In the title compound, [CuBr(C(17)H(20)N(4))]BF(4), the Cu(II) ion is five-coordinated by the four N atoms of the tetra-dentate Schiff base ligand and by one bromide ion, thereby forming a square-pyramidal CuN(4)Br coordination geometry. The dihedral angle between the pyridine rings of the Schiff base is 54.39 (18)°. In the crystal, the components are linked by C-H⋯F inter-actions.

In the title complex, [CuSm(C(19)H(20)N(2)O(4))(NO(3))(3)]·CH(3)CO-CH(3), the Cu(II) atom is four-coordinated in a square-planar geometry by two O atoms and two N atoms of the deprotonated Schiff base. The Sm(III) atom is ten-coordinate, chelated by three nitrate groups and linked to the four O atoms of the deprotonated Schiff base.

In the title compound, [CuZnCl(2)(C(19)H(20)N(2)O(4))], the Cu(II) ion exhibits a slightly distorted square-planar coordination geometry defined by two N atoms and two O atoms of the 6,6'-dimeth-oxy-2,2'-[propane-1,3-diylbis(nitrilo-methyl-idyne)]diphenolate Schiff base ligand. The Zn(II) ion is also four-coordinated by the two phenolate O atoms of the Schiff base ligand and by two cis-coordina...

The structure of the title complex, [ZnCl(2)(C(12)H(18)N(2)O(2))], contains a zwitterionic Schiff base ligand. The complex adopts a distorted tetra-hedral 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, inter-molecular N-H⋯O and C-H⋯Cl hydrogen bonds link the mol-ecules into chain...

In the title compound, C(15)H(13)N(3)O(4)·CH(3)OH, the dihedral angle between the two substituted benzene rings is 66.7 (2)°. An intra-molecular O-H⋯N hydrogen bond is observed in the Schiff base mol-ecule. In the crystal structure, the Schiff base and solvent mol-ecules are linked into chains running along the a axis by inter-molecular O-H⋯O and N-H⋯O hydrogen bonds.

The Co(II) atom in the title monomeric Schiff base complex, [CoCl(2)(C(21)H(22)N(2))], is bonded to two Cl atoms and to two N atoms of the Schiff base ligand N,N'-bis-[(E)-3-phenyl-prop-2-en-1-yl-idene]propane-1,3-diamine in a distorted tetra-hedral geometry. The mol-ecule has an idealised mirror symmetry, but is not located on a crystallographic mirror plane.

High-resolution X-ray crystallographic studies of bacteriorhodopsin have tremendously advanced our understanding of this light-driven ion pump during the last 2 years, and emphasized the crucial role of discrete internal water molecules in the pump cycle. In the extracellular region an extensive three-dimensional hydrogen-bonded network of protein residues and seven water molecules leads from t...

The work being reported here deals with the design of a new type of "N-H" Ni(II) complexes of glycine Schiff bases and study general aspects of their reactivity. It was confirmed that the presence of NH function in these Ni(II) complexes does not interfere with the homologation of the glycine residue, rendering these derivatives of high synthetic value for the general synthesis of α-amino acids...

In the title compound, C(17)H(15)N(3)O(2)·C(2)H(6)O, Schiff base molecules are linked by a hydr-oxy-amido hydrogen bond into a helical chain running along the b axis. This chain is consolidated by two other hydrogen bonds; the ethanol solvent mol-ecule is a hydrogen-bond donor to the amide group and a hydrogen-bond acceptor for the indolyl NH group of an adjacent Schiff base mol-ecule.

In the title compound, C(15)H(14)N(2)O(3)·H(2)O, the Schiff base mol-ecule is approximately planar, with a dihedral angle between the two aromatic rings of 10.2 (3)°. The mol-ecular structure is stabilized by O-H⋯N and N-H⋯O hydrogen bonds. In the crystal structure, the Schiff base and water mol-ecules are linked together by inter-molecular O-H⋯O hydrogen bonds, forming chains parallel to the a...