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In the title compound, C(32)H(35)BrN(4)O(3), the piperazine ring exists in a chair conformation. The quinoline ring system is oriented at dihedral angles of 82.70 (17) and 19.54 (17)° to the phenyl and meth-oxy-phenyl rings, respectively. Weak inter-molecular C-H⋯π inter-actions are present in the crystal structure.

In the title compound, (C(22)H(23)N(2))[Hg(2)I(6)](0.5)·(CH(3))(2)SO, the 1-butyl-3-(1-naphthyl-meth-yl)benzimidazolium anion lies across a centre of inversion. The dihedral angle between the benzimidazolium and naphthalene ring systems is 81.9 (3)°. In the crystal structure, π-π stacking inter-actions are observed between the imidazolium ring and the unsubstituted benzene ring of the naphthalene ring system, with a centroid-centroid separation of 3.510 (5) Å. In the centrosymmetric anion, the Hg(II) atoms are in a distorted tetrahedral coordination. The dimethyl sulfoxide solvent mol-ecule is disordered over two sites with occupancies of 0.615 (9) and 0.385 (9).

The complete mol-ecule of the title compound, C(28)H(24)N(2)O(2), is generated by a centre of inversion (at the mid-point of the N-N bond). The substituents at the ends of the C=N bonds adopt an E,E configuration. The central -CH=N-N=CH- fragment is planar, but as a whole the mol-ecule is not: the benz-yloxy group is rotated about the O-C bond by 69.3 (2)° with respect to the plane of the benzyl-idene hydrazine unit.

In the planar [r.m.s. deviation 0.0265 Å] title compound, [Hg(C(7)H(5)O(2))Cl], the Hg(II) atom shows a typical linear coordination by a C atom of a benzene ring and a Cl atom. The benzene C atom and the aldehyde O atom chelate the Hg(II) atom by assuming the Hg⋯O separation of 2.817 (9) Å as a weak intra-molecular coordination bonding distance. The resulting five-membered metallacycle is nearly coplanar with the benzene ring dihedral angle 2.9 (1)°]. Inter-molecular O-H⋯O hydrogen bonds are present in the crystal structure, resulting in a one-dimensional supra-molecular architecture parallel to [201].

In the title compound, C(28)H(18)O(4)·2C(3)H(7)NO, the dihedral angle between the benzene rings and the anthracene system is 74.05 (12)°. A crystallographic inversion centre is located in the middle of the anthracene unit. The dimethyl-formamide solvent mol-ecules are partially disordered over two positions of approximately equal occupancy [0.529 (6):0.471 (6)]. Inter-molecular O-H⋯O hydrogen bonds with the major occupancy formamide O atom as acceptor result in the formation of 2:1 solvate-complex aggregates, which are alternately linked to shorter solvate units via weak inter-molecular C-H⋯O contacts generated from the rotational disorder of the formamide O atom (minor occupancy component). Weak C-H⋯π inter-actions between the solvent mol-ecules as the donor and the outer anthracene rings support these contacts in the crystal structure for both disorder components.

The mol-ecule of the title compound, C(16)H(24)N(2)O(6), which lies on a crystallographic inversion centre in the centre of the benzene ring, adopts an anti conformation in terms of the relative orientation of two amide carbonyl groups. One pair of the 2-hydroxy-ethyl groups is partially disordered with site occupancy factors of 0.811 (2) and 0.189 (2). The dihedral angle between the amide group and central benzene ring is 67.0 (2)°. Two O-H⋯O and one bifurcated O-H⋯(O,O) hydrogen bonds are present, resulting in a three-dimensional network.

In the title compound, [Fe(C(5)H(5))(C(11)H(10)NO)], the dihedral angle between the pyridyl and substituted cyclo-penta-dienyl rings is 20.4 (3)°. The H atoms of the methyl group are disordered over two positions; their site-occupation factors were fixed at 0.5. The crystal structure is stabilized by well defined inter-molecular O-H⋯N and C-H⋯O hydrogen bonds, leading to the formation of a two-dimensional network parallel to (101).

The title compound, [PdBr(2)(C(24)H(31)P)(2)], has a distorted trans square-planar coordination of the Pd atom, which occupies an inversion centre. The most important bond distances include Pd-P of 2.380 (2) Å and Pd-Br of 2.515 (2) Å. Weak inter-molecular π-π inter-actions between the benzene rings of adjacent mol-ecules [centroid-centroid distance = 3.949 (6) Å] are present via crystallographic inversion centres, resulting in a one-dimensional supra-molecular architecture.

In the title compound, C(51)H(45)N(9)O(3), three 1-(1H-benzotriazol-1-ylmeth-yl)-3-phen-yloxy (bmph) ligands are bonded to the central benzene ring in an asymmetric arrangement, two bmph located on one side of the central benzene ring and the other bmph located on the opposite side of the central benzene ring. The dihedral angles between the central benzene ring and the three pendant phenoxy rings are 76.71 (14), 67.81 (13) and 70.67 (16)°. In the crystal structure, one bmph is disordered over two sites in a 0.611 (5):0.389 (5) ratio. Some of the methyl H atoms are equally disordered over two sets of sites. Inter-molecular C-H⋯N hydrogen bonding is present in the crystal structure.