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An efficient thioxanthone synthesis from benzoic acid esters is disclosed. Various thioxanthones were prepared by iridium-catalyzed C–H borylation of benzoic acid esters followed by copper-catalyze...

The dication of the title compound, [Cu2(C28H28P2)2(C16H16N2)2](PF6)2·2CH2Cl2, has crystallographically imposed inversion symmetry. The copper(I) cation is coordinated in a distorted tetrahedral geometry by two N atoms of a chelating 3,4,7,8-tetramethyl-1,10-phenanthroline ligand and two P atoms of two bridging 1,4-bis(diphenylphosphanyl)butane ligands, forming a 14-membered ring. An intramolecular π–π interaction stabilizes the conformation of the dication. In the crystal, dications are linked by π–π interactions involving adjacent phenanthroline rings, forming chains running parallel to [111]. Weak C—H...F hydrogen interactions are also observed.

The crystal structure of a dinuclear copper(I) complex bearing bridging 1,4-bis­(di­phenyl­phosphan­yl)butane and 3,4,7,8-tetra­methyl-1,10-phenanthroline ligands is described., The dication of the title compound, [Cu2(C28H28P2)2(C16H16N2)2](PF6)2·2CH2Cl2, has crystallographically imposed inversion symmetry. The copper(I) cation is coordinated in a distorted tetra­hedral geometry by two N atoms of a chelating 3,4,7,8-tetra­methyl-1,10-phenanthroline ligand and two P atoms of two bridging 1,4-bis­(di­phenyl­phosphan­yl)butane ligands, forming a 14-membered ring. An intra­molecular π–π inter­action stabilizes the conformation of the dication. In the crystal, dications are linked by π–π inter­actions involving adjacent phenanthroline rings, forming chains running parallel to [111]. Weak C—H⋯F hydrogen inter­actions are also observed.