5,6-Dimethyl-1,2,4-triazin-3-amine

In the crystal structure of the title compound, C5H8N4, adjacent mol­ecules are connected through N—H⋯N hydrogen bonds, resulting in a zigzag chain along [100]. The amino groups and heterocyclic N atoms are involved in further N—H⋯N hydrogen bonds, forming R 2 2(8) motifs

catena-Poly[[(isoquinoline-κN)(triphenylphospane-κP)copper(I)]-μ-thio­cyanato-κ2 N:S]

In the title coordination compound, [Cu(NCS)(C9H7N)(C18H15P)]n, the CuI atom is tetra­hedrally coordinated by one N atom from an isoquinoline ligand, one P atom from a triphenyl­phospane ligand, and one N and one S atom from two thio­cyanate anions. The thio­cyanide anions bridge the CuI atoms into a chain along [100]. π–π inter­actions between the pyridine and benzene rings of the isoquinoline ligands connect the chains [centroid-to-centroid distance = 3.722 (3) Å]

catena-Poly[silver(I)-bis­[μ-bis­(diphenyl­phosphino)methane-κ2 P:P′]-μ-thio­cyanato-κ2 S:S-silver(I)-μ-thio­cyanato-κ2 S:N]

The title compound, [Ag(NCS)(C25H22P2)]n, contains two Ag+ ions, two thio­cyanate ions and two bis­(diphenyl­phosphino)methane (dppm) ligands in the asymmetric unit. One of the thiocyanate ions bridges the two Ag+ ions in a μ2-mode from its S atom and the two dppm ligands bridge the silver ions in a μ1,μ1 mode. The remaining SCN− ion bridges the binuclear units via its N and S atoms, generating a one-dimensional polymer propagating in [01]: the resulting AgP2SN and AgP2S2 coordination geometries could be described as distorted tetra­hedral

(1,10-Phenanthroline-κ2 N,N′)(triphenyl­phosphine-κP)silver(I) trifluoro­methane­sulfonate

The structure of the title complex, [Ag(C12H8N2)(C18H15P)]CF3SO3, is based on a distorted trigonal–planar N2P coordination of the AgI ion, provided by two N atoms of the bidentate phenanthroline ligand and one P atom of the triphenyl­phosphine ligand. The phenanthroline ligand and one phenyl ring of the triphenyl­phosphine ligand almost lie in one plane (maximum deviation = 0.014 Å from the best planes). The crystal structure may be stabilized by an inter­molecular C—H⋯O hydrogen bond between the phenanthroline ligand and the O atom of the trifluoro­methane­sulfonate anion

A tetra­silver(I)ditungsten(VI) cluster with sulfide and bis­(diphenyl­phosphino)methane ligands

The asymmetric unit of the title complex, [Ag4W2S8(C25H22P2)3]·2C3H7NO, tris­[μ2-bis­(diphenyl­phosphino)meth­ane]-3:6κ2 P:P′;4:5κ2 P:P′;5:6κ2 P:P′-μ5-sulfido-2:3:4:5:6κ5 S-μ3-sulfido-1:3:4κ3 S-tetra-μ2-sulfido-1:3κ2 S;1:4κ2 S;2:5κ2 S;2:6κ2 S-disulfido-1κS,2κS-tetra­silver(I)ditungsten(VI) N,N-dimethyl­formamide disolvate, contains two [WS4]2− anions, four silver cations, three bidentate–bridging bis­(diphenyl­phosphino)methane (dppm) ligands and two N,N-dimethyl­formamide (DMF) solvent mol­ecules. The coordination geometry of each Ag atom is distorted tetra­hedral. Two Ag ions are coordinated by μ2-S and μ5-S atoms, and by two P atoms from two dppm ligands, while the other two Ag atoms are coordinated by μ2-S, μ3-S and μ5-S atoms, and by one P atom from a dppm ligand

Two new species of Ismarus Haliday (Hymenoptera, Ismaridae) from Yunnan, China

The genus Ismarus Haliday are rarely collected parasitoids in the small family Ismaridae. In this study, two new species are described from China’s Yunnan Province: Ismarus robustus Chen & Yan, sp. nov. and Ismarus unisulcus Chen & Yan, sp. nov. An updated key to the Chinese species of the genus is provided

Tetra­kis(triphenyl­phosphane-κP)silver(I) trifluoro­methane­sulfonate dichloro­methane monosolvate

In the title compound, [Ag(C18H15P)4]CF3O3S·CH2Cl2, the Ag atom is coordinated by four P atoms from four PPh3 ligands. The P—Ag—P angles are in the range 108.02 (6)–110.15 (6)°, which confirms the distorted tetra­hedral environment around the Ag atom

[μ-1,2-Bis(diphenyl­phosphino)ethane-κ2 P:P′]bis­{[1,2-bis­(diphenyl­phosphino)ethane-κ2 P,P′]cyanidocopper(I)} methanol disolvate

The title centrosymmetric complex, [Cu2(CN)2(C26H24P2)3]·2CH3OH, consists of two five-membered [Cu(dppe)CN] rings [dppe is 1,2-bis­(diphenyl­phosphino)ethane] bridged by one μ2-dppe ligand, and two methanol solvent mol­ecules. The angles around the central metal atom indicate that each CuI atom is located in the center of a distorted tetra­hedron. The coordination sphere of each CuI atom is formed by three P atoms from two dppe ligands, and one C atom from the cyanide ligand. The crystal structure is stabilized by O—H⋯N hydrogen bonds, which are formed by the O—H donor group from methanol and the N-atom acceptor from a cyanide ligand