Pt, Pd and Hg Complexes with Potentially Tridentate Telluroether Ligands

• Published in: European journal of inorganic chemistry 2015-08, Vol.2015 (22), p.3748-3757
• Main Authors: Kirsten, Lars, Schwade, Vania D., Selter, Lars, Hagenbach, Adelheid, Piquini, Paulo C., Schulz Lang, Ernesto, Abram, Ulrich
• Format: Article
• Language: English
• Subjects: Chelates; Density functional theory; Equivalence; Formations; Ligand design; Ligands; Mathematical analysis; Mercury; Palladium; Platinum; Solid-state structures; Tellurium
• ISSN: 1434-1948; 1099-0682
• DOI: 10.1002/ejic.201500365

N‐[3‐(Phenyltellanyl)propyl]picolinamide (HL1) or N‐[N″,N″‐methyl(phenyl)aminothiocarbonyl]‐N′‐[3‐(phenyltellanyl)propyl]benzamidine (HL2) react with equivalent amounts of PtCl2 or PdCl2 with formation of neutral [MCl(L1‐κN,N′,Te)] or [MCl(L2‐κS,N,Te)] chelates. A corresponding reaction of HL2 with HgCl2 results in the formation of [HgCl2(HL2‐κS,Te)]. Treatment of [PtCl(L1‐N,N′,Te)] with elemental iodine results in the exclusive oxidation of the metal ion and the platinum(IV) complex [PtI3(L1‐κN,N′,Te)] could be isolated in reasonable amounts. A decomposition of the tellurium‐containing ligand and the formation of [PdI2(PhTeI)2] was observed during a similar procedure with the corresponding palladium complex. The bonding situation inside the latter compound was analyzed through density functional theory calculations. Reactions between MCl2 (M = Pt, Pd, Hg) and potentially tridentate telluroether ligands with additional picolinamido or thiocarbamoylbenzamidinato units give neutral chelates. Long‐range Te···M, Te···halide, or Te···S interactions assemble the obtained molecules to dimeric and/or polymeric arrangements in the solid state.