Dichlorido{2-[3-(dimethyl-ammonio)-propyl-imino-meth-yl]phenolato}zinc(II) hemihydrate

A triclinic polymorph of dichlorido(2-{[2-(isopropylammonio)ethyl]iminomethyl-κN}-5-methoxyphenolato-κO1)zinc

The title compound, [ZnCl₂(C₁₃H₂₀N₂O₂)], was first reported in the monoclinic space group P2₁/n [Han et al. (2010 ▶). Acta Cryst. E66, m469]. This investigation reveals a triclinic polymorph in the space group P-1 with an asymmetric unit that contains two independent mol­ecules of the mononuclear zinc(II) complex. In each mol­ecule, the Zn^II atoms are coordinated in a bidentate fashion by the phenolate O and imine N atoms of the Schiff base ligand. Two Cl⁻ anions complete the tetra­hedral coordination in each case. The most obvious difference between the two forms is that the Zn—L (L = O, N, Cl) bond lengths in both unique mol­ecules are longer than those found in the monoclinic polymorph, or indeed in other similar complexes. In the crystal, mol­ecules are linked through N—H⋯O and N—H⋯Cl hydrogen bonds, forming chains along the b axis.

Dichlorido[2-({[3-(cyclo-hexyl-aza-nium-yl)prop-yl]imino}-meth-yl)-5-meth-oxy-phenolate]zinc

The title mononuclear zinc complex, [ZnCl(2)(C(17)H(26)N(2)O(2))], was obtained by the reaction of 2-hy-droxy-4-meth-oxy-benzaldehyde, N-cyclo-hexyl-propane-1,3-diamine and zinc chloride in methanol. The Zn(II) atom is four-coordinated by the phenolate O atom and imine N atom of the bidentate zwitterionic Schiff base ligand 2-{[3-(cyclo-hexyl-amino)-prop-yl]imino-meth-yl}-5-meth-oxy-phenol, and by two chloride ions, generating a distorted ZnONCl(2) tetra-hedral geometry. In the crystal, mol-ecules are linked by N-H⋯O hydrogen bonds, forming chains along the c-axis direction.

Dichlorido(2-{[3-(morpholin-4-ium-4-yl)prop-yl]imino-meth-yl}phenolate)zinc

In the zwitterionic zinc title complex, [ZnCl₂(C₁₄H₂₀N₂O₂)], the Zn^II ion is four-coordinated in a distorted tetra­hedral geometry. The Schiff base ligand employs its phenolate O and imine N atoms to coordinate the metal atom in a bidentate mode. Two Cl atoms complete the tetra­hedral coordination environment. In the crystal, a pair of N—H⋯O hydrogen bonds connect the mol­ecules into a centrosymmetric dimer. C—H⋯O, C—H⋯Cl and C—H⋯π inter­actions are also observed.

{4-Bromo-2-[2-(piperidin-1-ium-1yl)ethyl-iminometh-yl]phenolato}diiodido-zinc(II)

In the title complex, [ZnI(2)(C(14)H(19)BrN(2)O)], the Zn(II) atom is four-coordinated by the imine N and phenolate O atoms of the Schiff base ligand and by two iodide ions in a distorted tetra-hedral coordination. In the crystal structure, mol-ecules are linked through inter-molecular N-H⋯O hydrogen bonds, forming chains running along the b axis.

Dichlorido{2-[2-(dimethyl-ammonio)ethyl-imino-meth-yl]-6-methoxy-phenolato}zinc(II)

The structure of the title complex, [ZnCl₂(C₁₂H₁₈N₂O₂)], contains a zwitterionic Schiff base ligand. The complex adopts a distorted tetra­hedral coordination geometry around the metal centre with the Schiff base ligand coordinated in a bidentate fashion via the imine N and phenolate O atoms. In the crystal, inter­molecular N—H⋯O and C—H⋯Cl hydrogen bonds link the mol­ecules into chains parallel to the c-glide planes.