Supramolecular assemblies of cis-palladium complexes dominated by CH⋯Cl interactions

Two cis-related palladium(II) complexes [PdCl2(PPh3)(tu)] (1) and [PdCl2(tmen)] (2) {PPh3 = triphenylphosphine, tu = thiourea, tmen = N,N,N′,N′-tetramethylethylenediamine} have been synthesized and characterized by elemental analysis, IR and NMR spectroscopies, and single crystal X-ray diffraction. In 1, NH⋯Cl hydrogen bonds are responsible for the formation of a dimer which connects to an adjacent one through weak CH⋯Cl interactions, yielding 1D tapes. The crystal packing of compound 2 consists of zigzag ribbons of [PdCl2(tmen)] self-assembled by CH⋯Cl hydrogen bonds which also holds the chains together, giving rise to a 2D layered structure.

The compounds [PdCl2(PPh3)(thiourea)] (1) and [PdCl2(N,N,N′,N′-tetramethylethylenediamine)] (2) were synthesized and characterized. The self-organization of 1 through NH⋯Cl and CH⋯Cl hydrogen bonds yielded 1D tapes. The crystal packing of 2 consists of zigzag ribbons of [PdCl2(tmen)] self-assembled by CH⋯Cl hydrogen bonds, affording a 2D layered structure.Figure optionsDownload as PowerPoint slide