Tricarbonyl­(η⁵-cyclo­pentadienyl)(3-iodo­propyl)tungsten(II)

In the title compound, [W(C₅H₅)(C₃H₆I)(CO)₃], the W atom is coordinated by a cyclo­pentadienyl ligand, three carbonyl ligands and an iodo­alkyl chain in a distorted square-pyramidal arrangement. In the crystal structure, the molecules pack with the iodo­alkyl chains in non-interdigitated layers.

Bis(p-toluidinium) tetra­chloro­zincate(II)

The title organic–inorganic hybrid salt, bis(p-toluidinium) tetra­chloro­zincate(II), (C₇H₇NH₃)₂[ZnCl₄], crystallizes in a structure consisting of alternating ionic and organic layers. Weak C—H...π hydrogen-bonding interactions occur in the organic layer, and strong charge-assisted N—H...Cl inter­actions are present in the inorganic layer between ammonium groups and discrete [ZnCl₄]²⁻ tetrahedra.

4-Amino­pyridinium nitrate

The structure of the organic–inorganic hybrid material 4-amino­pyridinium nitrate, C₅H₇N₂⁺·NO₃⁻, exhibits classical and bifurcated strong N—H...O hydrogen-bonding inter­actions, as well as weaker C—H...O inter­actions. Organic 4-amino­pyridinium cations and inorganic nitrate anions inter­act to form a one-dimensional hydrogen-bonded ribbon in the a direction. Neighbouring ribbons inter­act to form two-dimensional corrugated hydrogen-bonded sheets parallel to the ac plane.

1,2-Bis(2-amino­phen­oxy)ethane

The crystal structure of 1,2-bis­(2-amino­phen­oxy)ethane, C₁₄H₁₆N₂O₂, exhibits inter­molecular close contacts between the amine groups and O atoms of neighbouring mol­ecules. In addition, weak C—H...O hydrogen-bonding inter­actions are present. A crystallographic twofold axis bisects the central C---C bond.

3,5-Bis(2-hydroxy­ethyl)-4-oxahexa­cyclo­[5.4.1.0^2,6.0^3,10.0^5,9.0^8,11]dodeca­ne

The title mol­ecule, C₁₅H₂₀O₃, exhibits C—C bond lengths that deviate from normal values. A number of long and short C—C bonds are observed. Neighbouring mol­ecules inter­act via strong O—H...O hydrogen bonds, forming two-dimensional hydrogen-bonded sheets.