(η⁶-N,N-Diethyl­aniline)(η⁴-1,2,3,4-tetra­methyl­cyclo­buta­diene)­cobalt(I) hexa­fluoro­phosphate

The title isocobaltocenium salt, [Co(C₈H₁₂)(C₁₀H₁₅N)]PF₆, is shown to exist as discrete monomers with near equivalent C—C bonds in the cyclo­buta­diene ring.

4-Amino­pyridinium isonicotinate monohydrate

The 4-amino­pyridinium isonicotinate salt was isolated as a monohydrate, C₅H₇N·C₆H₄NO·H₂O, with a layered cation–water–anion structure. Hydrogen-bonding between layers utilizes all hydrogen-bonding donors and acceptors, whilst π stacking dominates interactions within the organic layers.

2-(1-Piperidinyl)-1,3-benzo­thia­zole

An unusual de-alkyl­ation reaction between 2-chloro­benzo­thia­zole and N-ethyl­piperidine gave 2-(1-piperidinyl)-1,3-benzo­thia­zole, C₁₂H₁₄N₂S, as pale-yellow orthorhombic crystals. Discrete mol­ecules consist of a planar benzo­thia­zole fragment with a piperidine ring in a chair conformation.

Carbamazepine N,N-di­methyl­form­amide solvate

In the title compound, C₁₅H₁₂N₂O·C₃H₇NO, carbamazepine mol­ecules form the R₂²(8) N—H...O hydrogen-bonded dimer arrangement observed in the crystal structures of each of the four known an­hydro­us polymorphs. The mol­ecules of N,N-di­methyl­form­amide are located between adjacent carbamazepine dimers and form an N—H...O hydrogen bond to the anti-oriented NH group of the carbox­amide moiety of carbamazepine.

Carbamazepine furfural hemisolvate

In the title compound, C₁₅H₁₂N₂O·0.5C₅H₄O₂, carbamazepine mol­ecules retain the R₂²(8) N—H...O hydrogen-bonded dimer arrangement observed in the crystal structures of each of the four known an­hydro­us polymorphs. The furfural mol­ecule is located between adjacent carbamazepine dimers and is hydrogen bonded to only one of the anti-oriented NH groups available on the dimer.

3,4-Dichloro-1-nitro­benzene–aniline (2/1)

The solvate structure of 3,4-dichloro-1-nitro­benzene with aniline, 2C₆H₃Cl₂NO₂·C₆H₇N, is reported. Ribbons of 3,4-dichloro­nitro­benzene, formed by Cl...Cl and N—O...Cl inter­actions, are linked together via N—H...O hydrogen bonds with aniline into an undulating two-dimensional sheet.

Hydro­chloro­thia­zide–aniline (1/1)

Hydro­chloro­thia­zide forms a 1:1 solvate with aniline, C₇H₈ClN₃O₄S₂·C₆H₇N. The crystal structure contains a hydrogen-bonding network comprising two N—H...N and three N—H...O contacts.

Hydro­chloro­thia­zide–1,4-dioxane (1/1)

Hydro­chloro­thia­zide forms a 1:1 solvate with 1,4-dioxane, C₇H₈ClN₃O₄S₂·C₄H₈O₂ [systematic name: 6-chloro-3,4-di­hydro-2H-1,2,4-benzothia­diazine-7-sulfonamide 1,1-dioxide–1,4-dioxane ()]. The asymmetric unit comprises one mol­ecule of hydro­chloro­thia­zide and halves of two solvent mol­ecules arranged around inversion centres. The structure contains a hydrogen-bonding network comprising three N—H...O and one N—H...N hydrogen bonds.

3,4-Dichloro-1-nitro­benzene–1,4-dioxane (4/1)

The solvate structure of 3,4-dichloro-1-nitro­benzene with 1,4-dioxane, C₆H₃Cl₂NO₂·0.25C₄H₈N₂, is reported. The asymmetric unit comprises two independent 3,4-dichloro-1-nitro­benzene mol­ecules and half of a 1,4-dioxane mol­ecule, the solvent molecule being disposed about a centre of inversion. Double chains of 3,4-dichloro-1-nitro­benzene are linked by Cl...Cl inter­actions and 1,4-dioxane mol­ecules via C—H...O hydrogen bonds into a two-dimensional sheet.