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The present paper reports our sequential efforts to investigate the structures and properties of flexible disulfoxide?lanthanide complexes. Combining our reported results, on the basis of changing synthesis conditions and using a co-ligand, six new complexes, [Ln(meso-L)4](ClO4)3(H2O)n (n = 0.5, Ln = Eu (1), Gd (2); n = 0, Ln = Tb (3)) and [Ln(meso-L)2(phen)2](ClO4)3(CHCl3)2 (Ln = Eu (4), Gd (5), and Tb (6)) (herein, L = 1,2-bis(ethylsulfinyl)ethane, phen = 1,10-phenanthroline) were synthesized, and their structures were characterized by IR spectroscopy, elemental analysis, and X-ray single-crystal diffraction. The dependence of the formation of 1?3 on the solvents used and reaction ratios in the preparation was confirmed. Complexes 1?3 are isomorphous ionic complexes, and the coordination cation is chiral and has a mononuclear structure, in which the LnIII atom is eight-coordinated by four L ligands. Complexes 4?6 are also isomorphous mononuclear ionic complexes, and in each complex cation, the central LnIII atom is eight-coordinated by two L ligands and two phen molecules. In 1?6, all the L ligands exhibit the meso configuration and bis-monodentate chelating coordination mode. Further, the absorption and luminescent spectra of L, phen and complexes 4?6 in solution were investigated at room temperature. The absorption spectra show that only a very slight shift of the absorption band occurred for the ligands L and phen when coordinating to metal ions, being consistent with their origin. The photoluminescence of 4 and 6 exhibits the usual metal-centred emission spectra arising from ligand-to-metal energy transfer and the emission of ? ? ?* transitions from the phen ligand; the latter is also seen in the emission spectrum of 5. [ABSTRACT FROM AUTHOR]

A new dithioether silver(I) complex, {[Ag(L)1.5]NO3}n (1) has been prepared by the reaction of AgNO3 with 1,3-bis(benzylthio)propane (L) in methanol/chloroform. The structure was characterized by single-crystal X-ray diffraction analysis: rhombohedral system, space group R −3c, with a =b = 15.651(7), c = 39.26(4) Å, V = 8328(1) Å3, and Z = 6. The crystal structure consists of [Ag(L)1.5]+ cations and NO3− anions. In 1, each silver(I) center is coordinated equivalently to three sulfur donors from three different ligands to give a trigonal-planar coordination geometry. Each L links two adjacent silver(I) centers in bis-monodentate bridging mode to form a 2D (6,3) network sheet. Furthermore, these 2D sheets are linked by the weak coordination interactions between nitrate ions and silver(I) atoms to form a 3D brick-wall framework. [ABSTRACT FROM AUTHOR]

The molecular structure of the title compound, C18H22O2S2, exhibits an R,S configuration for the S atoms. The mol­ecule sits on a centre of symmetry located at the midpoint of the central C—C bond. The C and S atoms between the two phenyl rings are essentially coplanar and make a 87.3 (3)° dihedral angle with the phenyl ring planes. [ABSTRACT FROM AUTHOR]