Hexa­kis­(μ₃-2-hy­droxy­naphthalene-1-carboxaldehyde thio­semicarbazonato-κ³N²:S:S)hexa­silver(I) N,N-dimethyl­formamide tetra­solvate

In the title compound, [Ag₆(C₁₂H₁₀N₃OS)₆]·4C₃H₇NO, the hexa­nuclear complex mol­ecule lies about an inversion center. The six Ag atoms form a distorted octa­hedron, with Ag...Ag distances in the range 2.933 (1)–3.401 (1) Å. Each Ag atom is surrounded by one N atom and two thiol­ate S atoms from two deprotonated 2-hy­droxy-1-naphthaldehyde thio­semi­carb­a­zone ligands. Each ligand coordinates three Ag atoms via a bridging thiol­ate S atom and a monodentate N atom, thus two Ag₃S₃ hexa­gonal rings are linked together. Two dimethyl­formamide solvent mol­ecules are located in four sets of sites with half-occupancy and form O...H—N hydrogen bonds to the complex mol­ecule. Intra­molecular O—H...N hydrogen bonds are also present. The discrete hexa­nuclear clusters are further linked through π–π inter­actions into layers parallel to (001), the shortest distance between the centroids of aromatic rings being 3.698 (2) Å.

Methyl 3-[(chloro­meth­oxy)carbon­yloxy]-7-hy­droxy­cholan-24-oate

The title compound, C₂₇H₄₃ClO₆, is a derivative of urso­deoxy­cholic acid, in which the OH group at the 3-position is substituted by a chloro­meth­oxy­carbon­yloxy substituent and the carb­oxy­lic acid group at the 24-position is methyl­ated. The A and B rings are cis-fused, while all other rings are trans-fused. In the crystal, two adjacent mol­ecules located along the b-axis direction are inter­locked head-to-tail due to weak C—H...O hydrogen bonds. Therefore each mol­ecule is linked to four neighbouring mol­ecules by four C—H...O hydrogen bonds, with the OH group at the 7-position and the carbonyl O atom of the ester group acting as the acceptor sites.

4-Cyclo­propyl-1-(6′-de­oxy-1′,2′-O-iso­propyl­idene-α-D-gluco­furanos­yl)-1H-1,2,3-triazole

In the title compound, C₁₄H₂₁N₃O₅, the tetra­hydro­furan ring adopts an envelope conformation with the C atom bearing the substituent as the flap. The penta­furan­ose ring adopts a twisted conformation about the C—C bond fusing the rings. The dihedral angle between these rings (all atoms), which are cis fused, is 72.89 (14)°. The cyclo­propane ring is disordered over two orientations in a 0.576 (5):0.424 (5) ratio; the dihedral angles subtended to the triazole ring are 53.3 (11) and 46.6 (9)°, respectively. In the crystal, the mol­ecules are linked by O—H...N and O—H...O hydrogen bonds, generating (001) sheets. A weak C—H...O inter­action also occurs.

1,2:1′,2′-Di-O-iso­propyl­idenedi­furan­ose-C12 higher carbon sugar

In the title compound, C₁₈H₂₈O₈, the five-membered ring with one O atom attached to the ethyl substituent has a twisted conformation about the C—O bond. The adjacent cis-fused ring with two O atoms also has a twisted conformation about one of the C—O bonds. The dihedral angle between these rings (all atoms) is 59.05 (12)°. The five-membered ring linked to the ethynyl susbtituent is twisted about a C—C bond; the cis-fused adjacent ring is twisted about a C—O bond [dihedral angle between the rings (all atoms) = 71.78 (12)°]. Two intra­molecular O—H...O hydrogen bonds occur. In the crystal, mol­ecules are linked by O—H...O hydrogen bonds, generating [001] chains.

(6,6-Dimethyl-1-phenyl-6,7-di­hydro-5H-pyrrolizin-2-yl)(thio­phen-2-yl)methanone

In the title compound, C₂₀H₁₉NOS, the pyrrolizine ring is essentially planar (r.m.s. deviation = 0.001 Å) while the fused dihydro-pyrrolizine ring adopts an envelope comformation with the C atom bearing the methyl substituents as the flap. The dihedral angles between the pyrrolizine and the phenyl and thio­phene rings are 34.54 (7) and 44.93 (7)°, respectively. In the crystal, weak C—H...O hydrogen bonds link the mol­ecules into infinite zigzag chains parallel to the b-axis direction.

Ethyl 2-[6-(4-methyl­benzo­yl)-7-phenyl-2,3-di­hydro-1H-pyrrolizin-5-yl]-2-oxo­acetate

In the title compound, C₂₅H₂₃NO₄, the pyrrolizine ring is approximately planar with an r.m.s deviation from planarity of 0.0053 Å, while the fused di­hydro­pyrrolizine ring adopts an envelope conformation with the C atom connected to two CH₂ as the flap. The dihedral angles between the fused ring system and the phenyl and methyl­benzoyl rings are 41.65 (11) and 66.30 (8)°, respectively. In the crystal, weak C—H...O hydrogen bonds and C—H...π inter­actions occur. One mol­ecule is linked to five adjacent ones through eight hydrogen bonds, forming a three-dimensional network.