catena-Poly[[bis­(quinolin-8-amine-κ²N,N′)cadmium(II)]-μ-cyanido-κ²N:C-[dicyanidonickel(II)]-μ-cyanido-κ²C:N]

The title compound forms a one-dimensional coordination polymer containing alternating six-coordinate Cd and four-coordinate Ni atoms, linked by bridging cyano ligands

[(1,2,5,6-η)-Cyclo­octa-1,5-diene](1-ethyl-3-iso­propyl-1,3-imidazol-2-yl­idene)(tri­phenyl­phosphane)rhodium(I) tetra­fluorido­borate

The cationic complex of the title compound contains an Rh^I atom with a pseudo-square planar coordination environment. It is ligated by an N-heterocyclic carbene, a triphenylphosphane, and a bidentate cylco­octa­diene ligand. Charge balance is achieved from an out-sphere tetra­fluorido­borate anion.

cyclo-Tetra­kis­(μ-2,4,6-tri­methyl­phenyl-κC¹:κC¹)bis­(tri­methyl­phosphane)-1κP,3κP-tetra­copper(I)

The mol­ecular structure of the title complex consists of an eight-membered Cu₄C₄ ring with an alternating arrangement of copper(I) atoms and μ-mesityl groups. Two of the copper(I) atoms are additionally linked to PMe₃ ligands, giving a distorted trigonal coordination.

Tetra­ammonium bis­(metforminium) di-μ₆-oxido-tetra-μ₃-oxido-tetra­deca-μ₂-oxido-octa­oxidodeca­vanadium(V) hexa­hydrate

In the title salt, all O—H and N—H groups in the cations (metforminium and ammonium) and lattice water mol­ecules are donor groups for hydrogen bonds, giving a highly compact crystal structure.

Ethyl 4-oxo-1,4-di­hydro­pyridine-3-carboxyl­ate

Crystal growth of 3′-carb­oxy-3-methyl-[1,4′-bipyridin]-1-ium chloride in ethanol led to single crystals of ethyl 4-oxo-1,4-di­hydro­pyridine-3-carb­oxy­lic acid, which likely resulted from hydrolysis and esterification of the original compound, and its crystal structure was determined by single-crystal X-ray diffraction.

(S)-Alanine ethyl ester tetra­cyanidoborate, (C₅H₁₂NO)[B(CN)₄]

The asymmetric unit of the title mol­ecular salt contains two cations and two anions, which are linked by N—H⋯N hydrogen bonds in the extended structure.

1,1′-(Ethane-1,2-di­yl)bis­(4-{(E)-2-[4-(di­methyl­amino)­phen­yl]ethen­yl}pyridin-1-ium) dibromide ethanol 0.67-solvate

The asymmetric unit of the title solvated mol­ecular salt consists of 1.5 cations, three bromide anions and one ethanol solvent mol­ecule of crystallization. The half-cation is completed by crystallographic inversion symmetry. In the crystal, O—H⋯Br hydrogen bonds and weak C—H⋯Br inter­actions link the components.

Pyridinium 3-nitro­benzoate–3-nitro­benzoic acid (1/1)

The structure of the neutralization product of 3-nitro­benzoic acid and pyridine is reported. A combination of hydrogen bonding and π–π inter­actions link the mol­ecules, forming long-range order.

N-[6-(Di­methyl­amino)-9-phenyl-3H-telluroxan­then-3-yl­idene]-N-methyl­methanaminium hexa­fluoro­phosphate monoclinic polymorph

The title compound is a monoclinic polymorph of the previously reported triclinic form. In the crystal, parallel offset π-stacking and ionic inter­actions consolidate the packing.

3-(4-Methyl­phen­yl)-4H-chromen-4-one

In the title compound, the dihedral angle formed between the plane of the chromenone ring system (r.m.s. deviation = 0.031 Å) and the pendant benzene ring is 31.09 (5)°. In the crystal, weak C—H⋯O hydrogen bonds link the mol­ecules into C(6) chains propagating along the a-axis direction.

Di­ethyl [(2,5-di­iodo-4-methyl­phen­yl)meth­yl]phospho­nate

The title compound was prepared in three steps from p-xylene. Heterodimers between nearly identical mol­ecules are connected via three hydrogen bonds from benzylic and ester methyl­ene groups to phospho­nate. The dimers form chains along the a-axis direction, stabilized by C—H⋯O bridges.

8-Methyl-3-methyl­sulfanyl-8a,8b-di­hydro-5H-1-oxa-2,4-di­aza­ace­naphthyl­ene

In the structure of the di­aza­dihydro­ace­naphthyl­ene derivative reported here, stabilization is provided by C—H⋯N and C—H⋯π inter­actions.