catena-Poly[copper(I)-bis(μ-trifluoro­methane­sulfonato-κ2 O:O′)-copper(I)-bis(μ-trimethyl trithio­phosphite)-κ2 P:S;κ2 S:P]

The title compound, [Cu2(CF3SO3)2(C3H9PS3)2]n, crystallizes as infinite chains in which two trimethyl trithio­phosphite ligands and two trifluoro­methane­sulfonate anions bridge the essentially tetra­hedrally coordinated CuI ions in an alternating fashion. The P and one S atom of each trimethyl trithio­phosphite ligand are employed for coordination. The mol­ecular structure exhibits the rare motif of copper(I) bridged by two trifluoro­methane­sulfonate anions generating eight-membered rings

[Bis­(4-methyl-1,3-thia­zol-2-yl-κN)methane]­tricarbonyl­dichlorido­tungsten(II)

The title compound, [WCl2(C9H10N2S2)(CO)3], is a hepta­coordinate tungsten(II) complex with a capped–octa­hedral coordination sphere in which one CO ligand caps a face formed by a chloro ligand and the two other carbonyls. The chloro ligands are mutually trans positioned at an angle of 156.98 (7)°. The chelating bis­(4-methyl-1,3-thia­zol-2-yl)methane ligand coordinates with the imine N atoms. In the crystal, mol­ecules are linked into chains parallel to [201] by weak C—H⋯O contacts between the CH2 group of the bis­(4-methyl­thia­zol-2-yl)methane ligand and the O atom of the capping CO group

Bis(1,1,2,2-tetramethyldiphosphane-1,2-dithione-κ2 S,S′)gold(I) trifluoro­methane­sulfonate

In the title compound, [Au(C4H12P2S2)2](CF3SO3), the gold(I) atom is tightly bonded to two S atoms belonging to different ligand mol­ecules and forms two weaker contacts to the remaining S atoms. The coordination geometry around gold is inter­mediate between linear-dicoordinate and tetra­hedral with an S—Au—S angle of 161.49 (3)°

Excimer and Exciplex Formation in Gold(I) Complexes Preconditioned by Aurophilic Interactions

CITATION: Schmidbaur, H. & Raubenheimer, H. G. 2020. Excimer and Exciplex Formation in Gold(I) Complexes Preconditioned by Aurophilic Interactions. Angewandte Chemie International Education, 59(35):14748-14771. doi:10.1002/anie.201916255The original publication is available at https://onlinelibrary.wiley.com/journal/15213773Excimers and exciplexes are defined as assemblies of atoms or molecules A/A’ where interatomic/intermolecular bonding appears only in excited states such as [A2]* (for excimers) and [AA’]* (for exciplexes). Their formation has become widely known because of their role in gas-phase laser technologies, but their significance in general chemistry terms has been given little attention. Recent investigations in gold chemistry have opened up a new field of excimer and exciplex chemistry that relies largely on the preorganization of gold(I) compounds (electronic configuration AuI (5d10)) through aurophilic contacts. In the corresponding excimers, a new type of Au···Au bonding arises, with bond energies and lengths approaching those of ground-state Au@Au bonds between metal atoms in the Au0 (5d106s1) and AuII(5d9) configurations. Excimer formation gives rise to a broad range of photophysical effects, for which some of the relaxation dynamics have recently been clarified. Excimers have also been shown to play an important role in photoredox binuclear gold catalysis.https://onlinelibrary.wiley.com/doi/10.1002/anie.201916255Publishers versio

(m-Phenyl­enedimethyl­ene)bis­(triphenyl­phospho­nium) bis­[chlorido(penta­fluoro­phen­yl)aurate(I)] dichloro­methane disolvate

The title compound, (C44H38P2)[AuCl(C6F5)]2·2CH2Cl2, crystallizes with a twofold rotation axis through the central benzene ring in the bis-phospho­nium dication. In the crystal, the dications and anions are ordered into columns running parallel to the c axis by contacts of the pro-ylidic CH2 groups with the Cl atom of one and an ortho-F atom of another anion. The space between the columns is occupied by CH2Cl2 solvent mol­ecules

[(3-Methylphenyl)(triphenylphosphonio)methanide-κC]triphenyl­phospho­rane}(penta­fluoro­phenyl-κC)gold(I) diethyl ether solvate

The metal atom in the title ylid–gold(I) adduct, [Au(C6F5)(C26H23P)]·C4H10O, exists in a linear coordination environment [C—Au—C = 174.1 (2)°]. The mol­ecule has a short intra­molecular contact involving an aromatic H atom (Au⋯H = 2.64 Å); two adjacent mol­ecules are linked by an Au⋯Hylid inter­action (Au⋯H = 3.14 Å)

Bis[μ-1,2-bis­(diphenyl­phosphino)ethane-κ2 P:P′]digold(I)(Au—Au) bis­(trifluoro­methane­sulfonate) acetonitrile disolvate

The title compound, [Au2(C26H24P2)2](CF3SO3)2·2CH3CN, comprises a cyclic cation with a short intra­molecular aurophilic inter­action of 2.9220 (3) Å. The trifluoro­methane­sulfonate anions and acetonitrile solvent mol­ecules are located in channels formed by the complex cations that run along the crystallographic c axis. Each counter-anion is also engaged in a C—H⋯O contact with one of the methyl­ene H atoms of a 1,2-bis­(diphenyl­phosphino)ethane (dppe) ligand; another C—H⋯O contact involving an aromatic H atom is also observed

1,1,2,2-Tetra­kis(1,3-benzoxazol-2-yl)ethene

The title compound, C30H16N4O4, reveals crystallographic and mol­ecular symmetry and accordingly the asymmetric unit comprises one half-mol­ecule. The dihedral angle between the planes of the two geminal benzoxazole rings is 74.39 (5)°. The packing features weak C—H⋯N and π–π inter­actions [centroid–centroid distance = 3.652 (1) Å]

4-Bromo-N-(diisopropoxyphosphor­yl)benzamide

In the title compound, C13H19BrNO4P, the crystal structure is stabilized by inter­molecular N—H⋯O hydrogen bonds between the phosphoryl O atom and the amide N atom which link the mol­ecules into centrosymmetric dimers. These dimers are further packed into stacks along the c axis by inter­molecular C—H⋯O and C—H⋯π inter­actions