Qi-Ming Qiu

6-Nitro-1,3-benzothia-zole-2(3H)-thione.

In the title molecule, C7H4N2O2S2, the nitro group is twisted by 5.5 (1)° from the plane of the attached benzene ring. In the crystal, N—H⋯S hydrogen bonds link pairs of molecules into inversion dimers, which are linked by weak C—H⋯O interactions into sheets parallel to (101). The crystal packing exhibits short intermolecular S⋯O contacts of 3.054 (4) Å and π–π interactions of 3.588 (5) Å between the centroids of the five- and six-membered rings of neighbouring molecules.

[Bis[μ-bis-(diphenyl-phosphino)methane-1:2κ(2)P:P']-bis-(nitrito-κ(2)O,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].

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 AgI 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 AgI atoms. As is usually found for these anions, the –CF3 group is disordered over two orientations [occupancies = 0.57 (12) and 0.43 (12)].

Tetra-kis(triphenyl-phosphane-κP)silver(I) tetra-fluorido-borate.

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 AgI 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 AgI atom.

catena-Poly[[[diaqua­(1,10-phenanthroline-κ2N,N′)zinc]-μ-4,4′-bipyridine-κ2N:N′] dinitrate 4,4′-bipyridine hemisolvate monohydrate]

In the title compound, [Zn(C10H8N2)(C12H8N2)(H2O)2](NO3)2·0.5C10H8N2·H2O, the ZnII atom is coordinated in a distorted octahedral geometry by two N atoms from two 4,4′-bipyridine (4,4′-bipy) ligands, two N atoms from a chelating 1,10-phenanthroline ligand and two O atoms from two mutually cis water molecules. The 4,4′-bipy ligands bridge the ZnII atoms into a chain structure along [100]. The uncoordinated 4,4′-bipy molecule lies on an inversion center. O—H⋯O and O—H⋯N hydrogen bonds connect the cationic chains, the nitrate anions, the uncoordinated 4,4′-bipy molecules and the water molecules into tow-dimensional networks.

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 CuI 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.

Tris(2,2'-bi-1H-imidazole-κN,N)-nickel(II) dinitrate N,N-dimethyl-formamide monosolvate.

The reaction of nickel salts and 4,4′-bipyridine with 2,2′-biimidazole (H2biim) yielded the title complex, [Ni(C6H6N4)3](NO3)2·C3H7NO. The NiII atom is chelated by three H2biim ligands in a distorted octahedral coordination geometry. The two nitrate anions and one dimethylformamide (DMF) molecule are not coordinated. The compound has a three-dimensional structure, formed by extensive hydrogen bonding between [Ni(H2biim)3]2+ cations and nitrate anions, each nitrate anion forming hydrogen bonds with an R 1 2(4) motif. The DMF molecule is disordered over three sets of sites, with occupancy ratios of 0.341 (16):0.350 (17):0.309 (19).

Crystal structure of bis(triphenylphosphine-κP)bis(μ2-1H,1′H-2,2′-biimidazole-κ3N,N′:N′)disilver(I) bis(tetrafluoroborate), C48H42Ag2B2F8N8P2

Abstract C48H42Ag2B2F8N8P2, triclinic, P1̅ (no. 2), a = 9.0101(10) Å, b = 10.9001(12) Å, c = 13.1749(15) Å, α = 76.306(1)°, β = 74.078(1)°, γ = 78.373(2)°, V = 1195.9(2) Å3, Z = 1, Rgt(F) = 0.0316, wRref(F2) = 0.0771, T = 298(2) K.

Crystal structure of bis(triphenylphospine-κP)(methanol-κO)(tetrafluoroborate-κF)silver(I), [Ag(PPh3)2(CH3OH)BF4], C37H34AgBF4OP2

Abstract C37H34AgBF4OP2, monoclinic, P21/n (no. 14), a = 13.748(1) Å, b = 12.757(1) Å, c = 19.716(2) Å, β = 92.657(1)°, V = 3454.1 Å3, Z = 4, Rgt(F) = 0.0361, wRref(F2) = 0.1018, T = 298 K.

Crystal structure of 4,4'-bipyridine dihydrate, C10H8N2·2H2O, C10H12N2O2

Abstract C10H12N2O2, monoclinic, C2 (no. 5), a = 15.811(2) Å, b = 3.7660(5) Å, c = 9.176(1) Å, β = 114.053(2)°, V = 498.9 Å3, Z = 2, Rgt(F) = 0.0555, wRref(F2) = 0.1535, T = 298 K.