Search

In the syn‐ and anticlinal isomers of the title compound, C22H18N2O6, the indole moiety is not completely planar, with the pyrrolidine ring being distorted very slightly towards a conformation intermediate between half‐chair and envelope. The molecular and packing structures in the crystals of these isomers are stabilized by C—H⋯O interactions.

The title compound, 3,5,7‐tri­aza‐1‐azoniatri­cyclo­[3.3.1.13,7]­decane 2,4‐di­nitro­phenolate monohydrate, C6H13N4+·C6H3N2O5−·H2O, the 1:1 hydrate adduct of hexa­methyl­enetetr­amine (HMT) and 2,4‐di­nitro­phenol, undergoes a temperature phase transition. In the room‐temperature phase, the adduct crystallizes in the monoclinic P21/mspace group, whereas in the low‐temperature phase, the adduct crystallizes in the triclinic Pspace group. This phase transition is reversible, with the transition temperature at 273 K, and the phase transition is governed by hydrogen bonds and weak interactions. In both these temperature‐dependent polymorphs, the crystal structure is alternately layered with sheets of hexa­methyl­enetetr­amine and sheets of di­nitro­phenol stacked along the caxis. The hexa­methyl­enetetr­amine and di­nitro­phenol moieties are linked by intermolecular hydrogen bonds. The water mol­ecule in the adduct plays an important role, forming O—H⋯O hydrogen bonds which, together with C—H⋯O hydrogen bonds, bridge the adducts into molecular ribbons. Extra hydrogen bonds and weak interactions exist for the low‐temperature polymorph and these interconnect the molecular ribbons into a three‐dimensional packing structure. Also in these two temperature‐dependent polymorphs, di­nitro­phenol acts as a hydrogen‐bond acceptor and HMT acts as a hydrogen‐bond donor.

The short carbonyl bond in the title compound, [Cu2(C7H4­NO3S)4(C3H4N2)4] [Liu, Huang, Li & Lin (1991). Acta Cryst. C47, 41–43], is an artifact of disorder in the iso­thia­zol‐3(2H)‐one 1,1‐dioxide part of the 1,2‐benziso­thia­zol‐3(2H)‐one entity. In the present redetermination, all bond dimensions in the centrosymmetric dinuclear mol­ecule are normal. The five‐coordinate Cu atom shows trigonal–bipyramidal coordination. Hydro­gen bonds from the imidazole donor ligand link adjacent mol­ecules into a two‐dimensional layer structure.

10‐(4‐Fluoro­phenyl)‐3,3,6,6,9‐penta­methyl‐3,4,6,7,9,10‐hexa­hydro­acridine‐1,8(2H,5H)‐dione, C24H28FNO2, (I), crystallizes with two crystallographically independent mol­ecules (which differ slightly in conformation), while 10‐(4‐fluoro­phenyl)‐9‐propyl‐3,3,6,6‐tetra­methyl‐3,4,6,7,9,10‐hexa­hydro­acridine‐1,8(2H,5H)‐dione, C26H32FNO2, (II), crystallizes with one mol­ecule per asymmetric unit. In both structures, the central ring in the acridine moiety is in a sofa conformation, while the outer rings adopt intermediate half‐chair/sofa conformations. The central pyridine ring is orthogonal to the substituted phenyl ring. In both structures, the packing of the crystal is stabilized by C—H⋯O intermolecular hydrogen bonds.

The title compounds, 10‐benzoyl­amino‐1,2,3,4,5,6,7,8,9,10‐deca­hydroacridine‐1,8‐dione monohydrate, C20H20N2O3·H2O, and 10‐p‐toluoylamino‐1,2,3,4,5,6,7,8,9,10‐deca­hydroacridine‐1,8‐dione monohydrate, C21H22N2O3·H2O, consist of partially hydrogenated acridine moieties with one benzoyl­amino substituent on the central ring. The acridine moiety suffers considerable deviations from planarity. The central ring in the acridine moiety is a boat, while the outer rings adopt sofa conformations.

In the title compound, [UO2(C15H11O2)2(C14H14OS)], the UVIatom is coordinated by seven O atoms in a distorted pentagonal–bipyramidal geometry. Both di­phenyl­propane‐1,3‐dionate systems are nearly planar. The sulfoxide moiety is in a distorted tetrahedral geometry, while its two aromatic rings are nearly orthogonal to one another. The crystal packing is stabilized by two bifurcated hydrogen‐bonding interactions involving both uranyl O atoms.

The crystal of the title compound, C20H17NO4, which was used for collecting intensity data was twinned. Each of the two crystallographically independent mol­ecules in the asymmetric unit has a planar indole moiety perpendicular to a planar oxo­propyl moiety. The distribution of the bonds at the central C atom joining the oxo­propyl, phenyl and indole substituents is also planar. The packing is stabilized by intermolecular C—H⋯O interactions, as well as by dipole–dipole and van der Waals interactions.

In the title compound, [Fe(C34H29O2P2)]2[Sb2Cl8], the discrete centrosymmetric [Sb2Cl8]2−anions are formed from two edge‐shared square pyramids of Cl atoms about each Sb atom. Within the cation, the two di­phenyl­phosphinate groups share one H atom and the ferrocene cyclo­penta­dienyl rings are in a staggered conformation, with the average value of the twist angle being 46°. In the crystal, each [Sb2Cl8]2−anion is involved in eight C—H⋯Cl interactions with four surrounding cations and these interactions interconnect the ions to form molecular columns along the adirection.

In the title compound, [Fe(C17H14P)2]2[Sb4Cl16]·C2H6O, the Fe atoms lie on inversion centres and the pairs of cyclopentadienyl rings are consequently in a fully staggered conformation. The centrosymmetric anionic clusters formed by [Sb4Cl16]4−are surrounded by the cations and are held together by weak C—H⋯Cl interactions. These formations stack along the aaxis to form columns, and the columns are interconnected by another weak C—H⋯Cl interaction along the baxis.

In the title 1/2/2 adduct, C4H12N22+·2C6H3N2O5−·2H2O, the dication lies on a crystallographic inversion centre and the asymmetric unit also has one anion and one water mol­ecule in general positions. The 2,4‐di­nitro­phenolate anions and the water mol­ecules are linked by two O—H⋯O and two C—H⋯O hydrogen bonds to form molecular ribbons, which extend along the bdirection. The piperazine dication acts as a donor for bifurcated N—H⋯O hydrogen bonds with the phenolate O atom and with the O atom of the o‐nitro group. Six symmetry‐related molecular ribbons are linked to a piperazine dication by N—H⋯O and C—H⋯O hydrogen bonds.

Chalcones (α,β‐unsaturated ketones) are effective antitumour agents. It has been proved that having halogen or methoxy groups substituted in various positions of the phenyl ring enhances the activity of chalcones many times. The title compounds, C21H20O5and C19H15BrO3, respectively, were chosen for crystallographic study in order to determine their structures and conformations. In both compounds, the keto group is in the s‐cisconformation and is almost planar. There are weak intramolecular interactions in both structures.

In the title complex, C6H12N4·C8H8O3, the hexa­methyl­ene­tetramine mol­ecule accepts a single intermolecular O—H⋯N hydrogen bond from the hydroxy group of the 4‐hydroxy‐3‐methoxy­benz­aldehyde moiety. The non‐centrosymmetric crystal structure is built from alternating molecular sheets of 4‐hydroxy‐3‐methoxy­benz­aldehyde and hexa­methyl­ene­tetramine mol­ecules, and is stabilized by intermolecular O—H⋯N, C—H⋯O and C—H⋯π interactions.

In the title compound, [Zn(CH3COO)2(C4H8N2S)2]·H2O, the Zn atom is tetrahedrally coordinated in the ZnO2S2form. N—H⋯O and O—H⋯O intramolecular and intermolecular hydrogen bonds are formed by the four N atoms and the water mol­ecule. N—H⋯O intermolecular hydrogen bonds and C—H⋯S and C—H⋯O intermolecular interactions interconnect columns formed by the mol­ecules into layers. Adjacent layers are then linked by other N—H⋯O and O—H⋯O intermolecular hydrogen bonds to form a three‐dimensional framework throughout the structure. The orientations of the acetate planes are such that the Zn atom lies within them.

The title compound, bis(2,4‐dinitrophenolato‐κ2O,O′)(1,4,7,10,13,16‐hexaoxadecane‐κ6O)barium(II), [Ba(C6H3N2O5)2(C12H24O6)], is a 1:1 complex of barium(II)–2,4‐di­nitro­phenolate and 1,4,7,10,13,16‐hexaoxa­cyclo­octa­decane (18‐crown‐6). Its structure is located on a crystallographic inversion centre. The temperature dependence of the crystal structure has been studied. The monoclinic β angle of the P21/­nspace group increases with increasing temperature. The packing structure of the complex is stabilized by intermolecular C—H⋯O interactions.

In the title compound, C25H19NO4, the indole moiety is not completely planar, the heterocyclic ring being distorted very slightly towards a half‐chair conformation. The benzoyl and 4‐­methoxy­phenyl substituents are individually almost planar and are in a bisecting and nearly perpendicular configuration, respectively, with respect to the plane of the indole moiety. The molecular and packing structures in the crystal are stabilized by intramolecular and intermolecular C—H⋯O interactions.

The title dinuclear di‐μ‐oxo‐bis­[(1,4,8,11‐tetra­aza­cyclo­tetra­decane‐κ4N)­manganese(III,IV)] diperchlorate nitrate complex, [Mn2O2(C10H24N4)2](ClO4)2(NO3) or [(cyclam)Mn­O]2(ClO4)2(NO3), was self‐assembled by the reaction of Mn2+with 1,4,8,11‐tetra­aza­cyclo­tetra­decane in aqueous media. The structure of this compound consists of a centrosymmetric binuclear [(cyclam)MnO]3+unit, two perchlorate anions and one nitrate anion. While the low‐temperature electron paramagnetic resonance spectra show a typical 16‐line signal for a di‐μ‐oxo MnIII/MnIVdimer, the magnetic susceptibility studies also confirm a characteristic antiferromagnetic coupling between the electronic spins of the MnIVand MnIIIions.

In the title compounds, C17H15N3and C20H22N4, the methyl derivative crystallizes with two mol­ecules in the asymmetric unit, while the N,N‐diethyl­amino derivative crystallizes with one mol­ecule per asymmetric unit. The bi­phenyl twist angle for both mol­ecular structures is approximately 45°. The molecular packing is stabilized by N—H⃛N hydrogen bonds.

The crystal structures of tris(2‐methyl­quinolin‐8‐olato‐N,O)­iron(III), [Fe­(C10­H8­NO)3], (I), and aqua­bis(2‐methyl­quinolin‐8‐olato‐N,O)­copper(II), [Cu­(C10­H8NO)2­(H2O)], (II), have been determined. Compound (I) has a distorted octahedral configuration, in which the central Fe atom is coordinated by three N atoms and three O atoms from three 2‐methylquinolin‐8‐olate ligands. The three Fe—O bond distances are in the range 1.934 (2)–1.947 (2) Å, while the three Fe—N bond distances range from 2.204 (2) to 2.405 (2) Å. In compound (II), the central CuIIatom and H2O group lie on the crystallographic twofold axis and the coordination geometry of the CuIIatom is close to trigonal bipyramidal, with the three O atoms in the basal plane and the two N atoms in apical positions. The Cu—N bond length is 2.018 (5) Å. The Cu—O bond length in the basal positions is 1.991 (4) Å, while the Cu—O bond length in the apical position is 2.273 (6) Å. There is an intermolecular OW—H⃛O hydrogen bond which links the mol­ecules into a linear chain along the baxis.

In both the title structures, O‐ethyl N‐(2,3,4,6‐tetra‐O‐acetyl‐β‐d‐gluco­pyran­osyl)­thio­carbam­ate, C17H25NO10S, and O‐methyl N‐(2,3,4,6‐tetra‐O‐acetyl‐β‐d‐gluco­pyran­osyl)­thiocar­bam­ate, C16H23NO10S, the hexo­pyran­osyl ring adopts the 4C1conformation. All the ring substituents are in equatorial positions. The acetoxy­methyl group is in a gauche–gaucheconformation. The S atom is in a synperi­planar conformation, while the C—N—C—O linkage is antiperiplanar. N—H⃛O intermolecular hydrogen bonds link the mol­ecules into infinite chains and these are connected by C—H⃛O interactions.

In the title compound, 2‐[(methylphenylamino)methyl]‐1‐(phenylsulfonyl)indole, C22H20N2O2S, the indole system is not strictly planar and the dihedral angle between the fused rings is 2.7 (1)°. The angles around the S atom of the sulfonyl substituent deviate significantly from the ideal value for tetrahedral geometry. The pyramidalization at the indole N atom is very small. Of the two C—H⃛O interactions, one influences the orientation of indole with respect to the sulfonyl group and the other determines the orientation of the phenyl bound to sulfonyl. The phenyl ring of the sulfonyl substituent makes a dihedral angle of 89.6 (1)° with the best plane of the indole. The molecular packing is stabilized by C—H⃛π and C—H⃛O hydrogen bonds.

The tetradentate N2S2Schiff base ligand 3,3′‐[2,2′‐(ethyl­ene­di­oxy)di­benzyl­idene]­bis­(S‐methyl di­thio­car­ba­zate) (H2L), prepared by the condensation of S‐methyl di­thio­carb­aza­te with 1,4‐bis(2‐formyl­phenyl)‐1,4‐dioxa­butane in a 1:2 molar ratio, reacts with nickel acetate to form the title neutral metal complex, [Ni(C20H20N4O2S4)]. The X‐ray structure of the complex shows a distorted square‐planar geometry around the Ni atom. The monomeric units are weakly associated into dimers viaa long Ni⃛S interaction [3.569 (1) Å]. These dimeric units are then linked by C—H⃛S intermolecular contacts to form a polymeric chain along the aaxis.

The two title compounds, [M(C6H14O2PS2)2(C12H8N2)], where M= CdIIand FeII, are isomorphous. Each compound has a crystallographic twofold axis of symmetry through the metal atom and the 1,10‐phenanthroline mol­ecule. The central metal atom is coordinated to four S atoms from the two dithiophos­phate groups and two N atoms from the 1,10‐phenanthroline ligand. The environment of the metal atom is a distorted octahedron.

The title compound, C10H9NO2Se, crystallizes as flat mol­ecules linked by selenium–oxy­gen interactions [Se⃛O = 3.189 (4) Å] into a linear chain along the aaxis of the triclinic cell. The bond dimensions that are derived from ab initiogeometry optimization calculations are similar to those determined from the diffraction measurements.

catena‐Poly­[di­cyclo­hexyl­ammonium [tri­butyl­tin‐μ‐(4‐oxo‐4H‐pyran‐2,6‐di­carboxyl­ato‐O2:O6)]], (C12­H24N)­[Sn(C7­H2­O6)(C4H9)3], consists of 4‐oxo‐4H‐pyran‐2,6‐di­carboxyl­ato groups that axially link adjacent tri­butyl­tin units into a linear polyanionic chain. The ammonium counter‐ions surround the chain, and each cation forms a pair of hydrogen bonds to the double‐bond carbonyl O atoms of the same dianionic group. The chain propagates in a zigzag manner along the caxis of the monoclinic cell. In catena‐poly­[methyl­(phenyl)­ammonium [tri­butyl­tin‐μ‐(pyridine‐2,6‐di­carboxyl­ato‐O2:O6)]], (C7H10N)­[Sn(C7H3NO4)­(C4H9)3], the pyridine‐2,6‐di­carboxyl­ato groups also link the tri­butyl­tin groups into a chain, but the hydrogen‐bonded chain propagates linearly on the acface of the monoclinic cell.

The monoclinic cell of di­cyclo­hexyl­ammonium 2,4‐di­chloro­phenoxy­acetate contains four C12H24N+·C5H8Cl2O3−ion pairs. The ammonium N atom is hydrogen bonded to the oxy­gen ends of two carboxyl groups to form a 12‐membered O—C—O⋯HNH⋯O—C—O⋯HNH ring. In (2,4‐di­chloro­phenoxy­lacetato)­bis­(tri­phenyl­phosphine)silver(I), [Ag(C8H5Cl2O3)(C18H15P)2], the carboxyl CO2unit chelates to the Ag atom in an anisobidentate manner [Ag—O = 2.436 (2) and 2.517 (2) Å]; the Ag atom shows distorted tetrahedral geometry.

In the title compound, C18H13BrClNO3, the heterocyclic ring of the indole is distorted from planarity towards an envelope conformation. The orientations of the indole, oxetane, chloro and bromo­phenyl substituents are conditioned by the sp3states of the spiro‐junction and the Cl‐attached C atoms.

In the structure of the title compound, [CuII­(en)2][(EtO)2P(S)S]2(en is ethyl­ene­di­amine) or [Cu(C2H8N2)2](C4H10O2PS2)2, the Cu atom lies on a center of inversion and is coordinated in a slightly distorted square coordination geometry by four N atoms from two ethyl­enedi­amine mol­ecules. The diethyl di­thio­phosphate moieties, (EtO)2P(S)S−, act as counter‐anions.

In the title compound, [SbCl2(C4H8N2S)2]Cl, the coordination around the Sb atom can be described as distorted pseudo‐octahedral. Both rings of the tri­methyl­ene­thio­urea ligands [alternatively 3,4,5,6‐tetrahydropyrimidine‐2(1H)‐thione] adopt an envel­ope conformation. The mol­ecules are connected into dimers in the abplane by two intermolecular hydrogen bonds. The dimers are arranged into infinite one‐dimensional chains along the aaxis as a result of the Cl−ions forming intermolecular hydrogen bonds with three NH groups.

In the title compound, C26H22O4, the pyran­one ring adopts a twisted boat conformation, while the cyclo­hexane ring is close to an envelope conformation. The dihedral angle between the mean planes of the coumarin and naphthalene systems is 78.8 (1)°. The attached phenyl ring is in an equatorial position with respect to the cyclo­hexane ring.

In the title complex, the 1:1 ionic adduct of hexa­methyl­enetetraminium and 2,4,6‐tri­nitro­phenolate, C6H13N4+·­C6H2N3O7−, the cation acts as a donor for bifurcated hydrogen bonds to the O atoms of the phenolate and one of the nitro groups of the 2,4,6‐tri­nitro­phenolate anion. The crystal structure is built from sheets of cations and anions, and is stabilized by intermolecular C—H⋯O and C—H⋯π interactions.

In the title compound, [Fe(C5H5)(C16H12N3OS)], the 8‐am­inoquinoline and acyl­thio­urea moieties are almost planar. There are two perpendicular arrangements of the mol­ecules in the crystal with slightly different conformations. The two cyclo­penta­dienyl rings in each mol­ecule are parallel and eclipsed.

In the title compound, C20H16N2O5, both of the 1‐acetyl­isatin (1‐acetyl‐1H‐indole‐2,3‐dione) moieties are planar and form a dihedral angle of 74.1 (1)°. Weak intermolecular hydrogen bonds and C—H⋯π interactions stabilize the packing in the crystal.

In the title compound, C20H20FNO5S, the pyrrolidine ring adopts an envelope conformation. The fluoro­phenyl and thio­phene rings are individually planar. The molecular and crystal structures are stabilized by intra‐ and intermolecular C—H⋯O interactions.

The mol­ecule of the title compound, methyl 1‐formyl‐6‐oxa‐6H‐indene‐4‐carboxyl­ate, C11H8O4, is planar. There are weak C—H⋯O intramolecular interactions and an intermolecular hydrogen bond in the structure, and these influence the crystal packing.

In the title compound, C16H19ClN2O4, the pyridine ring is nearly planar, the piperidine ring is non‐planar and the cyclo­hexane ring adopts a screw‐boat conformation. The carboxyl­ate group makes a dihedral angle of 80.9 (2)° with the least‐squares plane through the cyclo­hexane ring.

The title compound, C19H16O, crystallizes with two mol­ecules of opposite chirality in the asymmetric unit. In both mol­ecules, the naphthalene and cyclo­pentanone moieties are individually planar. The two cyclo­pentane rings adopt envelope conformations, while the cyclo­hexane ring adopts a boat conformation.

In the title compound, C24H18ClNO2, the phenyl ring and the tetralone moiety are approximately orthogonal to the isoxazoline ring. The isoxazoline ring adopts an envelope conformation, while the cyclo­hexenone ring of the tetralone moiety has an intermediate sofa/half‐chair conformation. In this structure, one C—H⋯N intermolecular and two C—H⋯O intramolecular hydrogen bonds occur; the H⋯Adistances are 2.60, and 2.35 and 2.57 Å, respectively. The mol­ecules are held together by an intermolecular C—H⋯N hydrogen bond, forming a one‐dimensional chain along the [100] direction.

The title coordination complex, [Ni(C14H14O2PS2)2(C12H8N2)] or [Ni(pMePh‐dtp)2(phen)] (phen is 1,10‐phenanthroline; dtp is di­aryl­di­thio­phosphate), has a non‐crystallographic twofold axis of symmetry through the Ni atom and the phen moiety. Two O,O‐di‐p‐tolyl­di­thio­phosphate (dtp) ions act as bidentate ligands. The central metal atom is coordinated by four S atoms from two dtp groups and two N atoms from the phen ligand. The title compound displays distorted octahedral geometry around the central Ni atom.

In the title compound, C29H30N6O, the naphthyridine moiety is planar with a dihedral angle between the fused rings of 1.9 (1)°. The phenol ring is nearly coplanar, while the diethyl­amino­phenyl substituent is orthogonal to the central naphthyridine ring and the pyrrolidine ring makes an angle of 11.2 (1)° with it. The O atom of the hydroxy substituent is coplanar with the phenyl ring to which it is attached. The molecular structure is stabilized by a C—H⃛N‐type intramolecular hydrogen bond and the packing is stabilized by intermolecular C—H⃛π, O—H⃛N and N—H⃛O hydrogen bonds.

In the title coordination polymer, [Pb(NCS)2(C12H12N2)], the coordination geometry about the PbIIatom is a distorted octahedron, composed of two N atoms from bpe ligands [bpe is 1,2‐bis(4‐pyridyl)ethane], two other N atoms from NCS−groups and two neighbouring S atoms through short contacts. The trans‐bpe ligands act as bridges between two PbIIcentres resulting in the formation of a linear chain. The terminal S atoms of the NCS−ligands make short contacts with the PbIIatom of neighbouring chains to form an infinite two‐dimensional polymeric structure.

The triclinic cell of the title compound contains 2C12H24N+·2C6H5O2S−ion pairs that are linked by four hydrogen bonds [N⃛O = 2.728 (3) and 2.758 (3) Å] across a centre of inversion.

The title compound, a novel 30‐membered 2:2 macrocyclic thio­carbohydrazone, C34H32N8O4S2·3C5H5N, has been pre­pared and crystallographically characterized. The mol­ecule of the compound is twisted. One dioxa­butane group is boat‐like in shape, whereas the other is highly disordered. The crystal structure is stabilized by inter‐ and intramolecular hydrogen bonds.

In the title compound, C14H10N2O2·2H2O, the water mol­ecules are involved in hydrogen bonds and interactions. Intermolecular and intramolecular O—H⃛O hydrogen bonds connect the complex into chains along the aaxis, whereas N—H⃛O intermolecular hydrogen bonds and C—H⃛O interactions interconnect these layers forming a three‐dimensional network.

In the title compound, [Ni(C6H14O2PS2)2(C5H6N2)2], the coordination around the Ni atom, which lies on a crystallographic centre of symmetry, is octahedral with the S atoms from the di­thio­phosphate ligands occupying the equatorial positions, while the axial positions are occupied by the ring N atoms of the 2‐amino­pyridine ligands. The mol­ecules form layers in the bcplane which are stacked in the direction of the aaxis.

In the title compound, [ZnCl2(C14H12N2)2], the environment around the Zn atom is distorted tetrahedral formed by two Cl atoms and two tertiary N atoms of the 2‐benzyl‐1H‐benz­imidazole ligands. N—H⃛Cl intermolecular hydrogen bonds link the mol­ecules into infinite chains in the [101] direction.

A donor–acceptor compound, di­aqua‐1κO,2κO‐[μ‐11,23‐dimethyl‐3,7,15,19‐tetra­aza­tri­cyclo­[19.3.1.19,13]hexacosa‐1(25),2,7,9,11,13(26),14,19,21,23‐decaene‐25,­26‐diolato‐1κ4N3,N7,O25,O26:­2κ4N15,N19,O25,O26]­dizinc(II) diperchlorate bis(8‐methyl­quinoline) ethanol disolvate, [Zn2(C24H26N4O2)(H2O)2](ClO4)2·2C10H9N·2C2H6O, obtained by the reaction of a dinuclear zinc(II) complex of a Robson macrocycle (acceptor) and 8‐methyl­quinoline (donor), lies about an inversion centre and the coordination about the unique Zn atom is a distorted square pyramid. The fifth coordination site is occupied by the water mol­ecule, Zn—O = 2.016 (2) Å, and the average macrocyclic Zn—O and Zn—N distances are 2.059 (6) and 2.059 (3) Å, respectively.

In the title complex, [Ni(Im)6](iPr‐dtp)2or [Ni(C3H4N2)6](C6H14O2PS2)2, the coordination around the Ni atom, located on an inversion centre, is octhahedral with all positions being occupied by tertiary N atoms of the imidazole moieties. Hydro­gen bonds link the anions and cations into a two‐dimensional network in the bcplane.

In the title complex, [UO2(dbm)2(PhSOPh)] or [UO2(C15H11O2)(C12H10OS)], where dbm is 1,3‐di­phenyl­propane‐1,3‐dionate, the U atom is surrounded by seven O atoms to give a distorted pentagonal bipyramidal geometry. The U—Ouranyland U—Odbmdistances (dbm is 1,3‐di­phenyl­propane‐1,3‐dionate) are in the ranges 1.760 (6)–1.776 (5) and 2.308 (4)–2.417 (4) Å, respectively, while the U—Osulfoxidedistance is 2.427 (4) Å.

In the title compound, C19H20O8, the benzene rings are nearly perpendicular to each other [dihedral angle 80.2 (2)°]. The carboxy group is twisted out while both the methoxy and acetyl groups are almost coplanar with their attached benzene rings. The hydroxy group is involved in an intramolecular O—H⃛O hydrogen bond with the acetyl O atom and the compound is connected through an intermolecular O—H⃛O contact to form a dimer. The crystal structure is stabilized by intermolecular O—H⃛O hydrogen bonds.

The title compound, [Ni(C21H15N2S2)2], has a novel cisconfiguration with two fluorene moieties on the same side. The Ni atom is in a square‐planar configuration. The molecular packing is stabilized by intramolecular stacking between the fluorene moieties and extensive C—H⃛π interactions.