{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.

Diiodido[N'-(2-methoxy-benzyl-idene)-N,N-dimethyl-ethane-1,2-diamine]zinc(II).

In the title complex, [Zn(C(12)H(18)N(2)O)I(2)], the Zn(II) ion is four-coordinated by the imine N and amine N atoms of the Schiff base ligand and by two iodide ions in a distorted tetra-hedral coordination.

{4-Bromo-2-[3-(diethyl-ammonio)propyl-imino-meth-yl]phenolato}diiodidozinc(II) methanol solvate.

In the title complex, [ZnI(2)(C(14)H(21)BrN(2)O)]·CH(3)OH, the asymmetric unit consists of a mononuclear zinc(II) complex mol-ecule and a methanol solvent mol-ecule. The compound was derived from the zwitterionic form of the Schiff base 4-bromo-2-[3-(diethyl-amino)propyl-imino-meth-yl]phenol. 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, the methanol mol-ecules are linked to the Schiff base mol-ecules through N-H⋯O and O-H⋯O hydrogen bonds. One I atom is disordered over two positions in a 0.702 (19):0.298 (19) ratio.

Diiodido{4-nitro-2-[2-(piperidin-1-yl)ethyl-imino-meth-yl]phenolato}zinc(II).

In the title complex, [ZnI(2)(C(14)H(19)N(3)O(3))], 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 dimers.

{(E)-2-[3-(Dimethyl-ammonio)propyl-iminometh-yl]phenolato}diiodidozinc(II).

The title complex, [ZnI(2)(C(12)H(18)N(2)O)], is a mononuclear zinc(II) compound derived from the zwitterionic form of the Schiff base (E)-2-[(3-dimethyl-amino-propyl-imino)meth-yl]phenol. 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 tetra-hedral coordination geometry. In the crystal structure, mol-ecules are linked through inter-molecular N-H⋯O hydrogen bonds, forming chains running along the b axis.

Dibromido{(E)-2-eth-oxy-6-[3-(methyl-ammonio)propyl-iminometh-yl]phenol-ato}zinc(II).

The title complex, [ZnBr(2)(C(13)H(20)N(2)O(2))], is a mononuclear zinc(II) compound derived from the zwitterionic form of the Schiff base (E)-2-eth-oxy-6-((3-(methyl-amino)propyl-imino)meth-yl)phenol. The Zn(II) atom is four-coordinated by the imine N and phenolate O atoms of the Schiff base ligand, and by two bromide ions, in a tetra-hedral coordination geometry. Adjacent mol-ecules are linked through inter-molecular N-H⋯O hydrogen bonds, forming chains running along the b axis.

Dibromido[N-propyl-N'-(2-pyridylmethyl-idene)ethane-1,2-diamine]zinc(II).

The title complex, [ZnBr(2)(C(11)H(17)N(3))], is a mononuclear zinc(II) compound derived from the Schiff base N-propyl-N'-(1-pyridin-2-ylmethyl-idene)ethane-1,2-diamine. The Zn(II) atom is five-coordinate, binding to the imine N, pyridine N, and amine N atoms of the Schiff base ligand and to two bromide anions in a distorted trigonal-bipyramidal coordination geometry. Adjacent mol-ecules are linked through inter-molecular N-H⋯Br hydrogen bonds, forming dimers.

Bis{(E)-2-eth-oxy-6-[2-(ethyl-ammonio)ethyl-iminometh-yl]phenolato}nickel(II) bis(perchlorate).

In the title centrosymmetric mononuclear nickel(II) complex, [Ni(C(13)H(20)N(2)O(2))(2)](ClO(4))(2), the Ni(II) atom is four-coordinated by the imine N and phenolate O atoms of the zwitterionic forms of two Schiff base ligands in a square-planar coordination geometry. In the crystal structure, mol-ecules are linked through inter-molecular N-H⋯O hydrogen bonds, forming chains running along the a axis.