Crystallographic report: [(1,3‐Bis(4‐pyridyl)propane)(diaqua)zinc(II)] diperchlorate dihydrate

Four ligands of 1,3‐bis(4‐pyridyl)propane and two water molecules are coordinated to the zinc(II) atom so that the coordination geometry closely resembles a trans‐N₄O₂ octahedral environment. Copyright © 2004 John Wiley & Sons, Ltd.     

Crystallographic report: Polymeric [diaqua bis(3‐pyridylacrylato)zinc(II)]

The Zn center in [bis(3‐pyridylacrylato)diaquazinc(II)]_n is in a slightly distorted octahedral geometry within a cis‐N₂O₄ donor set. Each tridentate 3‐pyridylacrylate ligand links two Zn centers, resulting in the formation of a linear chain. Copyright © 2005 John Wiley & Sons, Ltd.     

Crystallographic report: Bis[N,N‐dimethyl‐N′‐(pyrid‐2‐ylmethyl)‐ethylenediamine]zinc(II) diperchlorate

The zinc(II) atom in the centrosymmetric complex is in a distorted N₆ octahedral geometry defined by two tridentate ligands. Copyright © 2004 John Wiley & Sons, Ltd.     

Crystallographic report: (4,4′‐Bipyridine)bis[bis(N,N‐diethyldithiocarbamato)zinc(II)]

The structure of [Zn(S₂CNEt₂)₂]₂(4,4′‐bipy) shows two independent dimeric molecules, one located about a centre of inversion, the other lying on a two fold axis containing the zinc atoms. Bidentate coordination by the dithiocarbamate ligands and a distorted square pyramidal geometry are found for two of zinc atoms whereas for the third zinc atom, the geometry is intermediate between square pyramidal and trigonal bipyramidal, a result that underscores the flexibility of coordination in these systems. Copyright © 2003 John Wiley & Sons, Ltd.     

Crystallographic report: A coordination polymer containing [Zn(NO3)(H2O)2(btp)2]+ units bridged by btp ligands (btp = 2,6‐bis(N′‐1,2,4‐triazolyl)pyridine)

A zinc(II) coordination polymer has been formed from Zn(NO₃)₂ and 2,6‐bis(N′‐1,2,4‐triazolyl)pyridine (btp) ligands in which each zinc(II) atom is coordinated by three nitrogen donor atoms from btp and three oxygen donor atoms from a nitrate and two water molecules. Copyright © 2003 John Wiley & Sons, Ltd.     

Crystallographic report: Bis{4‐[N,N‐bis(2‐cyanoethyl)amino]pyridine} dichlorozinc(II)

In (C₁₁H₁₂N₄)₂ZnCl₂, the zinc(II) center is coordinated by the pyridine nitrogen atoms of two 4‐[N,N‐bis(2‐cyanoethyl)amino]pyridine ligands and two chlorine atoms in a tetrahedral geometry. Copyright © 2004 John Wiley & Sons, Ltd.     

Crystallographic report: Dichloro[bis(1‐methylimidazole‐2)disulfide]zinc(II)

The Zn center in [ZnCl₂(L‐S‐S‐L)], where L‐S‐S‐L = bis(1‐methylimidazole‐2)disulfide, adopts a tetrahedral configuration defined by two Cl atoms and two N atoms from L‐S‐S‐L, which was obtained by in situ oxidation of 1‐methylimidazole‐2‐thione. Copyright © 2005 John Wiley & Sons, Ltd.     

Crystallographic report: Bis(4‐nitrobenzoato)bis(pyridine)zinc(II)

The molecular structure of [Zn(O₂CC₆H₄NO₂‐p)₂(pyridine)₂] exhibits a distorted N₂O₂ tetrahedral geometry around the zinc atom owing to the presence of monodentate p‐nitrobenzoate ligands; the molecule has twofold symmetry. Copyright © 2004 John Wiley & Sons, Ltd.     

Crystallographic report: (2,2′‐Bipyridine)bis(N,N‐dibenzyldithiocarbamato)zinc(II)

The structure of Zn[S₂CN(CH₂Ph)₂]₂(2,2′‐bipy) features a distorted trigonal prismatic geometry around the zinc centre defined by an N₂S₄ donor set; the molecule has two‐fold symmetry. Copyright © 2004 John Wiley & Sons, Ltd.     

Crystallographic report: (4,7‐Diphenyl‐1,10‐phenanthroline) bis(pyrrolinedithiocarbamato)zinc(II) chloroform solvate

The mononuclear structure of Zn(S₂CN(CH₂)₄)₂(4,7‐Ph₂‐1,10‐phenanthroline) shows the zinc atom in each of the two independent molecules comprising the asymmetric unit to exist in a distorted octahedral geometry defined by an N₂S₄ donor set. Copyright © 2003 John Wiley & Sons, Ltd.     

Crystallographic report: Bis[bis(N,N‐diethyldithiocarbamato)zinc(II)] (trans‐1,2‐bis(4‐pyridyl)ethylene)trans‐1, 2‐bis(4‐pyridyl)ethylene lattice adduct

The dimeric and centrosymmetric structure of [Zn(S₂CNEt₂)₂(trans‐NC₅H₄C(H)?C(H)C₅H₄N)]₂ shows bidentate coordination by the dithiocarbamate ligands and a distorted square pyramidal geometry for zinc, defined by a NS₄ donor set with the N atom in the apical position. The compound co‐crystallises with a centrosymmetric molecule of trans‐NC₅H₄C(H)?C(H)C₅H₄N that does not form a significant interaction to the Zn atom. Copyright © 2003 John Wiley & Sons, Ltd.     

Two new zinc(II) and mercury(II) complexes based on N,N′‐(cyclohexane‐1,2‐diylidene)bis(4‐fluorobenzohydrazide): synthesis,crystal structures and antibacterial activities

Reaction of N,N′‐(cyclohexane‐1,2‐diylidene)bis(4‐fluorobenzohydrazide), C₂₀H₁₈F₂N₄O₂, ( L^F ), with zinc chloride and mercury(II) chloride produced different types and shapes of neutral coordination complexes, namely, dichlorido[N,N′‐(cyclohexane‐1,2‐diylidene)bis(4‐fluorobenzohydrazide)‐κ²N,O]zinc(II), [ZnCl₂(C₂₀H₁₈F₂N₄O₂)], ( 1 ), and dichlorido[N,N′‐(cyclohexane‐1,2‐diylidene)bis(4‐fluorobenzohydrazide)‐κ⁴O,N,N′,O′]mercury(II), [HgCl₂(C₂₀H₁₈F₂N₄O₂)], ( 2 ). The organic ligand and its metal complexes are characterized using various techniques: IR, UV–Vis and nuclear magnetic resonance (NMR) spectroscopies, in addition to powder X‐ray diffraction (PXRD), single‐crystal X‐ray crystallography and microelemental analysis. Depending upon the data from these analyses and measurements, a typical tetrahedral geometry was confirmed for zinc complex ( 1 ), in which the Zn^II atom is located outside the bis(benzhydrazone) core. The Hg^II atom in ( 2 ) is found within the core and has a common octahedral structure. The in vitro antibacterial activities of the prepared compounds were evaluated against two different bacterial strains, i.e. gram positive Bacillus subtilis and gram negative Pseudomonas aeruginosa bacteria. The prepared compounds exhibited differentiated growth‐inhibitory activities against these two bacterial strains based on the difference in their lipophilic nature and structural features.     

Crystallographic report: Diaquabis(1,10‐phenanthroline)zinc(II) 4,5‐dihydroxy‐1,3‐benzenedisulfonate trihydrate

The zinc atom has a distorted octahedral geometry defined by two 1,10‐phenanthroline and two cis water molecules. A three‐dimensional network structure arises owing to extensive hydrogen bonds involving all the components of [Zn(phen)₂(H₂O)₂][C₆H₂(OH)₂(SO₃)₂]·3H₂O. Copyright © 2005 John Wiley & Sons, Ltd.     

Crystallographic report: [Diaqua bis(2,2′‐bipyridine)(µ‐naphthalene‐1,4,5,8‐tetracarboxylato)]dizinc(II) tetrahydrate

The title complex features a two‐dimensional polymeric structure owing to the presence of µ₄‐bridging naphthalene‐1,4,5,8‐tetracarboxylate ligands. The trigonal bipyramidal coordination geometry for zinc is completed by a chelating 2,2′‐bipyridine and a water molecule. Copyright © 2004 John Wiley & Sons, Ltd.     

Crystallographic report: Bis(m‐nitrobenzoato)bis(pyridine)zinc(II)

The molecular structure of [Zn(O₂CC₆H₄NO₂‐m)₂(pyridine)₂] exhibits a distorted N₂O₂ tetrahedral geometry; the molecule has two fold symmetry. Copyright © 2005 John Wiley & Sons, Ltd.     

Crystallographic report: Diazido[bis(2‐pyridyl)amine]zinc(II) hydrate, [Zn(C10H9N3)2(N3)2]·H2O

In mononuclear [Zn(C₁₀H₉N₃)₂(N₃)₂]·H₂O, the zinc atom has an approximate octahedral geometry, coordinated with four pyridyl nitrogen atoms derived from two bis(2‐pyridyl)amine molecules and two terminal nitrogen donors of the azide anions. Hydrogen‐bonding interactions extend this structure to form a double‐layer architecture. Copyright © 2004 John Wiley & Sons, Ltd.     

Crystallographic report: Bis[bis(N,N‐dibenzyldithiocarbamato)zinc(II)](4,4′‐bipyridine)

The centrosymmetric structure of {Zn[S₂CN(CH₂Ph)₂]₂}₂(4,4′‐bipy) features chelating dithiocarbamate ligands so that a trigonal bipyramidal NS₄ coordination geometry for zinc results. Copyright © 2003 John Wiley & Sons, Ltd.     

Crystallographic report: Diaqua(benzene‐1,4‐dioxyacetate)zinc(II): a one‐dimensional zigzag chain

The zinc(II) atom in the crystal structure of the title coordination polymer, [Zn(p‐BDOA)·2H₂O]_n (p‐BDOA^2? = benzene‐1,4‐dioxyacetate), exists in a distorted trigonal prismatic geometry. Adjacent zinc(II) ions are linked by the p‐BDOA^2? ligands to furnish a one‐dimensional (1‐D) zigzag chain. A three‐dimensional (3‐D) network structure is stabilized by extended hydrogen bonds. Copyright © 2004 John Wiley & Sons, Ltd.     

Crystallographic report: Bis(acetato‐O,O′){4‐[N,N‐bis(2‐cyanoethyl)amino] pyridine}bis(methanol)cadmium(II), [Cd(C11H12N4) (CH3CO2)2(CH3OH)2]

The cadmium atom is coordinated in distorted pentagonal bipyramidal geometry by the pyridine‐nitrogen atom of the 4‐[N,N‐bis(2‐cyanoethyl)amino]pyridine ligand, two oxygen atoms of two methanol molecules and four oxygen atoms of two acetate groups. Copyright © 2005 John Wiley & Sons, Ltd.     

Crystallographic report: Bis(N,N‐dibenzyldithiocarbamato)zinc(II)

The structure of Zn[S₂CN(CH₂Ph)₂]₂ features, in contrast to many related analogues, a mononuclear species with two chelating dithiocarbamate ligands that form a distorted tetrahedral array around the zinc centre; the molecule has two‐fold symmetry. Copyright © 2004 John Wiley & Sons, Ltd.