Synthesis and structure of tris(dimethyldithiocarbamato) (l,10-phenanthroline)lanthanide complexes

摘要

Syntheses and structures of three new lantha-nide coordination compounds with dithiocarbamate ligands are reported. The complexes [Ln(Me2dtc)3(phen)] (Ln = Pr (1),Nd (2) and Gd (3),Me_2dtc = N,N-dimethyldithiocar-bamate and phen = 1,10-phenanthroline) were synthetized by a simple metathesis between lanthanide(III) nitrate and sodium dimethyldithiocarbamate followed by addition of 1,10-phenanthroline without the exclusion of moisture. Single crystal X-ray analysis showed that all three complexes are isostructural, crystallizing in the triclinic space group PI. The Ln—S and Ln—N bond lengths decrease in agreement with the decrease in ionic radii across the lanthanide series. Similar structures with Et_2dtc ligands show no significant effect on the changes of Ln—S bond lengths and also on the S—Ln—S bite angles. The crystal packing of described complexes is formed via π—π stacking interactions and C—H... S non-covalent contacts