ligand (heteroleptic) rhenium(III) iodide-chloride hydrates, ReICl2.2H2O (1) and ReICl2.1 5/6H2O (2) have been synthesized from aqueous solutions under slightly different conditions: (1) at ambient temperature and (2) at temperatures around 100-degrees-C. The crystal structures were determined from four-circle diffractometer data: (1): orthorhombic, Iba2; a = 2502.4(2) pm; b = 1313.6(1) pm; c = 1188.6(1) pm; Z = 24; R = 0.049; R(w) = 0.038; (2): monoclinic, P2(1)/c; a = 857.02(6) pm; b = 1438.6(1) pm; c = 2990.6(2) pm; beta = 93.08(1)-degrees; Z = 24; R = 0.046; R(w) = 0.034. Both hydrates contain trimeric molecules [Re3(mu-I)3(i,b)Cl6o,t(H2O)3i,t] which are connected to each other via water molecules by hydrogen bonding. According to high temperature powder X-ray diffraction, data (1) transforms to (2) by dehydration at 110-degrees-C. Infrared spectra were recorded and are discussed in connection with the crystallographic results.