Download or read book Synthesis and Characterization of Nickel II Compounds with Sulfur Donor Ligands written by Li Zhou and published by . This book was released on 1995 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis and Characterization of Mixed Donor Ligands and Their Corresponding Metal Complexes written by Timothy Michael Erasmus Jugovic and published by . This book was released on 2017 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presented in this thesis is the synthesis and characterization of two new classes of mixed donor ligands, as well as several copper(II) and nickel(II) complexes. Chapter II details the synthesis and characterization of thiosemicarbazates, which are tridentate ONS (oxygen, nitrogen, sulfur) donor compounds. In Chapter III complexes of these thiosemicarbazate ligands with nickel(II) and copper(II) are prepared and characterized. Chapter IV discusses the synthesis and characterization of several different amidothiocrown and amidoazathiocrown ethers.
Download or read book Synthesis and Characterization of Nickel II Complexes of a Hydrotrispyrazolylborato Ligand and of the Thiosalicylato Ligand written by Weibin Chen and published by . This book was released on 1994 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis and Characterization of Nickel II Complexes of a Hydrotrispyrazolylborate Ligand and of Novel Phosphinetrithiol Ligands written by Weihong Zhang and published by . This book was released on 1990 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Coordination Polymers written by Stuart R. Batten and published by Royal Society of Chemistry. This book was released on 2009 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: The field of coordination polymer research is now vast, & one of the fastest growing areas of chemistry in recent times, with important work being done on a variety of different aspects. This book provides a broad overview of all the major facets of modern coordination polymer science in the one place.
Download or read book Synthesis and Characterization of Mixed ligand Nickel II Complexes Possessing a Hydrotrispyrazolylborato Ligand written by Subo Liao and published by . This book was released on 1992 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis Characterization and Reactivity of Nickel Complexes with N Donor Olefinic and Macrocyclic Ligands written by Lars Valentin and published by . This book was released on 2014 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis and Characterization of Metal Complexes with Sulfur and Nitrogen containing Ligands written by Claire MacLeod Ohman and published by . This book was released on 2001 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis and Study of Coordination Compounds of Cobalt Copper Palladium and Nickel with Polydentate Ligands Containing Sulfur written by Tatiana Straistari and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work focuses on the synthesis, the characterization and the catalytic evaluation in the reduction of protons into dihydrogen, of new complexes of Ni(II), Co(III), Cu(II) and Pd(II) based ligands Type thiosemicarbazone. The catalytically active species during the process of the proton reduction was studied by cyclic voltammetry and mechanisms were formulated on the basis quantum chemical calculation.The first chapter introduces the scientific context, the goals and the main objectives of this work. The second chapter concerns the synthesis and the characterization of the N2S2 ligands and their associated mononuclear complexes, Ni, Cu and Pd. The third chapter presents the synthesis and the characterization of binuclear Co and trinuclear Ni based on N2S2 ligand.Electrochemical studies of these complexes in DMF in the presence of a proton source (trifluoroacetic acid), allowed us to evaluate their catalytic efficiency. Our results show that Cu and Pd complexes have a specific irreversible wave for the reduction of protons, but decomposition is observed during electrolysis, which makes these uninteresting complexes for the reduction of protons.On the contrary, Ni and Co complexes showed an electrochemical stability and good catalytic performances. In particular, the new mononuclear Ni complex exhibits remarkable catalytic properties that rank it among the best catalysts for the reduction of protons reported in the literature. All this work provided a complete description of the electrochemical behavior of N2S2 thiosemicarbazone ligands complexed to transition metals. It allows considering future developments in improving the catalytic properties of these complexes.
Download or read book Synthesis and Characterization of Nickel II Complexes with 1 4 7 10 tetrabenzyl 1 4 7 10 tetraazacyclododecane written by George A. Kalligeros and published by . This book was released on 1971 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis and Characterization of Nickel Complexes with Relevance to Nickel Acireductone Dioxygenase and Nickel Superoxide Dismutase written by Margo Nicole Montgomery and published by . This book was released on 2012 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research presents an investigation of synthetic model complexes with relevance to the active site of Ni(II) acireductone dioxygenase (Ni-ARD) and Ni(II) superoxide dismutase (Ni-SOD). Acireductone dioxygenases (ARDs) are a unique set of enzymes found in the methionine salvage pathway that catalyze the oxidation reaction of acireductone (1, 2-dihydroxy-3-oxo-5-(methylthio)pent-1-ene). These enzymes share a common polypeptide sequence but bind different metal ions, Ni 2+ or Fe2+, at the active site. The Ni-ARD enzyme is responsible for the off pathway shunt in the pathway. Using the tridentate nitrogen donor ligands hydrotris(3,5-dimethyl-1-pyrazolyl)borate (Tp*) and the newly developed tris(1, 2-dimethyl-4-imadozyl)carbinol, (4-TIC Me, Me) several reactions involving the acireductone analog 2-hydroxy-1, 3-diphenylpropan-1, 3-dione and O2 were investigated for similarities to the Ni-ARD active site. Superoxide dismutases (SODs) play a key role in protecting cells against oxidative damage by regulating the cellular concentration of the superoxide radical (O2.- ) which is an unwanted byproduct of cellular metabolism. This process is accomplished by converting the superoxide radicals to hydrogen peroxide and molecular oxygen. Several small-molecule complexes were synthesized and characterized in an effort to model the reduced state of the Ni-SOD using the Tp* ligand. The structures for these complexes have been determined using X-Ray Crystallography.
Download or read book Nickel II and Cobalt II Complexes with 2 4 pentanedionate and Tetraamine Ligands written by Jeffrey Moler and published by . This book was released on 1982 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis Characterization and Biological Studies of Nickel Ii and Zinc Ii Complexes with Mono and Di Bromo Substituted Schiff Base Ligands written by Bussaba Pinchaipat and published by . This book was released on 2020 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transition metal complexes of nickel(II) and zinc(II) with 5-bromo- N -(8-quinolyl)salicylaldimine (HqsalBr, HL 1 ) and 3,5-dibromo- N -(8-quinolyl)salicylaldimine (HqsalBr 2 , HL 2 ) have been synthesized and successfully characterized using several techniques: IR, 1 H-NMR, mass spectrometry and thermogravimetric analysis (TGA). The molecular structures of nickel(II) and zinc(II) complexes with HL 2 were determined by single crystal X-Ray crystallography. Ligands HL 1 and HL 2 both act as a tridentate ligand and coordinate to metal ion center via deprotonated hydroxyl oxygen atom, nitrogen of azomethine functional group and nitrogen of quinoline substituent. The interaction of these complexes with DNA was investigated using calf thymus DNA (CT-DNA) in which the studies by electronic absorption and luminescence titrations reveal that DNA binding mode of the complexes is intercalation. All the synthesized complexes provide great values of binding constant (K b ) and these results are consistent with the quenching capability defined by quenching constant values (K q ). Amongst the synthesized complexes, zinc(II) with ligand HL 2 complex, [Zn(qsalBr) 2 ], exhibits the most superior ability in the interaction with CT-DNA and the verification mode of binding by the competitive reaction with ethidium bromide (EB) also indicates the strongest intercalation by such complex. Additionally, ligands and complexes were also examined in anti-lung cancer activity against A549 cell line and compared with standard compounds, Etoposide and Cisplatin.
Download or read book Synthesis and Characterization of Nickel and Copper Complexes of Oxazolidine Ligands written by Joseph L. Hedrick and published by . This book was released on 1990 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The synthesis and characterization of three novel ligands containing oxazolidine moieties has been performed. The synthesis of Cu2 complexes of the ligands were found to be straightforward yielding the desired product. Syntheses of the Ni2 complexes were not straight forward. Only one of the Ni2+ complexes could be isolated in a pure form. A partial hydrolysis product of another of the Ni-ligand complexes could be isolated."--Abstract.
Download or read book Synthesis and Characterization of Nickel Imine amine Complexes a Possible Model for Nickel Superoxide Dismutase written by Tom Muinde Mwania and published by . This book was released on 2012 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: Superoxide dismutases are ubiquitous enzymes that efficiently catalyze the disproportionation of superoxide radical anions to protect biological molecules from oxidative damage. Several SODs have been identified having different metals at their active sites. These include Mn SOD, Fe SOD, Cu/Zn SOD and, most recently, Ni SOD. The catalytic center of Ni SOD resides in the N-terminal active-site loop, where a Ni(II) is coordinated by the amine N of His-1, the amide N of Cys-2, and two thiolate S atoms of Cys-2 and Cys-6. In the oxidized form, Ni(III) adds the imidazole N of His-1 as an axial ligand. For the past decade, we have been developing methodology using 2, 2'-dithiodibenzaldehyde (DTDB) for the synthesis of metal complexes with mixed N/S coordination. We are reporting on the application of this methodology to the synthesis of model complexes for the active site of NiSOD, in which we have successfully synthesized and characterized three NiIIN2S2 complexes of imine/amine N donors: Ni(NNS)SPh (1), Ni(NNS)SPhNO2 (2) and Ni(NNS)StBu (3). These may be used as a model for reduced NiSOD, with future plans of comparing to complexes with amide/amine N donors, thus establishing the role of the amide.
Download or read book Nickel II Complexes of Some Unusual Tetradentate Ligands Containing Nitrogen and Sulfur Donors written by Major Curt Thompson and published by . This book was released on 1961 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metal Complexes in Cancer Chemotherapy written by Bernhard K. Keppler and published by Wiley-VCH. This book was released on 1993-07-01 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a critical overview of the present status of metal complexes in cancer chemotherapy. Interdisciplinary in approach, the book covers both clinical and experimental aspects of the subject. Topics treated in depth include: - synthesis of metal complexes for cancer chemotherapy - metal complexes in clinical and preclinical trials - the mechanism of action of tumour-inhibiting metal complexes Oncologists and internists as well as researchers and students in organic chemistry, coordination chemistry, biochemistry and biology will find this up-to-date monograph highly valuable in their daily work.
