The title compound, C(16)H(17)NOS(2), consists of a carbazole skeleton with tetra-hydro-furan and dithiol-ane rings. In the indole ring system, the benzene and pyrrole rings are nearly coplanar, forming a dihedral angle of 1.57 (15)°. The cyclo-hexenone and tetra-hydro-furan rings have envelope conformations, while the dithiol-ane ring adopts a twist conformation. In the crystal structure, pair...

In the title compound, C(9)H(20)N(2)S, the n-butyl groups are in syn and anti positions in relation to the C=S bond. In the crystal, two mol-ecules are connected by two N-H⋯S=C hydrogen bonds into a centrosymmetric dimer. Another N-H⋯S=C hydrogen bond links the dimers, forming layers with a hydro-philic inter-ior and a hydro-phobic exterior, which spread across the (100) plane. Inter-lacing of ...

In the crystal of the title compound, C(8)H(10)NO(2) (+)·Cl(-), alternating layers of hydro-phobic and hydro-philic zones stack along the c axis. The chloride anions are sandwiched between the 4-(carboxy-meth-yl)anilinium layers, forming inter-molecular O-H⋯Cl and N-H⋯Cl hydrogen bonds with the ammonium and carboxyl groups of the cations. In addition, inter-molecular N-H⋯O and weak C-H⋯O and C-...

X-ray crystallographic analysis of the title hydro-bromide salt, C(10)H(20)N(+)·Br(-), of (1R,2S,3R,5R,8aR)-3-hydroxy-meth-yl-5-methyl-octa-hydro-indolizine-1,2-diol defines the absolute and relative stereochemistry at the five chiral centres in steviamine, a new class of polyhydroxy-lated indolizidine alkaloid isolated from Stevia rebaudiana (Asteraceae) leaves. In the crystal structure, mol-e...

The asymmetric unit of the title hydrated salt, C(6)H(14)NO(2) (+)·F(-)·H(2)O, contains a discrete cation with a protonated amino group, a halide anion and one water mol-ecule. The crystal structure is composed of double layers parallel to (010) held together by N-H⋯O, N-H⋯F, O-H⋯F and C-H⋯F hydrogen bonds, forming a two-dimensional network, and stacked along the c axis, viz. hydro-philic layer...

The title compound, C17H13ClO6, is an asymmetric alicyclic dianhydride containing a chloro-methyl-substituted tetra-hydro-naphthalene moiety. The cyclo-hexene ring in the tetra-hydro-naphthalene moiety exhibits an envelope conformation with the tertiary C atom as the flap The dihedral angle between the two anhydride rings is 79.96 (6)°, while those between the benzene ring and the non-fused and...

In the asymmetric unit of the title compound, 2C(7)H(9)ClN(+)·C(9)H(6)O(4) (2-)·2H(2)O, there are two crystallographically independent cations, one dianion and two water mol-ecules. The dihedral angle between the two carboxyl-ate groups of the dianion is 78.1 (2)°. In the crystal, the components are held together by N-H⋯O, O-H⋯O and C-H⋯O hydrogen bonds, forming a layer parallel to the bc plane...

In the title compound, C17H22N2O6, the di-hydro-pyrimidine ring adopts a flattened boat conformation. The dihedral angle between the benzene ring and the mean plane of the di-hydro-pyrimidine ring is 75.25 (6)°. In the crystal, mol-ecules are linked via pairs of N-H⋯O hydrogen bonds, forming inversion dimers with an R 2 (2)(8) ring motif which are linked through N-H⋯O and weak C-H⋯O hydrogen bo...

In the title compound, C(18)H(13)BrN(4)O(3)S(3), the tetra-hydro-pyridine ring adopts a half-chair conformation with the central methyl-ene-C atom of the NCH(2)CH(2) unit at the flap. The dihedral angles between the tetra-hydro-pyridine ring and the pyridine and two thio-phene rings are 69.34 (13) 5.66 (13) and 68.63 (13)°, respectively, while the dihedral angle between the 1,3,4-oxadiazole and...

The title compounds, C15H19N4O+·Cl- and C15H19N4O+·Cl-·H2O, obtained in attempts to synthesize metal complexes using tetra-hydro-indazole as a ligand, were characterized by NMR, IR and X-ray diffraction techniques. The partially saturated ring in the tetra-hydro-indazole core adopts a sofa conformation. An intra-molecular N-H⋯N hydrogen bond formed by the protonated amino group and the N atom o...