Lanthanide(III) morpholine 4-dithiocarbamate complexes: Pr(III) derivative shows first example of polymeric lanthanide(III) dithiocarbamate

Three lanthanide(III) morpholine 4-dithiocarbamate complexes [Ln(Phen)(Mph-Dtc)(3)]center dot xCH(2)Cl(2) [Ln = Pr (1), Nd (2) and Eu (3); Mph-Dtc = morpholine 4-dithiocarbamate; x = 2 (1) or 1 (2, 3)] have been prepared from the reaction of the potassium salt of morpholine 4-dithiocarbamate with lanthanide nitrates and phenanthroline. Complexes 1-3 were characterized by various analytical techniques and their solid state structures were established by single crystal X-ray diffraction analysis. The Ln(III) ions are nine or eight coordinated in 1 and 2, 3 respectively. Interestingly, oxygen atom of one of the three coordinated Mph-Dtc ligands is further coordinated to a Pr(III) ion of the adjacent molecule. Thus, it results in the formation of an one-dimensional (1D) polymeric structure. Thermal stability and optical properties of 1-3 have been investigated.