Tetra­kis(triphenyl­phosphane-κP)silver(I) tetra­fluorido­borate

The title complex, [Ag(C₁₈H₁₅P)₄]BF₄, was prepared by the reaction of silver(I) tetra­fluorido­borate and triphenyl­phosphane in the presence of 1,2-bis­(pyridin-2-yl)ethyl­ene. The Ag^I atom is tetra­hedrally coordinated by four P atoms from triphenyl­phosphane (PPh₃) ligands. Due to symmetry, the tetra­fluorido­borate anion is disordered over three positions (each with one third occupancy). The tetra­fluorido­borate anion does not coordinate to the Ag^I atom.

Bis[μ-bis­(diphenyl­phosphan­yl)methane-κ²P:P′]bis­[(isoquinoline-κN)silver(I)] bis­(trifluoro­methane­sulfonate)–isoquinoline (1/1)

The title complex, [Ag₂(C₂₅H₂₂P₂)₂(C₉H₇N)₂](CF₃SO₃)₂·C₉H₇N, was prepared by the reaction of silver(I) trifluoro­methane­sulfonate with isoquinoline and bis­(diphenyl­phosphan­yl)methane (dppm). The dinuclear mol­ecule is located about a center of inversion and the Ag^I atom is coordinated by two dppm P atoms and one isoquinoline N atom, forming an eight-membered metalla ring. In addition, in the asymmetric unit, there is a half-mol­ecule of isoquinoline located about a center of inversion. Since this mol­ecule does not possess this symmetry, for one position in the ring there is superposition of both a C atom of a C—H group and the isoquinoline N atom. In the structure, the Ag—P distances [2.4296 (9) and 2.4368 (9) Å] agree with the corresponding distances in related structures, while the Ag—N bond length [2.489 (3) Å] is slightly longer than that in related structures. On the other hand, the P—Ag—P angle [156.44 (3)°] is much larger than the corresponding angles in related structures. The trifluoro­methane­sulfonate anions do not coordinate to Ag^I atoms. As is usually found for these anions, the –CF₃ group is disordered over two orientations [occupancies = 0.57 (12) and 0.43 (12)].

Iodido[5-methyl-1H-benzimidazole-2(3H)-thione-κS]bis­(triphenyl­phosphane-κP)copper(I) methanol monosolvate

In the title compound, [CuI(C₈H₈N₂S)(C₁₈H₁₅P)₂]·CH₃OH, the coordination environment around the Cu^I atom is distorted tetra­hedral, defined by two P atoms of two triphenyl­phosphane ligands, one S atom of a 5-methyl-1H-benzimidazole-2(3H)-thione ligand and one I atom. The complex mol­ecules and the methanol solvent mol­ecules are connected via N—H...O and O—H...I hydrogen bonds, forming a chain along [010]. An intra­molecular N—H...I hydrogen bond is also observed.

[Bis[μ-bis­(diphenyl­phosphino)methane-1:2κ²P:P′]-bis­(nitrito-κ²O,O′)]disilver(I) acetonitrile disolvate

The title complex, [Ag₂(NO₂)₂(C₂₅H₂₂P₂)₂]·2CH₃CN, is a centrosymmetric dimer in which two bis(diphenylphosphino)methane ligands bridge two Ag⁺ ions, forming an eight-membered ring with a short Ag...Ag separation of 3.1809 (5) Å. The distorted P₂O₂ coordination of the cation is completed by two O-donors from a symmetric bidentate chelate NO₂⁻ anion [Ag—O = 2.550 (3) and 2.567 (3) Å].

Pyrrolidine-2,5-dione

In the title compound, C₄H₅NO₂, the non-H atoms are nearly coplanar, with a maximum deviation of 0.030 (1) Å. In the crystal, pairs of mol­ecules are linked by N—H...O hydrogen bonds into inversion dimers.

3-Amino-1H-1,2,4-triazole-5(4H)-thione–4,4′-bipyridine (1/1)

The title two-component mol­ecular crystal, C₁₀H₈N₂·C₂H₄N₄S, was obtained unexpectedly by reaction of Zn(NO₃)₂·6H₂O, NH₄BF₄ with 3-amino-1,2,4-triazole-5-thione (3-AMT) and 4,4′-bipyridine in water. The dihedral angle between the pyridine rings in the 4,4′-bipyridine molecule is 17.00 (13)°. In the crystal, N—H...N and N—H...S hydrogen bonds between the components lead to the formation of a three-dimensional network. Furthermore, the structure features face-to-face π–π stacking inter­actions between the 4,4′-bipyridine and triazole rings, with a centroid–centroid distance of 2.976 (2) Å.