In the title compound, C(17)H(17)NO(2), the phenyl-ene rings are bent with respect to the carbon-carbon double bond [dihedral angle between rings = 39.6 (1)°]. The acetamido group is twisted out of the plane of the aromatic ring [dihedral angle = 44.2 (1)°] in order to form an N-H⋯O hydrogen bond to the acetamido group of an adjacent mol-ecule, generating a zigzag chain running along the c axis.
In the title compound, C(17)H(17)NO(2), the phenyl-ene rings are nearly coplanar [dihedral angle 7.3 (1)°]. The acetamido group is twisted out of the plane of the aromatic ring in order to form an N-H⋯O hydrogen bond to the acetamido group of an adjacent mol-ecule, generating a helical chain running along the b axis.
There are two mol-ecules in the asymmetric unit of the title compound, C(12)H(12)N(2), with dihedral angles between the aromatic rings of 48.35 (12) and 51.02 (12)°. In the crystal structure, both mol-ecules form inversion dimers, linked by pairs of N-H⋯N hydrogen bonds.
The complete mol-ecule of the title compound, C(26)H(20)N(2), is generated by crystallographic inversion symmetry. The terminal phenyl ring is twisted by 19.2 (1)° with respect to the adjacent phenyl-ene ring.
In the approximately planar title mol-ecule, C(14)H(10)BrClN(3)O(2), the dihedral angle between the aromatic ring planes is 5.79 (12)°. The conformation is stabilized by intra-molecular O-H⋯N and N-H⋯O hydrogen bonds and an inter-molecular O-H⋯O link leads to chains in the crystal propagating in [001].
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 title Schiff base, C(17)H(15)N(3)O(3), exists in the zwitterionic form with the phenol H atom transferred to the imine group. Adjacent zwitterions are linked into a linear chain running along the a axis by an indole-hydr-oxy N-H⋯O hydrogen bond [3.100 (2) Å].
The mol-ecule of the title compound, C(14)H(10)FN(3)O(3)S, consists of an indole unit and a phenylsulfonyl unit that are disposed in an approximately trans orientation relative to the N-N single bond. Two mol-ecules are arranged about a center of inversion, forming a hydrazide-carbonyl N-H⋯O hydrogen-bonded dimer; the dimers are linked by an indole-sulfonyl N-H⋯O hydrogen bond into a ribbon.
In the crystal structure of the title compound, [Cr(3)(C(2)Cl(3)O(2))(7)O(H(2)O)(2)]·3CH(3)CN, the trinuclear [Cr(3)O(H(2)O)(2)(Cl(3)CCO(2))(7)] mol-ecule has an oxide O atom that is connected to one monodentate trichloro-acetate-coordinated and two water-coordinated Cr(III) atoms, the three metal atoms forming the points of an equilateral triangle. Each of the six remaining carboxyl-ate groups bridges a Cr-O-Cr fragment. The cluster inter-acts with the three solvent mol-ecules through water-acetonitrile O-H⋯N hydrogen bonds. Adjacent clusters are linked by a water-carboxylate O-H⋯O hydrogen bond to give a helical chain. One of the CCl(3) groups was found to be disordered over two positions, with the major component having a site-occupancy factor of 0.64 (1).
Mol-ecules of the title compound, C(14)H(8)N(2)O(5), are linked by a hydr-oxy-amide O-H⋯O hydrogen bond into a linear chain. The hydr-oxy group is disordered over two positions of the benzene ring in an approximate 0.57:0.43 ratio.
The Sn atom in the title compound, [Sn(C(4)H(9))(2)(C(7)H(5)O(3))(2)], is chelated by the carboxyl-ate groups of 2-hydroxy-benzoate liagnds, and exists in a six-coordinate skew-trapezoidal bipyramidal coordination geometry [C-Sn-C = 140.1 (3)°].
In the title centrosymmetric dinuclear complex, [Cu(2)(C(15)H(11)BrN(2)O(3)S)(2)(C(2)H(6)OS)(2)], the Cu(II) ion is N,O-chelated by a dianionic ligand, monocoordinated by the sulfonamide N atom of a symmetry-related ligand and coordinated by an O atom from a dimethyl sulfoxide ligand, forming a distorted square-planar coordination geometry.
In the title compound, C(37)H(38)N(4)O(6), four five-membered nitro-gen-bearing rings are nearly coplanar. Two N atoms in two these five-membered rings have attached H atoms, which contribute to the formation of intra-molecular N-H⋯N hydrogen bonds [N⋯N = 2.713 (5)-3.033 (6) Å].
The mol-ecule of the title compound, C(17)H(14)N(4)O(4), uses its amide -NH- group to form a hydrogen bond to the amido -C(=O)- group of an adjacent mol-ecule to furnish a linear chain structure. The hydr-oxy group forms an intra-molecular hydrogen bond; the indolyl -NH- unit does not engage in any strong hydrogen-bonding inter-actions.
In the title compound, C(13)H(12)N(2)O(4)S, the dihedral angle between the two aromatic rings is 89.5 (1)°. In the crystal structure, mol-ecules are linked by O-H⋯O(hydr-oxy) and N-H⋯O(sulfon-yl) hydrogen bonds, forming a ribbon that propagates along the b axis; there is also an intra-molecular O-H⋯N hydrogen bond.
The Zn atom in the title compound, [Zn(C(17)H(14)ClN(2)O)(2)], is N,O-chelated by two deprotonated Schiff base monoanionic ligands in a tetra-hedral coordination geometry. The Zn atom lies on a special position of site symmetry 2.
The Schiff base mol-ecule of the title compound, C(15)H(14)N(2)O(4)·H(2)O, adopts a trans configuration with respect to the C=N double bond; the Schiff base itself is almost planar (r.m.s. deviation for all non-H atoms = 0.040 Å). The amido N atom is the hydrogen-bond donor to the water mol-ecule, which is the hydrogen-bond donor to the hydr-oxy groups of two neighboring mol-ecules. One of the hydroxyl groups acts as an intra-molecular and the other as an inter-molecular hydrogen-bond donor.
The pyridine-coordinated Cu(II) atom in the title Schiff base complex, [Cu(C(15)H(11)N(3)O(5))(C(5)H(5)N)], is O,N,O'-chelated by the doubly deprotonated Schiff base ligand. The metal centre is in a square-planar coordination geometry.