The carbonyl unit of the title compound, C(13)H(10)Cl(2)N(2)O, lies on a twofold rotation axis. The ring is aligned at 51.6 (1)° with respect to the N-C(=O)-N fragment. The two -NH- fragments of one mol-ecule form hydrogen bonds [2.845 (2) Å] to the C=O fragment of an adjacent mol-ecule, giving rise to the formation of a linear hydrogen-bonded chain.
The Ni atom in the crystal structure of the centrosymmetric title compound, [Ni(C(19)H(15)N(6)S)(2)]·2C(2)H(6)OS, is N,S-chelated by the deprotonated Schiff bases in a square-planar geometry. The -CH=N-N=C(S)-NH-N=CH- frament is planar. The two indolyl -NH (donor) sites inter-act with dimethyl sulfoxide mol-ecules to furnish a layer motif.
The Ni atom in the title compound, [Ni(C(17)H(15)N(2)O)(2)]·2C(3)H(7)NO, lies on a twofold rotation axis. It is N,O-chelated by the deprotonated Schiff base 2-[2-(1H-indol-3-yl)ethyl-imino-meth-yl]phenolate ligand in a square-planar coordination environment. The mol-ecule is linked to a solvent mol-ecule by an indole-dimethyl-formamide N-H⋯O hydrogen bond.
The mol-ecule of the dinuclear title compound, [Sn(2)(C(5)H(9))(2)(C(6)H(5))(4)(C(2)F(3)O(2))(2)(C(28)H(28)O(2)P(2))], lies on a center of inversion at the mid-point of the central C-C bond of the bridging phosphine oxide ligand. The Sn atom is five-coordinate in a trans-C(3)SnO(2) trigonal-bipyramidal geometry.
The tin(IV) atom in the salt, (C(7)H(11)N(2))(2)[SnBr(2)(CH(3))(2)Cl(2)], lies on a center of inversion in a tetra-gonally compressed octa-hedron; the bromine atoms are disordered with the chlorine atoms, so that they appear to share the same site. The crystal structure is stabilized by N-H⋯Br hydrogen bonds.
In the title salt, [Ag(C(26)H(24)P(2))(2)][Sn(C(2)ClF(2)O(2))(2)(C(6)H(5))(2)(C(6)H(4)Cl)], the Ag(I) atom has a tetra-hedral and the Sn(IV) atom a trans-trigonal-bipyramidal coordination geometry. In the anion, the chloro substituent is disordered over two rings (occupancy ratio 0.81:0.19); the two chloro-difluoro-methyl groups are also disordered over two sites for their halogen atoms (occupancy ratios 0.72:0.28 and 0.70:0.30).
The Ni atom in the centrosymmetric title compound, [Ni(C(10)H(9)N(4)S)(2)], is N,S-chelated by the deprotonated Schiff bases in a square-planar geometry. The -CH=N-N=C(S)-NH(2) frament is planar. Adjacent mol-ecules are linked by hydrogen bonds between the indolyl -NH (donor) site and the double-bond =N- (acceptor) site of an adjacent mol-ecule, forming a layer motif.
The Sn(IV) atom in the title salt, (C(7)H(11)N(2))(2)[SnBr(3)(CH(3))(2)Cl], lies on a center of inversion in a tetra-gonally compressed octa-hedron; two independent Br atoms share the same site as two independent chlorine atoms so that the anion effectively has one Cl and three Br atoms. The occupancies of the Br atoms are 0.721 (1) and 0.779 (1), and those of the Cl atoms are 0.279 (1) and 0.221 (1). The crystal structure involves N-H⋯halogen hydrogen bonds.
The title mol-ecule, C(11)H(11)NO(3), lies on a crystallographic mirror plane which bis-ects the plane of the phthalimide unit and contains the C and O atoms of the 2-methoxy-ethyl group.
In the crystal structure of the title compound, CH(6)NO(+)·Cl(-), the cations and anions are linked by N-H⋯Cl and O-H⋯Cl hydrogen bonds into an undulating layer motif [Schläfli symbol: 4(8).6(8).8(2)]. All non-H atoms lie on a mirror plane.
The hydr-oxy groups in the title compound, C(16)H(14)O(4), are each hydrogen bonded to the adjacent meth-oxy O atom; one of the two hydr-oxy groups is additionally linked to the O atom of the meth-oxy group of another mol-ecule, forming a linear chain.
N-Isobutyl-phthalimic acid hydrolyzes to the title salt, 2C(4)H(12)N(+)·C(8)H(4)O(4) (-)·H(2)O, which adopts a hydrogen-bonded layer structure. In the anion, the carboxyl-ate groups are twisted with respect to the benzene ring [dihedral angles = 43.8 (1) and 50.9 (1)°].
In the title compound, C(17)H(15)N(3)O(2)·C(2)H(6)O, Schiff base molecules are linked by a hydr-oxy-amido hydrogen bond into a helical chain running along the b axis. This chain is consolidated by two other hydrogen bonds; the ethanol solvent mol-ecule is a hydrogen-bond donor to the amide group and a hydrogen-bond acceptor for the indolyl NH group of an adjacent Schiff base mol-ecule.
In the planar title mol-ecule, C(16)H(16)N(2)O(4)·C(2)H(6)O, the planar Schiff base molecule is linked to the ethanol solvent mol-ecule by a hydr-oxy-amide hydrogen bond. The hydr-oxy group of the ethanol mol-ecule is a hydrogen-bond donor to the double-bonded N atom of an adjacent Sciff base, pairs of interactions taking place across a center of symmetry and giving rise to a hydrogen-bonded dimer.
The mol-ecule of the title compound, C(8)H(12)O(4), lies on a twofold rotation axis that passes through the mid-points of two opposite C-C bonds of the ring. Carboxyl groups of adjacent mol-ecules are linked by pairs of hydrogen bonds around a centre of inversion; this inter-action gives rise to a chain that runs along [101].
A second monoclinic polymorph of methyl 4-hydroxy-benzoate, C(8)H(8)O(3), is reported. The unit-cell dimensions are different from those of the previously reported monoclinic form [Vujovic & Nassimbeni (2006 ▶). Cryst. Growth Des.6, 1595-1597]. The asymmetric unit contains three crystallographically independent mol-ecules, as observed in the previous form. The crystal structure is stabilized by inter-molecular O-H⋯O and C-H⋯O hydrogen bonds and C-H⋯π inter-actions, which link the mol-ecules into a three-dimensional network.
The title compound, C(30)H(34)O(5), crystallizes with two symmetry-independent mol-ecules in the asymmetric unit. In the crystal structure, the two independent mol-ecules are disposed about a pseudo-center of inversion. An intra-molecular O-H⋯O hydrogen bond is observed in each independent mol-ecule. The crystal structure is stabilized by C-H⋯O hydrogen bonds.
The Cu atom in the title compound, [Cu(C(13)H(9)BrClN(2)O(3)S)(2)], is chelated by two deprotonated Schiff base ligands in a square-planar coordination geometry; the Cu atom lies on a center of inversion. The -NH- group of one anion forms an intra-molecular hydrogen bond to the phenolate atom of the symmetry-related ion.
The dinuclear title compound, [Zn(2)(C(19)H(17)N(3)O(2))(2)(H(2)O)(2)]·4C(2)H(6)OS, lies about a center of inversion. The deprotonated monoanion O,N,O-chelates the Zn atom; the hydr-oxy O atom also engages in bonding to the symmetry-related Zn atom so that one N and three O atoms form a square around the metal. The coordination geometry is square-pyramidal, with the apical site occupied by a water mol-ecule. Hydrogen bonds, with the water mol-ecule serving as donor atom, lead to the formation of a linear chain motif. There is an N-H⋯O hydrogen bond between the complex molecule and solvent O atom.
In the title complex, [Ni(C(20)H(22)N(2)O(4))]·0.5H(2)O, the Ni(II) ion is in a slightly distorted square-planar geometry involving an N(2)O(2) atom set of the tetra-dentate Schiff base ligand. The asymmetric unit contains one mol-ecule of the complex and half a water solvent mol-ecule. The solvent water mol-ecule lies on a crystallographic twofold rotation axis. An inter-molecular O-H⋯O hydrogen bond forms an R(2) (1)(4) ring motif involving a bifurcated hydrogen bond to the phenolate O atoms of the complex. In the crystal structure, mol-ecules are linked by π-π stacking inter-actions, with centroid-centroid distances in the range 3.5310 (11)-3.7905 (12) Å, forming extended chains along the b axis. In addition, there are Ni⋯Ni and Ni⋯N inter-actions [3.4404 (4)-4.1588 (4) and 3.383 (2)-3.756 (2) Å, respectively] which are shorter than the sum of the van der Waals radii of the relevant atoms. Further stabilization of the crystal structure is attained by weak inter-molecular C-H⋯O and C-H⋯π inter-actions.