L. Sudha

Chloridobis(ethyl­enediamine-κ2N,N′)(n-pentyl­amine-κN)cobalt(III) dichloride monhydrate

The title complex, [CoCl(C5H13N)(C2H8N2)2]Cl2·H2O, comprises one chloridobis(ethylenediamine)(n-pentylamine)cobalt(III) cation, two chloride counter-anions and a water molecule. The CoIII atom of the complex is hexacoordinated by five N and one Cl atoms. The five N atoms are from two chelating ethylenediamine and one n-pentylamine ligands. Neighbouring cations and anions are connected by N—H⋯Cl and N—H⋯O hydrogen bonds to each other and also to the water molecule.

Methyl 5-ferrocenyl-5a-hydr­oxy-1-methyl-10-oxo-2,3,3a,4,5a,10-hexa­hydro-1H-indeno[1,2:2′,3′]furo[3′,4′-b]pyrrole-3a-carboxyl­ate

In the title compound, [Fe(C5H5)(C21H20NO5)], the pyrrolidine and cyclopentanone rings exhibit a twist conformation. The pyrrolidine ring is almost perpendicular to the cyclopentanone ring, making a dihedral angle of 81.91 (6)°. The molecular conformation is stabilized by an intramolecular O—H⋯N hydrogen bond and C—H⋯O interactions. The crystal structure is stabilized by intermolecular C—H⋯O interactions.

3-(4-Chloro­phen­yl)-4-(4-methoxyphen­yl)-6-(phenyl­selenylmeth­yl)-2,3,3a,3b,4,5,5a,6,1′′,2′′,3′′,4′′-do­deca­hydro­azeto[2′,3′:3,4]pyrrolo[1,2-b]isoxazole-2-spiro-2′′-naphthalene-5,1′′-dione

In the title compound, C36H31ClN2O4Se, the four-membered β-lactam ring is fused to a pyrrolidine ring. The central five-membered ring of the fused tricyclic system exhibits an envelope conformation with the N atom as the flap, while the other five-membered ring exhibits a twist conformation. The chlorophenyl ring is almost perpendicular to the pyrrolidine ring, making a dihedral angle of 73.45 (1)°. The crystal structure is stabilized by weak intermolecular C—H⋯O interactions and the packing is further enhanced by C—H ⋯N interactions and π–π interactions between benzene rings of tetralone groups in molecules related by an inversion center, with a centroid–centroid separation of 3.8923 (2) Å.

4'-(4-Methoxy-phen-yl)-1,1',1''-trimethyl-dispiro-[indoline-3,2'-pyrrolidine-3',3''-pyrrolidine]-2,2'',5''-trione.

In the title compound, C24H25N3O4, the pyrrolidine ring adopts an envelope conformation while the pyrrolidine-2′′,5′′-dione ring adopts a twist conformation. The indoline unit is planar [maximum deviation of −0.050 (9) Å] and forms a dihedral angle of 40.36 (4)° with the methoxyphenyl ring. Intramolecular C—H⋯O hydrogen bonds are observed. In the crystal, molecules are linked into a two-dimensional network parallel to the ab plane by intermolecular C—H⋯O hydrogen bonds and C—H⋯π interactions.

Methyl 4-(4-chloro-phen-yl)-1,2,3,3a,4,4a,5,12c-octa-hydro-benzo[f]chromeno[3,4-b]pyrrolizine-4a-carboxyl-ate.

There are two molecules in the asymmetric unit of the title compound, C26H24ClNO3. The dihedral angles between the naphthalene ring system and the chlorophenyl substituent are 58.76 (9) and 51.59 (8)° in the two molecules. In the pyrrolizine ring system, both the pyrrolidine rings adopt envelope conformations and the dihydropyran rings adopt half-chair conformations. In the pyrrolizine ring system of one of the molecules, one of the C atoms is disordered over two positions with site occupancies of 0.69 (2) and 0.31 (2). The crystal packing is stabilized by weak intramolecular C—H⋯O interactions and the crystal packing is stabilized by weak C—H⋯π interactions.

Methyl 3-[ferrocen­yl(hydr­oxy)meth­yl]-1-methyl-2′-oxospiro­[pyrrolidine-2,3′-indoline]-3-carboxyl­ate

In the title compound, [Fe(C5H5)(C20H21N2O4)], the pyrrolidine ring exhibits an envelope conformation with the spiro-C atom deviating from the plane of the remaining four atoms. The pyrrolidine ring is almost perpendicular to the indolinone ring [dihedral angle = 87.52 (7)°]. The structure is stabilized by an intramolecular O—H⋯N hydrogen bond and by intermolecular C—H⋯O and N—H⋯O interactions.

Methyl 3-(4-chlorophenyl)-1-methyl-1,2,3,3a,4,11c-hexahydrobenzo[f]chromeno[4,3-b]pyrrole-3a-carboxylate

In the title compound, C24H22BrNO3, the dihydropyran ring adopts a half-chair conformation, whereas the pyrrolidine ring is in an envelope conformation. The bromophenyl group is oriented at an angle of 66.44 (4)° with respect to the naphthalene ring system. In the crystal structure, molecules are linked into centrosymmetric dimers by C—H⋯π interactions and the dimers are connected via C—H⋯Br hydrogen bonds. The crystal structure is further stabilized by π–π interactions [centroid–centroid distance = 3.453 (1) Å].

cis-3-Methyl-1-phenyl-8a,9,10,11,12,12a,12b-hexa­hydro-1H,3bH-pyrazolo[3,4:2′,3′]pyrano[4′,5′,6′-kl]xanthene

The asymmetric unit of the title compound, C23H22N2O2, contains two independent molecules, A and B. The cyclohexane ring of molecule B is disordered, with occupancies for the major and minor conformers of 0.570 (9) and 0.430 (9), respectively. The cyclohexane ring adopts a boat conformation in molecule A and in the major conformer of molecule B, and a chair conformation in the minor conformer of molecule B. In both independent molecules, one of the dihydropyran rings adopts a boat conformation while the other is in a half-chair conformation. The dihedral angle between the pyrazole and phenyl rings is 16.0 (1)° in molecule A and 12.9 (1)° in molecule B. The crystal packing is stabilized by C—H⋯O and C—H⋯N intermolecular hydrogen bonds.

1-(4-Methoxy­phen­yl)-7-phenyl-3-(phenyl­selenylmeth­yl)perhydro­isoxazolo[2′,3′:1,2]pyrrolo[3,4-b]azetidine-6-spiro-2′-chroman-2,4′-dione

In the title compound, C35H30N2O5Se, the pyrrolidine ring adopts an envelope conformation and the oxazolidine ring is in a twist conformation. The tetrahydropyran ring adopts a half-chair conformation. The methoxyphenyl ring is twisted away from the attached azetidinone ring by 15.7 (1)°. In the crystal structure, intermolecular C—H⋯O interactions link the molecules into a two-dimensional network.

1-[2-Oxo-1'-phenyl-2',3',5',6',7',7a'-hexa-hydroindoline-3-spiro-3'-1'H-pyrrolizin-2'-yl]-3-phenyl-prop-2-en-1-one.

In the title compound, C29H26N2O2, one of the pyrrolidine rings in the pyrrolizine system is disordered, with site occupancies of ca 0.55 and 0.45. Both components of the disordered pyrrolidine ring adopt envelope conformations, whereas the other pyrrolidine ring adopts a twist conformation. The molecules are linked into centrosymmetric dimers by N—H⋯O hydrogen bonds and the dimers are connected via C—H⋯π interactions.