Synthetic and structural studies of heteroleptic platinum(II) and palladium(II) complexes containing thiacrown and monodentate phosphane ligands

Abstract

The thiacrown, ([9]aneS 3), forms elongated square pyramidal complexes of the type [S 2 P 2 +S 1 ] or [S 2 PCl+ S 1 ] with Pd(II) and Pt(II) where the M-S 1 axial distance elongates and shortens with the σdonor ability of the phosphane and chlorido ligands.

Synthesis of mononuclear and dinuclear palladium (II) complexes containing oxadithioether ligands and their catalytic activities in norbornene polymerization

“…[1][2][3] Among these complexes, particular attention has recently been given to palladium (II) complexes with sulfur-containing compounds, especially thiacrown ligands. [4][5][6][7][8][9][10][11][12][13][14] These compounds have interesting properties, including the stabilization of rare mononuclear trivalent oxidation states, C-H bond activation, anion recognition, photophysical properties, intermolecular π-π stacking motifs, and axial ligand-metal interactions in square planar complexes. [8,9,[15][16][17][18][19][20][21][22][23][24][25] The last structural property for Pd (II) complexes are of theoretical interest, as these complexes may contain a weak bonding component and serve as important models in associative mechanisms for ligand substitution reactions in d 8 square planar complexes.…”

“…[4][5][6][7][8][9][10][11][12][13][14] These compounds have interesting properties, including the stabilization of rare mononuclear trivalent oxidation states, C-H bond activation, anion recognition, photophysical properties, intermolecular π-π stacking motifs, and axial ligand-metal interactions in square planar complexes. [8,9,[15][16][17][18][19][20][21][22][23][24][25] The last structural property for Pd (II) complexes are of theoretical interest, as these complexes may contain a weak bonding component and serve as important models in associative mechanisms for ligand substitution reactions in d 8 square planar complexes. [8,10] Sulfur species are poisons for many catalytic processes; therefore, sulfur-containing compounds are not usually employed as ligands in transition metal-catalyzed reactions.…”