Pd(II) and Au(I) chloride complexes with tetrakis(butylthiomethyl)calix[4]arene: Synthesis and crystal structures

Two novel complexes, (AuCl) 4 L 3 ( I ) and (PdCl 2 ) 2 L 3 ( II ) (L 3 is calix[4]arene-thioether), were synthesized and their structures were determined. In complex I , one thioether group of molecule L 3 is coordinated to every Au atom. In complex II , the bidentate coordination of L 3 to the Pd atoms is observed; two thioether groups are in the trans -positions in the Pd square surrounding. Both complexes have the layered crystal lattices. In the Au complex, the layers are more stable due to the short contacts Au-Au (3.19–3.23 Å).