4-Ferrocenyl-1-methyl-3-benzoyl­spiro­[pyrrolidine-2,11′-indeno­[1,2-b]quinoxaline]

In the title compound, [Fe(C₅H₅)(C₃₁H₂₄N₃O)], the pyrrolidine ring adopts a twist conformation. The pyrrolidine ring is almost perpendicular to the indeno­quinoxaline ring system, making a dihedral angle of 84.44 (5)°. The cyclo­penta­dienyl rings of the ferrocene moiety adopt an eclipsed conformation. The crystal packing features weak C—H...N and C—H...π inter­actions.

11-Hy­droxy-9-[1-(4-methyl­phen­yl)-4-oxo-3-phenyl­azetidin-2-yl]-18-oxo-10-oxa-2-aza­penta­cyclo­[9.7.0.0^1,8.0^2,6.0^12,17]octa­deca-12,14,16-triene-8-carbonitrile

In the title compound, C₃₃H₂₉N₃O₅, the four-membered ring of the β-lactam fragment is essentially planar (r.m.s. deviation = 0.0122 Å), with the carbonyl O atom displaced from this ring by 0.856 (9) Å. The mean planes of the meth­oxy­phenyl and phenyl rings are inclined at dihedral angles 85.10 (7) and 21.56 (14)°, respectively, with respect to the mean plane of the four-membered ring. The pyrrolidine rings adopt envelope conformations with C atoms lying 0.535 (4) and 0.519 (4) Å out of the planes formed by the remaining ring atoms. The furan ring also adopts an envelope conformation with a C atom 0.560 (3) Å out of the plane formed by the remaining ring atoms. The nine-membered indene ring is almost planar (r.m.s. deviation = 0.0240 Å), with the carbonyl O atom displaced by 0.145 (3) Å from this ring. The mol­ecular structure is stabilized by a strong intra­molecular O—H...N hydrogen bond and the crystal structure is consolidated by C—H...O hydrogen bonds.

Methyl 12-hydroxy-10-[1-(4-meth­oxy­phen­yl)-2-oxo-3-phen­oxy­azetidin-4-yl]-11-oxa-3-aza­hexa­cyclo­[11.7.1.0^2,9.0^2,12.0^3,7.0^17,21]henicosa-1(20),13,15,17(21),18-penta­ene-9-carboxyl­ate

In the title compound, C₃₇H₃₄N₂O₇, both pyrrolidine rings adopt envelope conformations. The β-lactam ring is close to planar (r.m.s. deviation = 0.0395 Å) and makes a dihedral angle of 83.35 (15)° with the furan ring. The O atom attached to the β-lactam ring deviates by 0.187 (2) Å from the mean plane of the ring. The β-lactam ring makes dihedral angles of 14.90 (15) and 27.72 (17)° with the meth­oxy­phenyl and phenyl rings, respectively. The crystal packing features C—H...O hydrogen bonds.

4′-Methyl-1H-14′,19′-dioxa-4′-aza­spiro­[indole-3,5′-tetra­cyclo­[18.4.0.0^2,6.0^8,13]tetra­cosa­ne]-1′(24′),8′,10′,12′,20′,22′-hexa­ene-2,7′(3H)-dione

In the title compound, C₂₉H₂₈N₂O₄, the indoline ring system is essentially planar, with a maximum deviation of 0.027 (2) Å; the carbonyl O atom lies 0.102 (1) Å out of the least-squares plane of the indole ring. The pyrrolidine ring adopts a C-envelope conformation, with a C atom displaced by 0.643 (2) Å from the mean plane formed by the remaining ring atoms. The pyrrolidine ring makes a dihedral angle of 86.1 (8)° with the indoline ring system. In the crystal, N—H...O hydrogen bonds result in the formation of cyclic centrosymmetric dimers [R₂²(8)]. C—H...π inter­actions also occur, leading to a chain along the b-axis direction. There is a rather weak π–π electron inter­action between the pyrrazole and benzene rings, with a centroid–centroid distance of 3.765 (1) Å.

4′-Methyl-14′,19′-dioxa-4′-aza­spiro­[acenaphthyl­ene-1,5′-tetra­cyclo­[18.4.0.0^2,6.0^8,13]tetra­cosa­ne]-1′(24′),8′,10′,12′,20′,22′-hexa­ene-2,7′(1H)-dione

In the title compound, C₃₃H₂₉NO₄, the acenaphthyl­ene ring system is essentially planar (r.m.s. deviation = 0.0290 Å). The pyrrolidine ring adopts a C-envelope conformation with a C atom displaced by 0.671 (2) Å from the mean-plane formed by the remaining ring atoms. The pyrrolidine ring is fused to acenaphthyl­ene ring system making a dihedral angle of 88.0 (7)°. In the crystal, mol­ecules are linked into R²₂(9) dimers via C—H...N and C—H...O hydrogen bonds. Two C atoms act as donors to the same O atom acceptor, resulting in the formation of R²₁(7) ring motifs. These two motifs combine to form hydrogen-bonded sheets running along the a- and b-axis directions.