Bis[5-(anthracen-9-ylmeth­yl)-1,5,9-tri­aza­cyclododecan-1-ium] tetra­chlorido­zincate

The structure of the title salt comprising two monoprotonated polyamine ligands and one tetra­chloro­zincate(II) anion was analyzed and compared with those of structurally related compounds bearing different macrocyclic frameworks and pendant arms. The protonated nitro­gen atoms engaged in intra­molecular hydrogen bonding with other nitro­gen atoms within the macrocyclic ring.

4,12-Diselena-5,6,13,14-tetra­aza­tri­cyclo­[9.3.0.0^3,7]tetra­deca-1(11),3(7),5,13-tetra­ene

Two almost planar 1,2,3-selena­diazo­les are annulated to a cyclo­octa-1,4-diene with a boat–chair conformation, giving the mol­ecule a butterfly shape.

2′-Amino-5′-benzoyl-5-bromo-6′-methyl-2-oxo­spiro­[indoline-3,4′-pyran]-3′-carbo­nitrile

In the title compound, the indoline ring system is almost planar, while the pyran ring is in flattened-boat conformation. In the crystal, N—H⋯O and N—H⋯N hydrogen bonds link the mol­ecules, enclosing R²₂(8) and R²₂(12) ring motifs, into (001) sheets.

N,N′-[Oxybis(benzene-4,1-di­yl)]diacetamide

In the title compound, the phenyl groups are twisted away from coplanarity with the ether linkage, forming a dihedral angle of 59.49 (4)° with each other. In the crystal, the acetamide N—H groups form inter­molecular N—H⋯O hydrogen bonds to acetamide O atom, with both NH groups donating to the same mol­ecule. Thus, ladder-like chains exist in the [101] direction.

tert-Butyl [(4-fluoro-3-isopropoxyisoxazol-5-yl)meth­yl](phenyl­sulfon­yl)carbamate

The crystal structure of a 4-fluoro­isoxazole compound bearing a sulfonamide functionality is described.