{6,6'-Dimeth-oxy-2,2'-[4-bromo-o-phenyl-enebis(nitrilo-methyl-idyne)]diphenolato}nickel(II) methanol solvate.

In the title compound, [Ni(C(22)H(17)BrN(2)O(4))]·CH(3)OH, 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 nickel complex and one methanol solvent mol-ecule. The dihedral angle between the aromatic ring planes of the central aromatic ring and other two aromatic rings are 10.8 (3) and 6.0 (2)°. The crystal structure is stabilized by inter-molecular C-H⋯O and C-H⋯Br and by intra-molecular O-H⋯O hydrogen bonds.

(E)-2-[(2-Amino-4,5-dibromo-phen-yl)imino-meth-yl]-6-methoxy-phenol.

The title compound, C(14)H(12)Br(2)N(2)O(2), was prepared from the condensation of 4,5-dibromo-1,2-phenyl-enediamine and 2-hydr-oxy-3-methoxy-benzaldehyde in methanol. The N=C double bond shows a trans conformation and the dihedral angle between the aromatic ring planes is 5.9 (4)°. In the crystal structure, there are intra-molecular O-H⋯N and N-H⋯N and inter-molecular N-H⋯O hydrogen bonds, the latter resulting in inversion dimers.

Di-µ-chlorido-bis-[chlorido(N,N-di-methyl-ethylenediamine-κN,N')zinc(II)].

The centrosymmetric dinuclear title compound, [Zn(2)Cl(4)(C(4)H(12)N(2))(2)], is isostructural with its previously reported Cu(II) analogue [Phelps, Goodman & Hodgson (1976 ▶). Inorg. Chem.15, 2266-2270]. In the title compound, each of the Zn(II) ions is coordinated by two N atoms from a chelating N,N-dimethyl-ethylenediamine ligand, two bridging Cl atoms and one terminal Cl atom. The coordination environment is distorted square-pyramidal. The Zn-Cl bond distances of the two bridging Cl atoms are distinctly different: the equatorial Cl atom exbibits a Zn-Cl distance of 2.318 (1) Šand the axial Cl atom exbibits a Zn-Cl distance of 2.747 (2) Å, which is significantly longer. The mol-ecule can thus be seen as a dimer of two nearly square-planar monomeric units which are related to each other by an inversion center located in the middle of the dimer. Within one monomeric unit, the Zn atom, the two N atoms and the two Cl atoms are almost coplanar, with a mean deviation of only 0.05 (1) Šfrom the associated least-squares plane. The Zn⋯Zn distance within the dimer is 3.472 (3) Å. N-H⋯Cl and C-H⋯Cl hydrogen-bond inter-actions connect neighboring mol-ecules with each other.

N-[4-(Prop-2-yn-yloxy)phen-yl]maleimide.

In the title compound, C(13)H(9)NO(3), the dihedral angle between the benzene and maleimide rings is 64.1 (2)°. In the crystal structure, mol-ecules interact via C-H⋯O inter-actions.