Bis{2-meth­oxy-6-[(3-methoxy­prop­yl)imino­meth­yl]phenolato-κ2 N,O 1}copper(II)

The title complex, [Cu(C12H16NO3)2], adopts a distorted square-planar coordination geometry with the CuII ion situated on a crystallographic inversion center. The two Schiff base ligands are coordinated in a trans fashion. In the crystal structure, non-classical inter­molecular C—H⋯O hydrogen bonds involving the ether O atoms link the Schiff base mol­ecules into a two-dimensional network parallel to (101)

End-to-end thiocyanato-bridged helical chain polymer and dichlorido-bridged copper(II) complexes with a hydrazone ligand: synthesis, characterisation by electron paramagnetic resonance and variable- temperature magnetic studies, and inhibitory effects on human colorectal carcinoma cells

The reactions of the tridentate hydrazone ligand, N’-[1-(pyridin-2-yl)ethylidene]acetohydrazide (HL), obtained by condensation of 2-acetylpyridine with acetic hyadrazide, with copper nitrate trihydrate in the presence of thiocyanate, or with CuCl2 produce two distinct coordination compounds, namely a one-dimensional helical coordination chain of [CuL(NCS)]n (1) units, and a doubly chlorido-bridged dinuclear complex [Cu2L2Cl2] (2) (where L=CH3C(O)=N − N=CCH3C5H4N). Single-crystal X-ray structural determination studies reveal that in complex 1, a deprotonated hydrazone ligand L- coordinates a copper(II) ion that is bridged to two neighbouring metal centres by SCN- anions, generating a one-dimensional helical coordination chain. In complex 2, two symmetry-related, adjacent copper(II) coordination entities are doubly chlorido-bridged, producing a dicopper entity with a Cu···Cu distance of 3.402 (1). The two coordination compounds have been fully characterised by elemental analysis, spectroscopic techniques including IR, UV– vis and electron paramagnetic resonance, and variable-temperature magnetic studies. The biological effects of 1 and 2 on the viability of human colorectal carcinoma cells (COLO-205 and HT-29) were evaluated using an MTT assay, and the results indicate that these complexes induce a decrease in cell-population growth of human colorectal carcinoma cells with apoptosis

Dichlorido{N′-[(pyridin-2-yl)methyl­idene-κN]acetohydrazide-κ2 N′,O}copper(II)

In the title compound, [CuCl2(C8H9N3O)], the CuII atom has a distorted square-pyramidal CuCl2N2O coordination geometry. The tridentate acetohydrazide ligand occupies three basal positions, the fourth basal position being defined by a chloride anion at a distance of 2.2116 (6) Å. The second chloride anion is in the apical position and forms a longer Cu—Cl distance of 2.4655 (7) Å. Inter­molecular N—H⋯Cl hydrogen bonds are present in the crystal, leading to the formation of chains along [10]

Azido­(benzoyl­acetonato-κ2 O,O′)[1-phenyl-3-(2-pyridylmethyl­imino)but-1-en-1-olato-κ3 N,N′,O]cobalt(III)

In the title complex, [Co(C16H15N2O)(C10H9O2)(N3)], the CoII atom adopts an octa­hedral coordination geometry by a tridentate Schiff base, a bidentate benzoyl­acetonate and an azide ligand. The imine N atom of the tridentate ligand is trans to the benzoyl O atom of the bidentate ligand and the azide ligand is trans to the acetyl O atom of the bidentate ligand. Non-classical intra­molecular Car­yl—H⋯O hydrogen bonds are present in the structure

A mixed valent heterometallic Cu-II/Na-I coordination polymer with sodium-phenyl bonds

A mixed valent heterometallic Cu/Na coordination polymer (1) is generated by the reaction of a Schiff base ligand, (6,6′-(1E,1′E)-(2-hydroxypropane-1,3-diyl)bis(azan-1-yl-1-ylidene) bis(methan-1-yl-1-ylidene)bis(2-methoxyphenol)) with copper(ii) acetate and sodium perchlorate. In addition to the presence of alcohol oxygen-sodium coordination bonds, the single crystal X-ray structure reveals that the 1D coordination polymer is stabilised by the formation of phenyl-sodium η-bonds, face-to-face π-π contacts and Cu-π interactions. This journal i

Di-μ-azido-bis­({N′-[1-(2-pyrid­yl-κN)ethyl­idene]acetohydrazidato-κ2 N′,O}dicopper(II))

The dimeric title compound, [Cu2(C9H10N3O)2(N3)2], is located on a crystallographic inversion center. The Cu atom is coordinated by a tridentate anionic hydrazone ligand and two bridging azide ligands in a distorted square-pyramidal coordination geometry. The non-bonding Cu⋯Cu distance is 3.238 (1) Å. Non-classical inter­molecular C—H⋯N hydrogen bonds link the dimers into chains along the c axis

Dichlorido{2-[2-(dimethyl­ammonio)ethyl­imino­meth­yl]-6-methoxy­phenolato}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

Dichlorido{N′-[1-(2-pyridin-2-yl)ethyl­idene]acetohydrazide-κ2 N′,O}copper(II)

In the title compound, [CuCl2(C9H11N3O)], the CuII atom is in a distorted square-pyramidal CuCl2N2O coordination geometry. The tridentate acetohydrazide ligand chelates in a meridional fashion. The chloride ligand in the axial position forms a long Cu—Cl distance of 2.4892 (9) Å. In contrast, the Cu—Cl distance from the equatorial chloride ligand is much shorter [2.2110 (7) Å]. Inter­molecular N—H⋯Cl and C—H⋯Cl hydrogen bonds link the complexes into a three-dimensional network

Bis{N′-[1-(2-pyrid­yl)ethyl­idene-κN]benzohydrazidato-κ2 N′,O}nickel(II)

In the title complex, [Ni(C14H12N3O)2], the NiII atom lies at the centre of a distorted octahedron formed by two tridentate hydrazone ligands. Inter­molecular hydrogen bonds of the type C—H⋯X (X = N, O) link the complexes into a two-dimensional network

Bis[N′-(2-pyridylmethyl­ene-κN)benzo­hydrazide-κN′]bis­(thio­cyanato-κN)cobalt(II)

In the title complex, [Co(NCS)2(C13H11N3O)2], the CoII centre adopts a distorted octa­hedral coordination geometry with two cis-bidentate Schiff base ligands and two cis thio­cyanate ligands. The Schiff base ligand coordinates via the imine N and pyridine N atoms. The CoII atom lies on a crystallographic twofold rotational axis. Non-classical inter­molecular C—H⋯O hydrogen bonds link the complex mol­ecules into chains along [001]