Ditopic Ditiocarbamate Ligands for the Production of Trinuclear Species

Publication date: Available online 26 May 2017 Source:Arabian Journal of Chemistry Author(s): Edgar Marín-Carrillo, Adrián Ruiz-Martinez, Hugo Valdés, Reyna Reyes-Martinez, Simon Hernandez-Ortega, Bethsy Adriana Aguilar-Castillo, David Morales-Morales Reactions of group 10 transition metals with the ditopic ligand dipicolyldithiocarbamate (DPDTC) were performed. Thus, 1:2 reactions of [Ni(CH3COO)2], [Pd(COD)Cl2] or [Pt(COD)Cl2] with DPDTC produced monomeric complexes of the type [M(κ2 -SCS-DPDTC)2, M= Ni (1), Pd (2) or Pt (3)] with the dithiocarbamate ligand (DTC) coordinated in a typical chelate κ2 -SCS fashion. Interestingly, the reaction of [NiCl2] with DPDTC, under similar conditions, afforded the organic compound 2-(pyridin-2-ylmethyl)imidazo[1,5-a]pyri-dine-3(2H)-thione (4) as unique product. In order to prove the ditopic nature of the ligand DPDTC, complex [Pd(κ2 -SCS-DPDTC)2] (2) was further reacted with [ZnCl2] in a 1:2 molar ratio, to yield the trinuclear complex [Cl2Zn(κ 2-NN-DPDTC-SCS-κ2 )Pd(κ2 -SCS-DPDTC-NN-κ 2)ZnCl2] (5). The molecular structures of all compounds were determinate by typical analytical techniques including the unequivocal determination of all structures by single crystal X-ray diffraction analysis. As expected, complexes 1-3 are isostructural, the metal centres exhibiting slightly distorted square-planar geometries. While in 5, the trinuclear nature of the complex in confirmed exiting a nice combination of tetrahedral-square pl...
Source: Arabian Journal of Chemistry - Category: Chemistry Source Type: research