Bis(formato-κO)bis­[1-(pyridin-2-yl)ethanone oxime-κ²N,N′]nickel(II)

In the title compound, [Ni(HCOO)₂(C₇H₈N₂O)₂], the Ni atom is six-coordinated by four N atoms from two oxime ligands and by two O atoms from two formate ions in a distorted octa­hedral geometry, with the oxime-N atoms mutually trans. The mol­ecular conformation is stabilized by intra­molecular O—H...O hydrogen bonds.

(5S)-5-Methyl-3-phenyl-2-sulfanyl­idene-1,3-thia­zolidin-4-one

In the title mol­ecule, C₁₀H₉NOS₂, the 2-sulfanyl­idene­thia­zolidin-4-one mean plane and phenyl ring form a dihedral angle of 81.7 (1)°. In the crystal, C—H...π inter­actions link mol­ecules into helical chains in [010].

Bis(4-fluoro­benz­yl)bis­(4-phenyl-5-sulfanyl­idene-4,5-dihydro-1,3,4-thio­diazole-2-thiol­ato)tin(IV)

In the title complex, [Sn(C₇H₆F)₂(C₈H₅N₂S₃)₂], including the weak Sn-N inter­actions, the Sn^IV atom is situated in a distorted trans-octa­hedral geometry, and the equatorial plane is defined by two chelating 4-phenyl-5-sulfanyl­idene-4,5-dihydro-1,3,4-thio­diazole-2-thiol­ate ligands. The apical positions are occupied by two C atoms of 4-fluoro­benzyl groups.

Ethyl 2-diethyl­amino-4-oxo-3,5-diphenyl-4,5-dihydro-3H-pyrrolo­[3,2-d]pyrimidine-7-carboxyl­ate

In the title compound, C₂₅H₂₆N₄O₃, the two fused pyrrolo­[3,2-d]pyrimidine rings form a dihedral angle of 3.7 (2)°. The two substituent phenyl rings are twisted with respect to the pyrrole and pyrimidine rings, making dihedral angles of 57.2 (2) and 69.0 (2)°, respectively. The ethyl and eth­oxy groups are disordered over two positions; the site occupancies are 0.53 (1) and 0.47 (1) for ethyl, and 0.63 (1) and 0.37 (1) for eth­oxy. The crystal packing features C—H...O hydrogen bonds.

4-{2-[4-(Dimethyl­amino)­phen­yl]ethen­yl}-1-methyl­pyridinium 3,5-dicarb­oxy­benzene­sulfonate methanol monosolvate

In the crystal structure of the title solvated salt, C₁₆H₁₉N₂⁺·C₈H₅O₇S⁻·CH₃OH, the anions and the methanol solvent mol­ecules are linked by O—H...O hydrogen bonds. The cations and anions are packed as alternate layers parallel to (11). The crystal structure is further stabilized by a π–π inter­action between the pyridinium and benzene rings of the cations, with a centroid–centroid distance of 3.5492 (4) Å.

Bis[μ-N-(3-meth­oxy-2-oxidobenzyl­idene-1:2κ²O²:O²)-L-isoleucinato-2κ²N,O]bis­(1,10-phenanthroline-1κ²N,N′)dinickel(II) methanol tetra­solvate trihydrate

In the title complex, [Ni₂(C₁₄H₁₇NO₄)₂(C₁₂H₈N₂)₂]·4CH₃OH·3H₂O, the two Ni^II ions are bridged by two Schiff base anions, leading to a dinuclear complex. One Ni^II ion is six-coordinated by four O atoms and two N atoms of two tridentate Schiff base ligands derived from the condensation of L-isoleucine and o-vanillin. The other Ni^II ion is six-coordinated by four N atoms of two 1,10-phenanthroline ligands and two O atoms of the Schiff base ligands. In the crystal, inter­molecular O—H...O and C—H...O hydrogen bonds lead to a three-dimensional structure. Intra­molecular C—H...O hydrogen bonds are also present. One of the methyl groups of the L-isoleucinate moieties is disordered over two sets of sites with an occupancy ratio of 0.687 (19):0.313 (19) and two methanol mol­ecules are half-occupied.

4-{2-[4-(Dimethyl­amino)­phen­yl]ethen­yl}-1-methyl­pyridinium 2-amino-3,5-dimethyl­benzene­sulfonate monohydrate

In the crystal structure of the title compound, C₁₆H₁₉N₂⁺·C₈H₁₀NO₃S⁻·H₂O, the cations and anions are linked by O—H...O and N—H...O hydrogen bonds, forming alternating layers parallel to the ac plane. An intra­molecular N—H...O hydrogen bond occurs in the anion. The crystal structure is further stabilized by π–π inter­actions, with centroid–centroid distances of 3.7240 (9) and 3.6803 (8) Å.

Dichlorido(ethanol-κO)[2-(1,3-thia­zol-4-yl-κN)-1H-benzimidazole-κN³]copper(II)

In the title complex, [CuCl₂(C₁₀H₇N₃S)(C₂H₅OH)], the Cu^II ion is five-coordinated in a distorted square-pyramidal geometry by two N atoms from a 2-(1,3-thia­zol-4-yl)-1H-benzimidazole ligand, one O atom from an ethanol mol­ecule and two Cl atoms. In the crystal, O—H...Cl and N—H...Cl hydrogen bonds link the complex mol­ecules into a layer parallel to (100). π–π inter­actions between the thia­zole rings are observed [centroid–centroid distance = 3.749 (3) Å].

Bis{μ-2-[3-carboxyl­atometh­yl-4-(phenyl­sulfan­yl)phen­yl]propano­ato-κ⁴O,O′:O′′,O′′′}bis­[(2,2′-bipyridine-κ²N,N′)cadmium]

In the title complex, [Cd₂(C₁₇H₁₄O₄S)₂(C₁₀H₈N₂)₂], which was hydro­thermally synthesized, the Cd^II cation is hexa­coordinated in a distorted octa­hedral geometry by two N atoms from a 2,2′-bipyridine ligand and by four O atoms from two different 2-[3-carboxyl­atometh­yl-4-(phenyl­sulfan­yl)phen­yl]propano­ate ligands, forming a cyclic dimetallic complex.

Bis(μ-2-{bis­[(2-oxidobenzyl­idene)amino]­meth­yl}phenolato)bis­[(tetra­hydro­furan)­samarium(III)] tetra­hydro­furan disolvate

In the centrosymmetric binuclear complex of the title solvate, [Sm₂(C₂₁H₁₅N₂O₃)₂(C₄H₈O)₂]·2C₄H₈O, the Sm^III is coordin­ated in a distorted monocapped octa­hedral geometry by four O atoms and two N atoms from two tridentate deprotonated 2-{bis­[(2-oxidobenzyl­idene)amino]­meth­yl}phenolate ligands and an O atom of a tetra­hydro­furan (THF) mol­ecule. The Sm...Sm distance in the complex is 3.8057 (4) Å. Parts of the coordinating THF mol­ecule are disordered over two sets of sites in a 0.56 (3):0.44 (3) ratio. The complex and solvent mol­ecules are linked into a three-dimensional structure via C—H...O hydrogen-bonding inter­actions.

(Methanol-κO)(methano­lato-κO)oxido[N-(2-oxidobenzyl­idene)isoleucinato-κ³O,N,O′]vanadium(V)

In the title complex, [V(C₁₃H₁₅NO₃)O(CH₃O)(CH₃OH)], the V^V atom is six-coordinated by a tridentate O,N,O′-donor ligand, derived from the condensation of salicyl­aldehyde and L-isoleucine, a vanadyl O atom, a methano­late O atom and a methanol O atom in a distorted octa­hedral geometry. The asymmetric unit contains two complex mol­ecules. In the crystal, inter­molecular O—H...O and C—H...O hydrogen bonds connect the mol­ecules into a one-dimensional chain along [100].

4-{2-[4-(Dimethyl­amino)­phen­yl]ethen­yl}-1-methyl­pyridinium 4-nitro­benzene­sulfonate

The asymmetric unit of the title salt, C₁₆H₁₉N₂⁺. C₆H₄NO₅S⁻, consists of two cations and two anions. The crystal structure is stabilized by π–π inter­actions between the pyridyl and phenyl rings of the cations, with a centroid–centroid distance of 3.7323 (6) Å.

Bis[μ-N′-(5-bromo-3-meth­oxy-2-oxido­benzyl­idene)-2-hydroxybenzohydra­zidato]bis[(N,N-dimethyl­formamide)­copper(II)]

The title compound, [Cu₂(C₁₅H₁₁BrN₂O₄)₂(C₃H₇NO)₂], is derived from the reaction of N′-(5-bromo-2-hy­droxy-3-meth­oxy­benzyl­idene)-2-hy­droxy­benzohydrazide and copper nitrate in a dimethyl­formamide solution in the presence of sodium hydroxide. The compound can be regarded as a binuclear centrosymmetric complex. In the crystal, the Cu^II atom is fivefold surrounded and adopts a distorted square-pyramidal coordination environment. An intra­molecular O—H...N hydrogen bond stabilizes the mol­ecular conformation.

3,3′-(1,4-Phenyl­ene)bis­[2-(propyl­amino)­benzofuro[3,2-d]pyrimidin-4(3H)-one] ethanol disolvate

The title compound, C₃₂H₂₈N₆O₄·2C₂H₅OH, consists of two 2-(propyl­amino)­benzofuro[3,2-d]pyrimidin-4(3H)-one units connected, via one of the pyrimidine N atoms, to a bridging benzene ring in the 1,4 positions. Two ethanol solvent mol­ecules are also present. The main mol­ecule lies on a center of symmetry located at the center of the benzene ring. The fused-ring system of the benzofuro[3,2-d]pyrimidine moiety is nearly planar (r.m.s. deviation = 0.016 Å) and forms a dihedral angle of 78.21 (7)° with the central benzene ring. The crystal structure features O—H...O and N—H...O inter­actions. The C atoms of the propyl­amino side chain in the main mol­ecule and the ethyl group in the solvent mol­ecule are disordered over two positions, with site-occupancy factors 0.34:0.66 and 0.42:0.58, respectively.

μ-Oxalato-κ⁴O¹,O²:O^1′,O^2′-bis­[aqua­(2,2′-bipyridine-κN)(nitrato-κ²O,O′)lead(II)]

The title compound, [Pb₂(C₂O₄)(NO₃)₂(C₁₀H₈N₂)₂(H₂O)₂], was synthesized hydro­thermally. The binuclear complex mol­ecule is centrosymmetric, the inversion centre being located at the mid-point of the oxalate C—C bond. The Pb^II ion is hepta­coordinated by the O atom of one water mol­ecule, two oxalate O atoms, two nitrate O atoms and two 2,2′-bipyridine N atoms, forming an irregular coordination environemnt. Inter­molecular O—H...O hydrogen bonds between water mol­ecules and oxalate and nitrate ions result in the formation of layers parallel to (010). π–π inter­actions between pyridine rings in adjacent layers, with centroid–centroid distances of 3.584 (2) Å, stabilize the structural set-up.

(E)-1-(5-Bromo-2-hy­droxy­phen­yl)-3-[4-(dimethyl­amino)­phen­yl]prop-2-en-1-one

In the title compound, C₁₇H₁₆BrNO₂, the two benzene rings make a dihedral angle of 7.4 (3)°; the hy­droxy group links to the carbonyl group via an intra­molecular O—H...O hydrogen bond. In the crystal, weak C—H...O inter­actions link the mol­ecules into a supra­molecular chain running along the c axis.

(E)-N′-(5-Bromo-2-hy­droxy-3-meth­oxy­benzyl­idene)-2-hy­droxy­benzohydrazide monohydrate

The organic molecule of the title hydrate, C₁₅H₁₃BrN₂O₄·H₂O, is roughly planar, with a mean deviation of 0.0939 (2) Å. The dihedral angle between the two aromatic rings is 8.2 (3)°. Intra­molecular O—H...N and O—H...O hydrogen bonds are observed. In the crystal, N—H...O(water) and O(water)—H...O hydrogen bonds lead to a three-dimensional network.

4,4′,6,6′-Tetra-tert-butyl-2,2′-[1,3-diazinane-1,3-diylbis(methyl­ene)]diphenol 0.25-hydrate

The title compound, C₃₄H₅₄N₂O₂·0.25H₂O, the organic mol­ecule, a potential tetra­dentate ligand with a bulky phenolic donor, has overall mirror symmetry. A partially occupied water mol­ecule of solvation is present in the lattice. The six-membered 1,3-diazinane ring displays a chair conformation. An intra­molecular O—H...N hydrogen bond ocurs. In the crystal, mol­ecules are linked by O—H...O inter­actions.

3-(5-Oxo-3-phenyl-4,5-dihydro-1H-pyrazol-1-yl)benzonitrile

In the title compound, C₁₆H₁₁N₃O, the dihedral angles between the 3-cyano­benzene and benzene planes and the 1H-pyrazol-5(4H)-one plane are 4.97 (9) and 9.91 (9)°, respectively.

N-[1-(1H-Pyrrol-2-yl)ethyl­idene]aniline

There are two independent mol­ecules in the asymmetric unit of the title compound, C₁₂H₁₂N₂, in which the pyrrole and benzene rings form dihedral angles of 72.37 (7) and 82.34 (8)°. The imino N—C bond lengths in the two mol­ecules are equal [1.286 (2) Å] and indicate C=N character. In the crystal, each mol­ecule forms a dimer with an inversion-related mol­ecule through a pair of classical N—H...N hydrogen bonds.

2,4,6-Trimethyl-N-[1-(1H-pyrrol-2-yl)ethyl­idene]aniline

There are two independent mol­ecules in the asymmetric unit of the title compound, C₁₅H₁₈N₂, each of which features a syn disposition of the N atoms. In each mol­ecule, the pyrrole and benzene rings are essentially perpendicular, with dihedral angles of 78.90 (9) and 79.96 (9)°. In the crystal, the independent mol­ecules are connected by a pair of pyrrole–imino N—H...N hydrogen bonds, forming a two-mol­ecule aggregate.