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41.
de Oliveira Tamires D. Cabeza Natália A. da Silva Gelson T. S. T. Ruiz Ana L. T. G. Caires Anderson R. L. da Silveira Rafael G. Rodrigues Daniela C. M. Fiorucci Antônio R. dos Anjos Ademir 《Transition Metal Chemistry》2021,46(2):111-120
Transition Metal Chemistry - Lapachol is a natural naphthoquinone known for having a variety of biological properties, and in recent years, it has been used in the synthesis of metal complexes with... 相似文献
42.
Gelson Manzoni de Oliveira Prof. Dr. Lara Regina Soccol Gris Lenice de Lourenço Marques Ernesto Schulz Lang 《无机化学与普通化学杂志》2007,633(9):1326-1328
Sulfathiazole (HSTZ) reacts with triethylamine and Ni(CH3COO)2·4H2O in methanol and further with pyridine to give the sulfathiazolato complex [Ni(STZ)2(Py)2]·2Py. In the new chelate complex the deprotonated sulfonamidic nitrogen atom does not take part in the coordination process, apparently retaining the negative charge. Two (STZ)? moieties are symmetrically bonded to the Ni2+ ion through a thiazolyl nitrogen atom and an oxygen atom of the S(O)2 group. Two pyridine molecules accomplish the fairly distorted octahedral coordination at the metal centre. 相似文献
43.
Ernesto Schulz Lang Gelson Manzoni de Oliveira Davi Fernando Back Sailer Santos dos Santos 《无机化学与普通化学杂志》2004,630(5):730-734
The six‐membered ring Hg3Te3 of [Hg3Cl3(μ‐TePh)3]·2 DMSO {(Ph = C6H5; DMSO = (CH3)2SO} was opened by redissolution with DMSO, reacting with Co[Hg(SCN)4] and affording polymeric . The monoclinic novel compound belong to the space group P21/n and assembles in a bidimensional lattice tetrahedral HgII(SCN)2Te2‐ and octahedral CoII(NCS)4(DMSO)2‐chains linked trough SCN bridges along the crystallographic axis b and diagonally to the ac axes. The structure of [(DMSO)2Co(NCS)4(Hg—TePh)2]n is limited by the DMSO ligands in the axial positions of the Co‐octahedrons. 相似文献
44.
Gelson Manzoni de Oliveira Gleison Antonio Casagrande Eliandro Faoro Ramo Marceli Fernandes Jr. Peter Mayer Ernesto Schulz Lang 《无机化学与普通化学杂志》2003,629(9):1566-1568
[BrMn(CO)5] reacts with benzoylhydrazine in THF occurring substitution of two CO groups by a Metal‐ligand ring to give fac‐[Mn(Br)(CO)3(BHD)]·2THF (BHD = C6H5CONHNH2). The novel compound shows a distorted octahedral arrangement at the manganese atom, with three nearly linear carbonyl ligands in a fac arrangement, illustrating another example that the CO group in position trans to the bromine ligand in [BrMn(CO)5] presents the most intensive metal‐CO backbonding effect of all the CO groups of the parent complex, leading to the formation of a facial (and not meridional) isomer, even in the presence of a bidentate ligand like benzydrazide. X‐ray measures of yellow crystals showed that the title complex belong to space group P21/c, with the asymmetric unit containing one crystallographically independent [Mn(Br)(CO)3(BHD)] complex and two tetrahydrofurane solvate molecules. The new compound represents heretofore the unique occurrence of the complexing single bidentate ligand ‐O=C(Ph)‐N(H)‐N(H)2‐ with an octahedral coordination at the MnI atom supported chiefly by carbonyl groups. 相似文献
45.
Manfredo Hrner Gelson Manzoni de Oliveira Mariana Boneberger Behm Herton Fenner 《无机化学与普通化学杂志》2006,632(4):615-618
A solution of deprotonated 1,3‐bis(4‐bromophenyl)triazene reacts with Hg(CH3COO)2 in methanol / tetrahydrofurane to give yellow crystalline needles of {HgII[NNN(PhBr)2]2}n, a triazenide complex polymer of HgII with metal‐η2,η2‐arene π‐interactions, performed by coordinated single triazenide chains. The crystal structure of the new polymeric complex of HgII belongs to the monoclinic space group P21/n. The lattice of [HgII(BrPhNNNPhBr)2]n can be viewed as a one‐dimensional assembling of planar tectons [HgII(BrPhNNNPhBr)2] linked through metalocene alike HgII‐η2,η2‐arene π‐interactions along the crystallographic b axis. 相似文献
46.
Ernesto Schulz Lang Prof. Dr. Gelson Manzoni de Oliveira Prof. Dr. Greice Tabarelli 《无机化学与普通化学杂志》2008,634(3):416-418
Selenium and bromine were refluxed in methanol and stirred with ethylenethiourea to give yellow crystals of [(Se‐ettu)2]Br2 (ettu = ethylenethiourea). The first reported 1,2‐diselenonium dication stabilized by sulfur atoms is air unstable and yields a three‐dimensional lattice with Se+···Br?···Se+ bridges enclosing also single Se+···Br? interactions and H···Br? bonds. The air instability of [(Se‐ettu)2]Br2 probably is due to redox reactions which lead to the decomposition of ethylenethiourea with precipitation of sulfur. 相似文献
47.
Exploring Te–Te Bond Cleavage with Palladium(II): Synthesis,X‐ray Structural Characterization,and Optical Features of Tellurolate and Telluro‐Ether Complexes of Palladium(II)
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Bárbara Tirloni Camila Nunes Cechin Giovanny Ferro Razera Marcelo Barbalho Pereira Gelson Manzoni de Oliveira Ernesto Schulz Lang 《无机化学与普通化学杂志》2016,642(3):239-245
The focus of this study was to explore reactions of (RTe)2 with palladium(II) salts. These reactions led to Te–Te bond cleavage and the formation of three tellurolate‐bridged dinuclear complexes and a mononuclear telluro‐ether palladium(II) complex. The methodologies used yielded single source precursors for interesting materials. UV/vis spectroscopy results supported the measured optical bandgap for the complexes in the solid state. A study on the structure of all complexes in the solid state was carried out using single‐crystal X‐ray diffraction. Other analytical methodologies, such as elemental analysis and infrared spectroscopy, were also used for the characterization of the complexes. 相似文献
48.
Oxazolidine copper complexes: Synthesis,characterization and superoxide dismutase activity of copper(II) complexes with oxazolidine ligands derived from hydroxyquinoline carboxaldehyde
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Joice Ceolin Josiéli Demetrio Siqueira Francisco Mainardi Martins Paulo C. Piquini Bernardo A. Iglesias Davi F. Back Gelson Manzoni de Oliveira 《应用有机金属化学》2018,32(4)
This work describes the synthesis of copper(II) complexes, their identification using spectroscopic and electrochemical methods, structural characterization with X‐ray diffraction and density functional theory calculations (DFT), as well as their catalytic activity mimicking that of superoxide dismutase. Structural analysis revealed the formation of complexes with cyclization of ligands L1 and L2 with the formation of a heterocycle, 1,3‐oxazolidine. The DFT calculations confirmed this trend by stabilizing with lower energy. In addition, evaluations of mimetic enzymatic activity of complexes C1, C2, C3 and C4 revealed promising IC50 values compared to other results seen in the literature (IC50 = 0.22, 0.328, 0.55 and 0.92). Also, calf thymus DNA interactive experiments using UV–visible spectroscopy were conducted in the presence of the copper(II) complexes. 相似文献
49.
Rafael StielerFabrício Bublitz Ernesto Schulz Lang Gelson Manzoni de Oliveira 《Polyhedron》2012,31(1):596-600
The ligand dppmo2 [CH2{P(O)Ph2}2] (Ph = phenyl), MgCl2·6H2O, MgBr2, MgI2, FeBr2, CoBr2, NiBr2 and Hg(SePh)2 react one at a time to give the complex salt of the general formula [M(dppmo2)3][Hg4X4(SePh)6]·4dmf·H2O (M = Mg2+, Fe2+, Co2+, Ni2+; X = Cl, Br, I; dmf = dimethylformamide). The cations [M(dppmo2)3]2+ are predominantly octahedral with axial angles from 175° to 178°. The adamantane like anions [Hg4X4(SePh)6]2− are examples of single adamantanoid species, since these compounds normally appear as polymers or fused cages. Adamantanoid cages are the preferential thermodynamic configuration for this atomic aggregate. They appear as single molecules or ions however only in a halogen rich reactions milieu. 相似文献
50.
Raquel G. Jacob Luiz G. Dutra Cátia S. Radatz Samuel R. Mendes Gelson Perin Eder J. Lenardão 《Tetrahedron letters》2009,50(13):1495-369
A general and easy method for the synthesis of several 1,2-disubstituted benzimidazoles using SiO2/ZnCl2 and solvent-free conditions is described. This efficient and improved method furnishes selectively and in good yields the corresponding 1,2-bis(organyl)-benzimidazoles starting from o-phenylenediamine and aromatic or aliphatic aldehydes. The catalytic system was re-used up three times and the use of focused microwaves accelerates the reaction. 相似文献