Download or read book Low Valent Late Transition Metal Complexes with Sulfoxide and Nitrogen Ligands written by Reto Dorta and published by . This book was released on 2002 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Redox Chemistry of Late Transition Metal Complexes written by Kei Fuchigami and published by . This book was released on 2017 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Novel Chemistry of Low valent Early Transition Metal Complexes written by Mikhail Victorovich Barybin and published by . This book was released on 1999 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Oxygen Ligands in Low valent Transition Metal Complexes written by H. M. Griffiths and published by . This book was released on 1973 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Synthesis and Reactivity of Low Valent Transition Metal Alkoxides and Related Compounds written by Kathryn Mary Sanchez and published by . This book was released on 1988 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Investigations of Low valent Transition Metal Complexes Containing Metal metal Bonds written by Linda Sue Benner and published by . This book was released on 1978 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Synthesis Structure and Reactivity of the Later Transition Metal Complexes Containing a Multidentate Phosphorus nitrogen Hybrid Ligand written by Steven Michael Fornara Kennedy and published by . This book was released on 2000 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Transition Metal Complexes of Neutral Eta1 Carbon Ligands written by Remi Chauvin and published by Springer Science & Business Media. This book was released on 2010-01-12 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is part of a series that gives the broad scientific readership a comprehensive summary and critical overview of specific topics in the field of organometallic chemistry. This text focuses on transition metal complexes of neutral eta1-carbon ligands.

Download or read book Mono and Dinuclear Late Transition Metal Complexes Based on Phosphorus and Nitrogen Ligands written by Esther Karoline van den Beuken and published by . This book was released on 1997 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: Zsfassung in niederländ. Sprache.

Download or read book Low valent Group 14 Metal Containing Ligands written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Reactivity of the Five coordinate Transition Metal Complexes Toward Oxygen Carbon Monoxide and Nitrogen written by Vahdat Jahed and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In biological systems, O2 interaction with iron centers in enzyme structure occurs during respiration and the metabolic process. To fully understand the interaction mechanism, each step of the O2 reduction process is important and needs to be characterized. To this goal, we have synthesized and characterized a series of cationic five-coordinate iron complexes, [FeII(L)(L')]+ where L is TpMe, Me = hydrotris{3,5-dimethylpyrazol-1-yl}borate; TpPh, Me = hydrotris{3-phenyl-5-methylpyrazol-1-yl}borate; L'= 2,2'-bipyridine; 4,4'-dimethoxy-2,2'-bipyridine; 4,4'-dimethyl-2,2'-bipyridine; 4,4′-bis(trifluoromethyl)-2,2′-bipyridine; 4,4'-dibromo-2,2'-bipyridine. These complexes were utilized to activate O2 to isolate iron-oxygen intermediate species. The electronic spectra indicate intense absorption at 390 nm consisting of O2 binding to the mononuclear iron complex that generates an iron oxygen intermediate. In addition, the effect of the ligand on the stability of the potential intermediate was studied by altering the ligand substitute. We also treated the high-spin iron(II) reaction with CO to generate the corresponding adduct of low-spin iron(II). 1HNMR analysis reveals a diamagnetic complex arising from a spin-state change from S = 2 to S = 0. Furthermore, infrared spectroscopy has been used to support CO binding empirically. In chapter 3, my research studies nitrene chemistry. Nitrenes are chemically analogous to a single oxygen atom (i.e., NR vs. O). Therefore, nitrene can insert into other chemical bonds. Such reactivity can install synthetically valuable carbon-nitrogen bonds into hydrocarbon substrate. Affording shorter routes to high-value commodity chemicals. However, free nitrenes are generated with difficulty and often display rapid and unselective reactivity. Some degree of control can be achieved through the coordination of nitrene within the ligand field of a metal complex. Structural and electronic modifications affect nitrene reactivity and enable catalyst optimization by characterizing reactive intermediates. We provided a rare example of an octahedral high valent iron imido complex. In chapter 4, polydentate ligand systems have been used to synthesize a new series of late first-row transition metal complexes. We employed Tp hydrotris(pyrazolyl)borates and Bp hydrobis(pyrazolyl)borates to synthesize five-coordinate complexes, [(L)M(L')] where (L is TpPh, Me, TpMe, Me; L'= BpPh, Me, BpH, H; and M= Fe, Co, Ni) to investigate their coordination chemistry. Various sterically hindered ligand systems show an interesting effect on the ligand orientation in the complex structure.

Download or read book New Transition Metal Complexes with Chelating Nitrogen Ligands written by Sarah Al-Benna and published by . This book was released on 2000 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Some Reactions of Low valent Transition Metal Complexes written by D. C. Wood and published by . This book was released on 1969 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book New Types of Transition Metal Complexes with Redox Active Sulfur and Nitrogen based Ligands written by Bradley William Smucker and published by . This book was released on 2002 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Transition Metal Complexes of Phosphorus Arsenic and Antimony Ligands written by Charles Andrew McAuliffe and published by John Wiley & Sons. This book was released on 1973 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Transition Metal Complexes with Multidentate Phosphorous nitrogen Ligands Synthesis Characterization and Reactivity written by Sergio Santiago Rozenel and published by . This book was released on 2011 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract Transition metal complexes with multidentate phosphorous/nitrogen ligands. Synthesis, characterization and reactivity. By Sergio Santiago Rozenel Doctor in Philosophy in Chemistry University of California, Berkeley Professor John Arnold, Chair Chapter 1: Chromium complexes supported by the multidentate monoanionic ligand [N2P2] {H[N2P2] = tBuN(H)SiMe2N(CH2CH2PiPr2)2} are presented, and the activity of these complexes towards ethylene oligomerization/polymerization is examined. The complexes [N2P2]CrCl2 (1) and [N2P2]CrCl (2) polymerized ethylene after activation with MAO. Derivatives of 1 and 2 were synthesized in order to gain insights about the active species in the ethylene oligomerization/polymerization processes. The alkyl complexes [N2P2]CrMe (3), [N2P2]CrCH2SiMe3 (4) and [N2P2]Cr(Cl)CH2SiMe3 (5), the cationic species {[N2P2]CrCl}BF4 (7), {[N2P2]CrCl}BPh4 (8) and {[N2P2]CrCH2SiMe3}BF4 (9), and the Cr(II) complex [N2P2]CrOSO2CF3 (11) were not active ethylene oligomerization/polymerization catalysts in absence of an activator. Reaction of 1 with two equivalents of MeLi led to reduction to 3. However, with one equivalent of MeLi the stable mixed alkyl-halide derivative [N2P2]Cr(Cl)Me (6) was obtained. Reaction of 2 with Red-Al® produced the hydride ([N2P2]Cr)2(ì-H)2 (10), which reacted with CO to produce the Cr(I) complex [N2P2]Cr(CO)2 (12). Reduction of 2 with KC8 in the presence of p-tolyl azide produced the dimeric cis μ-imido ([N2P2]Cr)2(ì-NC7H7)2 (13). A similar reduction in the presence of ethylene resulted in the isolation of the Cr(III) metallacyclohexane compound [N2P2]CrC4H8 (14). Chapter 2: A series of Co, Ni and Cu complexes with the ligand HN(CH2CH2PiPr2)2 (HPNP) has been isolated and their electrochemical behavior investigated by cyclic voltammetry. The nickel complexes [(HPNP¬)NiOTf]OTf and [(HPNP)NiNCCH3](BF4)2 display reversible reductions, as does the related amide derivative (NP2)NiBr. Related copper(I) and cobalt(II) derivatives were isolated and characterized. Addition of piperidine to [(HNP2)NiNCCH3](BF4)2 led to the formation of the new species [(HPNP)Ni(N(H)C(CH3)NC5H10)](BF4)2. Nucleophilic addition of piperidine to acetonitrile to produce HN=C(CH3)NC5H10 was catalyzed by [(HPNP)NiNCCH3](BF4)2. Chapter 3: A series of bimetallic ruthenium complexes [HPNPRu(N2)]2(μ-Cl)2](BF4)2 (2), [(HPNPRu(H2)Cl)2(μ-Cl)2](BF4)2 (3), [(HPNPRu)2(μ-H2NNH2)(μ-Cl)2](BF4)2 (4), [(HPNPRu)2(μ-Cl)2(μ-HNNPh)](BF4)2 (5), [HPNPRu(NH3)(ç2-N2H4)](BF4)Cl (6), [(HNP2Ru)2(μ-Cl)2(μ2-OSO2CF3)]OSO2CF3 (7), [HPNPRu]2(μ-Cl)3]BPh4 (8) and [HPNPRu]2(μ-Cl)3]BF4 (9) were isolated and characterized in the course of reactions aimed at studying the reduction of N2 and hydrazine. Complex 4 produces ammonia catalytically from hydrazine, and complex 2 generates ammonia upon reaction with Cp2Co/HLuBF4. DFT calculations support the idea that the diazene complex formed is more stable than the expected Chatt-type intermediate. Chapter 4: The reduction chemistry of cobalt complexes with the PNP ligand was explored. Reaction of (HPNP)CoCl2 (1) with n-BuLi generated the deprotonated Co(II) product (PNP)CoCl (2), and the Co(I) reduced species (HPNP)CoCl (3). The reaction of complex 2 with KC8 was investigated, where it was found that the products obtained depended upon the inert gas used to carry out the reaction: (PNP)CoN2 (4) under N2, bimetallic complex [(PNP)Co]2 (5) under Ar, and (HPNP)Co(H)3 (8) under H2. Complex 5 reacted with H2 to generate the bimetallic complex [(PNP)CoH]2 (6). With H2, H3SiPh and AgBPh4 complex 3 generated the species (HPNP)CoCl(H)2 (9), (HPNP)CoCl(H)SiH2Ph (10) and [(HPNP)CoCl]BPh4 (11) respectively. DFT calculations were performed to gain insights about the transformations observed.

Download or read book The Chemistry of Low valent Transition Metal and F element Complexes Supported by Five and Eight membered Carbocycles written by and published by . This book was released on 2007 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: