553-72-0Relevant academic research and scientific papers
Use of emanation thermal analysis and evolved gas analysis in thermal study of zinc(II) benzoate complex compounds
Findoráková, Lenka,Gy?ryová, Katari?na,Ve?erníková, Eva,Balek, Vladimír
, p. 765 - 769 (2009)
Thermal behaviours of three zinc(II) benzoate complex compounds (two new with caffeine and urea), namely Zn(C6H5COO)2, Zn(C6H5COO)2?caf2, Zn(C 6H5COO)2
Zn(II) Curcuminate Complexes with 2,20-bipyridine and Carboxylates
Grabner, Sabina,Modec, Barbara
, (2019)
Two novel zinc(II) compounds with curcuminate (abbreviated as cur?), [Zn(CH3COO) (cur)(bpy)](1)·CH3OH·2H2O (bpy = 2,20-bipyridine) and [Zn(PhCOO)(cur)(bpy)] (2)·CH3OH, have been synthesized and characterized. The ir composition has been determined by single-crystal X-ray structure analysis. Complexes 1 and 2 are similar: in both a five-fold coordination environment of zinc(II) consists of a monodentate carboxylate, a chelating bidentate 2,20-bipyridine, and curcuminate, which is bound via a deprotonated 1,3-dione moiety. In 1, 2,20-bipyridine nitrogen atoms and curcuminate oxygen atoms form the base of a square pyramid, whereas the acetate oxygen occupies its apex. The O3N2 donor set in 2 defines a polyhedron which more closely resembles a trigonal bipyramid. The packing in the crystal lattices of both compounds is governed by hydrogen-bonds. Complexes 1 and 2 display higher stability than curcumin in buffered media at pH = 7.0, however, the degradation of coordinated cur? is comparable to that of yellow pigment curcumin (curH) when the pH is raised to 7.2. Both complexes 1 and 2 in DMSO exhibit fluorescence with Stokes shifts of 5367 and 4634 cm?1, respectively.
Vibrational spectra and antimicrobial activity of selected bivalent cation benzoates
Borawska,Koczoń,Piekut,?wis?ocka,Lewandowski
, p. 284 - 289 (2009)
Selected bands of FT-IR spectra of Mg(II), Ca(II), Cu(II) and Zn(II) benzoates of both solid state and water solution, were assigned to appropriate molecular vibrations. Next evaluation of electronic charge distribution in both carboxylic anion and aromat
Synthesis and crystal structure of two zinc-containing complexes of triethanolamine
Kondratenko,Fundamensky,Ignatyev,Zolotarev,Kochina,Ugolkov
, p. 176 - 183 (2017)
Two new zinc-containing complexes [Zn2(TEA)(C6H5COO)3] (1) and ([Zn(TEA)(H2O)2]SO4)·H2O (2) were synthesized and characterized by IR spectroscopy, elemental analysis, DSC and TG analysis. Their structure was determined by single-crystal X-ray diffraction. In the binuclear, mixed-ligand [Zn2(TEA)(C6H5COO)3] complex, one zinc atom is six-coordinated by nitrogen and three oxygen atoms of tetradentate triethanolamine (TEA) and two oxygen atoms of two different benzoate ligands, forming the distorted octahedron of the ZnNO5 type. The second zinc atom is five-coordinated, forming the distorted trigonal bipyramid. Two zinc atoms are bridged by two carboxylate groups of two benzoate ligands and one oxygen atom of the deprotonated hydroxyethyl group of TEA. Cationic complex 2 consists of [Zn(TEA)(H2O)2]2+ cations and SO42? anions. The coordination polyhedron around the zinc atom corresponds to a distorted octahedron (ZnNO5 type). The TEA ligand is tetradentately coordinated to the cation, forming three chelate rings. The coordination sphere of the Zn cation is completed by two aqua ligands.
Comparison on thermal decomposition of propionate, benzoate and their chloroderivative salts of Zn(II)
Skorsepa,Godocikova,Cernak
, p. 773 - 780 (2004)
The thermal decompositions of propionates, benzoates Zn(II), their chloroderivate and complexes with thiourea have been studied by the means of TG, DTG, DTA, IR and XRD-powder diffraction methods. The investigated decompositions are compared and the resul
N-heterocyclic carbene complexes of Zn(II): Synthesis, X-ray structures and reactivity
Wang, Dongren,Wurst, Klaus,Buchmeiser, Michael R.
, p. 2123 - 2130 (2004)
The synthesis of six novel zinc (II) mono(N-heterocyclic carbene) complexes is described. 1,3-Bis(mesityl)-imidazol-2-ylidene was reacted with the zinc salts ZnX2 (X=Cl, CH3COO, PhCOO, and PhCH2COO) to yield the corresponding monomeric Zn-NHC complex ZnCl2(NHC)(THF) (1) and dimeric [Zn(OOCCH3)2(NHC)]2 (2), [Zn(OOCPh)2(NHC)]2 (3), [Zn(OOCCH2Ph)2(NHC)]2 (4) (NHC=1,3-bis(mesityl)-imidazol-2-ylidene). Reaction of 1 with 2 equivalents of silver trifluoromethanesulfonate yielded monomeric Zn(O3SCF3)2(NHC)(THF) (5), reaction of 1 with sodium {[R(+)-α-2-(1-phenyl-ethylimino)-methyl]- phenolate} yielded monomeric ZnCl(OC6H4- 2-CH=N(CHPhCH3)(NHC) (6). Compounds 1, 4-6 were structurally characterized by X-ray analysis. Selected compounds were investigated for their activity in the copolymerization of carbon dioxide with cyclohexene oxide as well as in the ring-opening polymerization of cyclohexene oxide and E-caprolactone.
Zn(II) and Cd(II) monomer, dimer and polymer compounds coordinated by benzoic acid and 4-acetylpyridine: Synthesis and crystal structures
Moreno-Gómez, Laura,Sánchez-Férez, Francisco,Calvet, Teresa,Font-Bardia, Mercè,Pons, Josefina
, (2020)
Reaction of MO (MO = Metal oxide, M = Zn(II) or Cd(II)) with benzoic acid (HBz) in H2O/MeOH mixture as solvent yields two benzoate compounds: [Zn(μ-Bz)2]n (1) and [Cd(Bz)2(H2O)3] (2). In addition, the reaction between M(MeCO2)2 (M = Zn(II) or Cd(II)) with HBz and 4-acetylpyridine (4-Acpy) in a 1:2:4 M ratio and in MeOH solution, leads to the formation of [Zn(μ-Bz)2(4-Acpy)]2 (3) and [Cd(μ-Bz)2(4-Acpy)2]2 (4). These four compounds have been fully characterized by analytical and spectroscopic techniques. Besides, their crystal structures have been elucidated revealing a 1D coordination polymer (1), a monomer (2), a paddle-wheel (3) and a dimer (4). In 1, the Zn(II) ion is four-coordinated in a tetrahedral geometry while in 3 is penta-coordinated in a square-pyramidal geometry. By contrast, compounds 2 and 4 exhibit seven-coordinated Cd(II) ions in a pentagonal-bipyramidal geometry. In these set of compounds, the benzoate ligand presents different coordination modes such as bidentate bridged (μ2-η1:η1) (1 and 3), chelate (μ1-η2) (2) and both bridged and chelate (μ2-η2:η1) (4). Besides, their extended structures have been analyzed. Finally, the UV–Vis and fluorescence spectra of all the compounds have been recorded as well as their quantum yields calculated.
Synthesis, characterization, photoluminescent and thermal properties of zinc(ii) 4′-phenyl-terpyridine compounds
Ma, Zhen,Lu, Wanbing,Liang, Baohuan,Pombeiro, Armando J. L.
, p. 1529 - 1537 (2013/06/05)
Reactions between 4′-phenyl-terpyridine (L) and several Zn(ii) salts (trifluoromethane sulfonate, p-toluenesulfonate, benzoate, p-hydroxybenzoate, o-hydroxybenzoate or m-hydroxybenzoate) led to the formation of the complexes [Zn(OSO2CF3)2L(H2O)] (1), [Zn(p-OSO2PhCH3)2L] (2), [Zn(OCOPh) 2L] (3), [Zn(p-OCOPhOH)2L] (4), [Zn(o-OCOPhOH) 2L] (5) and [Zn(m-OCOPhOH)2L] (6), which were characterized by elemental analysis, 1H NMR, 13C NMR, IR, single crystal X-ray diffraction and fluorescence spectroscopies. In 1, the Zn atom is hexacoordinated, with a N3O3 coordination environment, whereas in the remaining structures the metal atom is envisaged as possessing distorted N3O2 irregular trigonal bipyramidal coordination geometries. All the compounds show interesting photo-luminescent properties in solid and solution states in DMF, DMSO and methanol, which are reported along with their TG-DTA thermal decomposition processes.
Novel zinc(II) benzoate complex compounds with caffeine and urea synthesis and characterization
Findorakova, Lenka,Gyoryova, Katarina,Kovarova, Jana,Balek, V.,Nour El-Dien, F. A.,Halas, L.
, p. 923 - 928 (2012/03/07)
Novel zinc(II) complex compounds of general formula Zn(C6H 5COO)2·L2 (where L=caffeine (caf) and urea (u)) were synthesized and characterized by elemental analysis and IR spectroscopy. The thermal behaviour of the complexes was studied during heating in air by thermogravimetry. It was found that the thermal decomposition of the anhydrous Zn(II) benzoate compounds with bioactive ligands was initiated by the release of organic ligands at various temperatures. On further heating of the compounds up to 400°C the thermaldegradation of the benzoate anions took place. Zinc oxide was found as the final product of the thermal decomposition of all zinc(II) benzoate complex compounds heated to 600°C. Results of elemental analysis, in frared spectroscopy, mass spectroscopy and thermogravimetry are presented.
