1-Formyl-c-3,t-3-dimethyl-r-2,c-6-di­phenyl­piperidin-4-one

In the title compound, C20H21NO2, the piperidine ring adopts a distorted boat conformation. The phenyl rings substituted at the 2- and 6-positions of the piperidine ring subtend angles of 86.0 (1) and 67.3 (1)° with the mean plane of the piperidine ring (all six non-H atoms). The crystal packing features C—H⋯O inter­actions

c-3,t-3-Dimethyl-r-2,c-7-diphenyl-1,4-diazepan-5-one

In the title compound, C19H22N2O, the diazepine ring adopts a distorted chair conformation. One of the N—H groups forms an inter­molecular N—H⋯O hydrogen bond generating an R 2 2(8) graph-set motif. The other N—H group does not form a hydrogen bond

r-2,c-6-Bis(4-methoxy­phenyl)-c-3,t-3-dimethyl-1-nitro­sopiperidin-4-one

In the title compound, C21H24N2O4, the piperidine ring adopts a distorted boat conformation. The crystal structure is stabilized by C—H⋯π inter­actions involving one of the methoxy­phenyl rings

5-Dichloro­acetyl-4-methyl-2,3,4,5-tetra­hydro-1H-1,5-benzodiazepin-2-one hemihydrate

There are two crystallographically independent organic mol­ecules in the asymmetric unit of the title compound, C12H12Cl2N2O2·0.5H2O. The benzodiazepine ring adopts a distorted boat conformation in both molecules. The crystal packing is controlled by N—H⋯O, C—H⋯O and O—H⋯O intra- and inter­molecular hydrogen bonds. A graph-set motif of R 3 3(14) dimer formation by a combination of N—H⋯O, O—H⋯O and C—H⋯O hydrogen bonds stabilizes the mol­ecules and extends along a axis

t-3-Ethyl-r-2,c-7-bis­(4-methoxy­phen­yl)-1,4-diazepan-5-one

The title compound, C21H26N2O3, crystallizes with two independent mol­ecules in the asymmetric unit. In both independent mol­ecules, the diazepine ring adopts a chair conformation. In the crystal, the independent mol­ecules exist as N—H⋯O hydrogen-bonded R 2 2(8) dimers which are linked via N—H⋯O hydrogen bonds, forming tetra­mers. The tetra­mers are linked by C—H⋯O hydrogen bonds. In one of the molecules in the asymmetric unit, the terminal C atom of the ethyl group is disordered over two positions with refined occupancies of 0.742 (4) and 0.258 (4)

1-Chloro­acetyl-r-2,c-6-bis­(4-methoxy­phen­yl)-t-3-methyl­piperidin-4-one

There are two crystallographically independent mol­ecules in the asymmetric unit of the title compound, C22H24ClNO4. The piperidine ring in both mol­ecules adopts a distorted boat conformation. The crystal packing is stabilized by C—H⋯O and C—H⋯Cl inter­actions

1-Formyl-r-2,c-6-bis­(4-methoxy­phen­yl)-c-3,t-3-dimethyl­piperidin-4-one

In the title compound, C22H25NO4, the piperidine ring adopts a distorted boat conformation. The two benzene rings are approximately perpendicular to each other, making a dihedral angle of 86.2 (8)°. The crystal packing is stabilized by C—H⋯O and C—H⋯π inter­actions

1-Formyl-t-3,t-5-dimethyl-r-2,c-6-diphenyl­piperidin-4-one

In the title compound, C20H21NO2, the piperidine ring adopts a distorted boat conformation. The dihedral angle between the two phenyl rings is 61.33 (18)°. In the crystal, inter­molecular C—H⋯O inter­actions link the mol­ecules into zigzag C(5) chains running parallel to [100]

(Benzyl­amine)chloridobis(ethane-1,2-diamine)cobalt(III) dichloride hemihydrate

In the title compound, [CoCl(C2H8N2)2(C7H9N)]Cl2·0.5H2O, there are two crystallographically independent cations and anions and one water mol­ecule in the asymmetric unit. Both CoIII ions are bonded to two chelating ethylenediamine ligands, one benzylamine molecule and one chloride ion. The crystal packing is through N—H⋯O, N—H⋯Cl and O—H⋯Cl inter­actions