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1.  Tris(η5-cyclo­penta­dien­yl)-tris­[η6-[9,10-dihydro­anthracene-9,10-endo-3′,4′-(N-benz­yl)pyrrolidine]]triruthenium(II) tris­(hexa­fluoro­phosphate) acetone disolvate 
In the title compound, [Ru3(C25H23N)(C5H5)3]·3PF6·2C3H6O], the cation is a triruthenium complex of a 9,10-dihydro­anthracene derivative. Three RuCp+ (Cp is cyclo­penta­dien­yl) groups are bonded to the three aromatic rings of the ligand. Surprisingly, the pyramidalized N atom of the heterocycle (Σ C—N—C = 329.0°) points towards the anthracenyl group, so losing its coordinative ability. There is an inter­molecular C—H⋯π inter­action involving an acetone mol­ecule and the adjacent benzyl ring of the ligand. In the crystal, mol­ecules are linked via a number of C—H⋯O and C—H⋯F inter­actions and a C—H⋯π inter­action, leading to the formation of a three-dimensional supra­molecular structure. One of the Cp groups is disordered over two positions, with refined occupancies of 0.695 (14):0.305 (14). Two of the three hexa­fluoro­phospate anions are disordered, with refined occupancies of 0.630 (6):0.370 (6) and 0.771 (8):0.229 (8). One of the two solvent acetone mol­ecules is also disordered, with refined occupancies of 0.82 (2):0.18 (2).
PMCID: PMC3470180  PMID: 23125624
2.  (1S,8R,15S,19R)-17-Benzyl-17-aza­penta­cyclo­[,7.09,14.015,19]nona­deca-2(7),3,5,9(14),10,12-hexa­ene chloro­form monosolvate 
In the title compound, C25H23N·CHCl3, the dihydro­anthracene unit is bent with a dihedral angle between the benzene rings of 57.82 (8)°. The N atom of the pyrrolidine heterocycle, which has an envelope conformation with the N atom as the flap, exhibits a pronounced pyramidalization [Σ(C—N—C) = 328.07°], indicating an accentuated N-donor character. In the crystal, this behaviour is evident by the C—H⋯N hydrogen bond involving a solvent mol­ecule and the N atom. The absolute configuration at the C-atom fused positions of the pyrrolidine group were crystallographically confirmed to be S and R.
PMCID: PMC3470235  PMID: 23125679
3.  1,5-Dimethyl-3-[(3-phenyl-4,5-dihydro-1,2-oxazol-5-yl)meth­yl]-1H-1,5-benzodiazepine-2,4(3H,5H)-dione 
The reaction of 3-allyl-1,5-dimethyl-1,5-benzodiazepine-2,4-dione and benzaldoxime leads to the title compound, C21H21N3O3. The mol­ecular structure is built up from two fused six- and seven-membered rings linked to a chain including a five- and six-membered ring (isoxazoline and phen­yl) via a methyl­ene group. The seven-membered ring displays a boat conformation. The dihedral angle between the two six-membered rings is 74.3 (1)°.
PMCID: PMC3009296  PMID: 21589149
4.  10,10′-Methyl­enebis[2,3-dihydro-1H-benzo[e]pyrrolo[1,2-a][1,4]diazepine-5,11(10H,11aH)-dione] dihydrate 
The organic mol­ecule and uncoordinated water mol­ecule in the crystal of the title compound, C25H24N4O4·2H2O, both lie on special positions of twofold symmetry. A twofold rotation axis passes through the methyl­ene C atom connecting the two dihydro­benzopyrrolodiazepindionyl parts. The seven-membered C5N2 ring adopts a boat conformation.
PMCID: PMC2971374  PMID: 21578290
5.  1-Benzyl-3-phenyl­quinoxalin-2(1H)-one 
The ten-membered fused ring system in the title compound, C21H16N2O2, is planar (r.m.s. deviation = 0.03 Å). The phenyl substituent is aligned at 15.1 (1)° with respect to the mean plane through this system, whereas the phenyl ring of the benzyl substitutent is aligned at 84.4 (1)°.
PMCID: PMC2971429  PMID: 21578291
6.  1-Acetyl-4-phenyl-5a,6,7,8,9,9a-hexa­hydro-5H-1,5-benzodiazepin-2(1H)-one 
The seven-membered ring of the title compound, C17H20N2O2, adopts an approximate boat conformation while the cyclo­hexyl ring adopts a chair conformation. In the crystal, adjacent mol­ecules are linked by N—H⋯O hydrogen bonds into a zigzag chain running along the c axis of the monoclinic unit cell.
PMCID: PMC2971313  PMID: 21578269
7.  1-Methyl-3-phenyl­quinoxalin-2(1H)-one 
The phenyl substituents in both independent mol­ecules of the title compound, C15H12N2O, are twisted with respect to the quinoxaline system [dihedral angles = 19.3 (1) and 30.4 (1)°].
PMCID: PMC2970207  PMID: 21577794
8.  10-Allyl-2,3-dihydro-1H-pyrrolo[2,1-c][1,4]benzodiazepine-5,11(10H,11aH)-dione 
The compound, C15H16N2O2, features a pyrroline ring fused with a seven-membered diazepine ring; the latter system adopts a boat conformation (with the methine C atom as the prow and the two C atoms of the aromatic ring as the stern). A CH2–CH2 segment of the pyrroline ring is disordered over two positions in a 1:1 ratio.
PMCID: PMC2970423  PMID: 21577793

Results 1-8 (8)