N-Hy­droxy­pyridine-4-carboxamide

The title compound, C6H6N2O2, is approximately planar with an r.m.s. deviation for the non-H atoms of 0.052 Å. In the crystal, a two-dimensional array in the bc plane is stabilized by O—H⋯N and N—H⋯O hydrogen bonds

catena-Poly[[trimethyl­tin(IV)]-μ-3,5-difluoro­benzoato-κ2 O:O′]

In the title compound, [Sn(CH3)3(C7H3F2O2)]n, the central Sn atom is coordinated by two O atoms from the anion and three methyl C atoms in a polymeric fashion owing to the presence of bidentate bridging carboxyl­ate ligands. The five-coordinate Sn atom exists in a distorted trigonal–bipyramidal geometry with the mol­ecules connected by weak C—H⋯F inter­moleclar inter­actions, forming supra­molecular chains parallel to [010]

3-Phenyl­tetra­hydro­furan-2,5-dione

In the title compound, C10H8O3, the dihedral angle between the approximately planar tetra­hydro­furan-2,5-dione ring [maximum deviation 0.014 (3) Å] and the phenyl ring is 85.68 (8)°. Weak C—H⋯O=C inter­molecular hydrogen-bonding contacts are observed in the structure

Di-μ3-oxido-bis­(μ2-quinaldato-κ2 O:O)­bis­(quinaldato-κ2 N,O)tetra­kis[di-n-butyl­tin(IV)]

The title tetra­nuclear SnIV complex, [Sn4(C4H9)8(C10H6NO2)4O2], is a cluster built up by inversion symmetry around the central Sn2O2 ring. The coordination geometries of the Sn atoms involved can be classified into two types: the five-coordinate Sn atoms of the central Sn2O2 core have a trigonal–bipyramidal geometry, with axial positions occupied by a μ3-O atom and a μ2-O atom belonging to the nonchelating quinaldate ligand. The peripheral Sn atoms are six-coordinate, with a distorted octa­hedral geometry. The methyl group of an n-butyl ligand is disordered over two sites, with occupancies of 0.643 (12) and 0.357 (12)

Bis(5-amino-2-chloro­benzoato-κO)triphenyl­anti­mony(V)

In the title compound, [Sb(C6H5)3(C7H5ClNO2)2], the Sb center has a distorted trigonal-bipyramidal geometry, with the O atoms of two carboxyl­ate groups in axial positions and the C atoms of the phenyl groups in equatorial positions. Intra­molecular C—H⋯O inter­actions occur. The mol­ecules are connected by inter­molecular N—H⋯O, N—H⋯N and C—H⋯O hydrogen-bonding inter­actions and C—H⋯π stacking inter­actions, forming a three-dimensional supra­molecular framewor

3-Hy­droxy-N′-[(E)-2-thienyl­methyl­idene]-2-naphtho­hydrazide

The asymmetric unit of the title compound, C16H12N2O2S, contains three independent mol­ecules. Intra­molecular N—H⋯O hydrogen bonds in the three mol­ecules lead to very similar conformations: the thio­pene ring and naphthalene ring system in the three mol­ecules form dihedral angles of 10.3 (2), 9.1 (2) and 9.3 (3)°. In the crystal structure, inter­molecular O—H⋯O hydrogen bonds link the mol­ecules into chains propagating in [031]

[5-Chloro-2-hy­droxy-N′-(2-oxidobenzyl­idene)benzohydrazidato]dimethyl­tin(IV)

In the title compound, [Sn(CH3)2(C14H9ClN2O3)], the SnIV ion is coordinated by one N and two O atoms from the tridentate 5-chloro-2-hy­droxy-N′-(2-oxidobenzyl­idene)benzohydrazidate (L) ligand and two methyl groups in a distorted trigonal–bipyramidal geometry. In the ligand, the hy­droxy group is involved in an intra­molecular O—H⋯N hydrogen bond and the two aromatic rings form a dihedral angle of 5.5 (1)°. In the crystal, weak inter­molecular C—H⋯O hydrogen bonds and π–π inter­actions between the aromatic rings [centroid–centroid distance = 3.816 (3) Å] link the mol­ecules into centrosymmetric dimers

Bis(2-amino-4-chloro­benzoato)triphenyl­anti­mony(V)

The title complex mol­ecule, [Sb(C6H5)3(C7H5ClNO2)2], possesses crystallographically imposed C 2 symmetry. The Sb atom exhibits a trigonal-bipyramidal geometry with the axial positions occupied by the O atoms of two carboxyl­ate groups and the equatorial positions by the C atoms of the phenyl groups. Intra­molecular N—H⋯O and C—H⋯O hydrogen bonds occur

Bis(μ-chloroacetato-κ2 O:O′)bis(chloro­acetato-κO)di-μ3-oxido-tetrakis[dibenzyl­tin(IV)]

The title tetra­nuclear complex mol­ecule, [Sn4(C7H7)8(C2H2ClO2)4O2], has crystallographically imposed inversion symmetry. Each Sn atom has a distorted trigonal–bipyramidal geometry, with the equatorial plane formed by an oxido O atom and two C atoms of two benzyl anions. The configuration of the complex is stabilized by a pair of C—H⋯O hydrogen bonds. In the crystal, complex mol­ecules are linked into zigzag chains along [110] by C—H⋯O hydrogen bonds

Bis(cyclohexylammonium) 2,2′-disulfanediyldibenzoate

In the title molecular salt, 2C6H14N+·C14H8O4S2 2−, the complete dianion is generated by crystallographic twofold symmetry and a twisted conformation is found [the C—S—S—C torsion angle is 87.13 (2)° and the dihedral angle between the rings is 83.4 (2)°]. In the crystal, inter­molecular N—H⋯O hydrogen bonds link the cations and anions