14-Bromo-12-chloro-2,16-dioxapentacyclohenicosa-3(8),10,12,14-tetraene-7,20-dione

In the title compound, C19H16BrClO4, both the fused xanthene rings and one of the cyclohexane rings adopt envelope conformations, while the other cyclohexane ring is in a chair conformation. In the crystal, molecules are linked by C-H...O hydrogen bonds, forming infinite chains running along [10-1] incorporating R22(16) ring motifs. In addition, C-H...[pi] interactions and weak [pi]-[pi] stacking interactions [centroid-centroid distance = 3.768 (3) Å] help to consolidate the packing

2,2′-[(E,E)-cis-(Cyclo­hexane-1,4-di­yl)bis­(nitrilo­methanylyl­idene)]diphenol

In the title compound, C20H22N2O2, the asymmetric unit contains two independent half-mol­ecules, which are both completed by crystallographic inversion symmetry. The cyclo­hexane rings of both mol­ecules adopt chair conformations; the N atoms are in equatorial orientations in one mol­ecule and in axial orientations in the other. Both mol­ecules feature two intra­molecular O—H⋯N hydrogen bonds, which generate S(6) rings

9-(5-Bromo-2-hy­droxy­phen­yl)-10-(2-hy­droxy­prop­yl)-3,3,6,6-tetra­methyl-1,2,3,4,5,6,7,8,9,10-deca­hydro­acridine-1,8-dione

The dihydro­pyridine ring in the title compound, C26H32BrNO4, adopts an envelope conformation with the methine C atom representing the flap. The cyclo­hexenone rings also adopt envelope conformations. The phenolic hy­droxy group forms an intra­molecular hydrogen bond to one of the two keto O atoms. Inter­molecular weak C—H⋯O hydrogen bonding is present in the crystal structure. The hy­droxy­propyl group is disordered over two sets of sites with an occupancy ratio of 0.636 (6):0.364 (6)

2-((E)-{[4-(Hy­droxy­meth­yl)phen­yl]imino}­meth­yl)phenol

The title compound, C14H13NO2, adopts the enol–imine tautomeric form, with an intra­molecular O—H⋯N hydrogen bond which generates an S(6) ring motif. The dihedral angle between the aromatic rings is 7.85 (7)°. The crystal structure is stabilized by O—H⋯O, O—H⋯N and C—H⋯O hydrogen bonds, forming a two-dimensional array that stacks along the a axis. In addition, a C—H⋯π inter­action contributes to the stabilization of the crystal packing

7-Bromo-9-(2-hy­droxy-4,4-dimethyl-6-oxocyclo­hex-1-en-1-yl)-3,3-dimethyl-2,3,4,9-tetra­hydro-1H-xanthen-1-one

In the xanthene ring system of the title compound, C23H25BrO4, the 4H-pyran ring is almost planar [maximum deviation = 0.040 (3) Å] and the cyclo­hexene ring adopts a sofa conformation. The cyclo­hexene ring attached to the xanthene system is puckered [Q T = 0.427 (3) Å, θ = 55.0 (4) ° and ϕ = 164.4 (6) °]. In the crystal, mol­ecules are linked to each other by O—H⋯O and C—H⋯O hydrogen bonds

Ethyl (Z)-2-(4-chloro­benzyl­idene)-3-oxobutano­ate

The C=C double-bond in the title compound, C13H13ClO3, has a Z configuration. The aliphatic substituents at one end of the double bond, i.e. the CH3CO– and C2H5O2C– groups, are aligned at 82.1 (3)° with respect to each other

2-Anilino-3-(2-hy­droxy­prop­yl)-4-methyl-1,3-thia­zol-3-ium chloride

In the title compound, C13H17N2OS+·Cl−, the thia­zolium ring mean plane makes a dihedral angle of 55.46 (9)° with the benzene ring. In the propanol group, the N—C—C—C and N—C—C—O torsion angles are 172.58 (15) and 52.9 (2)°, respectively, and the S—C—C—C torsion angle is 178.99 (18)°. In the crystal, mol­ecules are linked by O—H⋯Cl and N—H⋯Cl hydrogen bonds, forming zigzag chains along [001]. There is also a C—H⋯Cl inter­action present

3,3,6,6-Tetra­methyl-9-[6-(3,3,6,6-tetra­methyl-1,8-dioxo-2,3,4,5,6,7,8,9-octa­hydro-1H-xanthen-9-yl)pyridin-2-yl]-2,3,4,5,6,7,8,9-octa­hydro-1H-xanthene-1,8-dione

In the title mol­ecule, C39H45NO6, the two tetra­methyl­octa­hydroxanthen-1,8-dione substituents are arranged approximately parallel to each other and approximately perpendicular to the plane of the pyridine ring. The six-membered xanthene rings adopt flattened boat conformations with the O and methine C atoms deviating from the plane of the other four atoms

4a-Hy­droxy-3,3,6,6-tetra­methyl-9-[6-(3,3,6,6-tetra­methyl-1,8-dioxo-2,3,4,5,6,7,8,9-octa­hydro-1H-xanthen-9-yl)pyridin-2-yl]-2,3,4,4a,5,6,7,8,9,9a-deca­hydro-1H-xanthene-1,8-dione ethanol hemisolvate hemihydrate

The pyridine ring in the title compound, C39H47NO7·0.5C2H5OH·0.5 H2O, is connected to one 3,3,6,6-tetra­methyl-1,8-dioxoxanthenyl and one 4a-hy­droxy-3,3,6,6-tetra­methyl-1,8-dioxodeca­hydroxanthenyl substituent in the 2- and 6-positions of the ring. In the former substituent, the six-membered xanthenyl ring adopts a flattened envelope conformation (with the methine C atom as the flap) while in the latter, the six-membered xanthenyl ring adopts a twisted envelope conformation (with the C atom bearing the hy­droxy group representing the flap). The hy­droxy H atom forms an intra­molecular hydrogen bond to the pyridyl N atom. An ethanol solvent mol­ecule is disordered with respect to a water mol­ecule in a 1:1 ratio. The water mol­ecule itself is disordered over two positions of equal occupancy

10-(2-Hy­droxy­eth­yl)-9-(2-hy­droxy­phen­yl)-3,3,6,6-tetra­methyl-1,2,3,4,5,6,7,8,9,10-deca­hydro­acridine-1,8-dione

The dihydro­pyridine ring in the title compound, C25H31NO4, adopts an envelope conformation with the methine C atom representing the flap. The cyclo­hexenone rings also adopt envelope conformations with the C atoms bearing the methyl C atoms representing the flaps. The phenolic hy­droxy group forms an intra­molecular hydrogen bond to one of the two keto O atoms. The hy­droxy group of the N-bonded alkyl chain forms an inter­molecular hydrogen bond to the other keto O atom of an adjacent mol­ecule. The latter hydrogen bond leads to the formation of a helical chain running along the b axis