scholarly journals An S = 1/2 Iron Complex Featuring N2, Thiolate, and Hydride Ligands: Reductive Elimination of H2 and Relevant Thermochemical Fe–H Parameters

2018 ◽  
Vol 140 (20) ◽  
pp. 6374-6382 ◽  
Author(s):  
Nina X. Gu ◽  
Paul H. Oyala ◽  
Jonas C. Peters
Keyword(s):  
Reductive Elimination ◽  
Iron Complex ◽  
Hydride Ligands

Dihydride formation versus H2-elimination in the protonation of the heterobimetallic FePt complex (CO)3Fe(μ-H)(μ-PCy2)Pt(PEt3)2

1990 ◽  
Vol 68 (6) ◽  
pp. 869-874 ◽  
Author(s):  
Hilary A. Jenkins ◽  
Stephen J. Loeb ◽  
David G. Dick ◽  
Douglas W. Stephan
Keyword(s):  
Crystal Structure ◽  
Infrared Spectroscopy ◽  
Structure Determination ◽  
Reductive Elimination ◽  
Space Group ◽  
X Ray ◽  
Hydride Complex ◽  
H Nmr ◽  
H2 Elimination ◽  
Hydride Ligands

The reaction of Li[Fe(CO)4(PCy2)] with trans-PtCl(H)(PEt3)2 results in the formation of the hydride complex (CO)3Fe((μ-H)((μ-PCy2)Pt(PEt3)2, 1. This heterobimetallic, phosphido-bridged complex reacts with one equivalent of HBF4•Et2O to give the complex [(CO)3Fe(μ-H)2((μ-PCy2)Pt(PEt3)2][BF4], 2, which contains two bridging hydride ligands. This species is isolated and fully characterized by 31P{1H} and 1H NMR and infrared spectroscopy. In contrast, 1 reacts with one equivalent of HCl•DMA (DMA = dimethylacetamide) to give the complex (CO)3ClFe(μ-PCy2)Pt(PEt3)2, 3. This species is the result of oxidative addition of HCl with subsequent reductive elimination of H2(g). This complex is fully characterized by 31P{1H} and 1H NMR, infrared spectroscopy and an X-ray crystal structure determination. 3 crystallizes in the space group [Formula: see text] with a = 10.037(4) Å, b = 10.644(3) Å, c = 17.137(9) Å, α = 102.80(3)°, β = 76.74(3)°, γ = 103.99(3)°, V = 1702(1) Å3, and Z = 2. The structure was refined to R = 2.54% and Rw = 2.73% for 4056 reflections with Fo2 > 3σ(Fo2). Keywords: heterobimetallic, hydride, phosphide, protonation.

Carbon Monoxide Induced Reductive Elimination of Disulfide in an N-Heterocyclic Carbene (NHC)/ Thiolate Dinitrosyl Iron Complex (DNIC)

2013 ◽  
Vol 135 (22) ◽  
pp. 8423-8430 ◽  
Author(s):  
Randara Pulukkody ◽  
Samuel J. Kyran ◽  
Ryan D. Bethel ◽  
Chung-Hung Hsieh ◽  
Michael B. Hall ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Reductive Elimination ◽  
Iron Complex ◽  
Dinitrosyl Iron Complex ◽  
Dinitrosyl Iron

The Role of the Interaction between Fe(III) and Cell Surface in the Accumulation of 67Ga by Tumor Cells

1991 ◽  
Vol 30 (06) ◽  
pp. 290-293 ◽  
Author(s):  
P. Maleki ◽  
A. Martinezi ◽  
M. C. Crone-Escanye ◽  
J. Robert ◽  
L. J. Anghileri
Keyword(s):  
Cell Surface ◽  
Tumor Cells ◽  
Ionic Composition ◽  
Iron Complex ◽  
Iron Binding ◽  
Complex Time ◽  
Interaction Product ◽  
Thermodynamic Constant ◽  
Number Of Cells

The study of the interaction between complexed iron and tumor cells in the presence of 67Ga-citrate indicates that a phenomenon of iron-binding related to the thermodynamic constant of stability of the iron complex, and a hydrolysis (or anion penetration) of the interaction product determine the uptake of 67Ga. The effects of various parameters such as ionic composition of the medium, nature of the iron complex, time of incubation and number of cells are discussed.

Reversible Oxidative-Addition and Reductive-Elimination of Thiophene from a Titanium Complex and Its Thermally-Induced Hydrodesulfurization Chemistry

2019 ◽  
Author(s):  
Alejandra Gomez-Torres ◽  
J. Rolando Aguilar-Calderón ◽  
Carlos Saucedo ◽  
Aldo Jordan ◽  
Alejandro J. Metta-Magaña ◽  
...  
Keyword(s):  
Dft Calculations ◽  
Ring Opening ◽  
Thiophene Ring ◽  
Oxidative Addition ◽  
Reductive Elimination ◽  
Thermally Induced ◽  
Titanium Complex

<p>The masked Ti(II) synthon (<sup>Ket</sup>guan)(<i>η</i><sup>6</sup>-Im<sup>Dipp</sup>N)Ti (<b>1</b>) oxidatively adds across thiophene to give ring-opened (<sup>Ket</sup>guan)(Im<sup>Dipp</sup>N)Ti[<i>κ</i><sup>2</sup>-<i>S</i>(CH)<sub>3</sub><i>C</i>H] (<b>2</b>). Complex <b>2</b> is photosensitive, and upon exposure to light, reductively eliminates thiophene to regenerate <b>1</b> – a rare example of early-metal mediated oxidative-addition/reductive-elimination chemistry. DFT calculations indicate strong titanium π-backdonation to the thiophene π*-orbitals leads to the observed thiophene ring opening across titanium, while a proposed photoinduced LMCT promotes the reverse thiophene elimination from <b>2</b>. Finally, pressurizing solutions of <b>2 </b>with H<sub>2</sub> (150 psi) at 80 °C leads to the hydrodesulfurization of thiophene to give the Ti(IV) sulfide (<sup>Ket</sup>guan)(Im<sup>Dipp</sup>N)Ti(S) (<b>3</b>) and butane. </p>

S(IV)–Mediated Unsymmetrical Heterocycle Cross-Couplings

2019 ◽  
Author(s):  
Min Zhou ◽  
Jet Tsien ◽  
Tian Qin
Keyword(s):  
Cross Coupling ◽  
Reductive Elimination ◽  
Facile Synthesis ◽  
Trigonal Bipyramidal

<p>Herein we report a sulfur (IV) mediated cross-coupling for facile synthesis of heteroaromatic substrates. Addition of heteroaryl nucleophiles onto a simple, readily-accessible alkyl sulfinyl (IV) chloride allows formation of a trigonal bipyramidal sulfurane intermediate. Reductive elimination therefrom provides bis-heteroaryl products in a practical and efficient fashion. <br></p>

Carbon-Heteroatom Cross-Coupling via an Electronically Excited Nickel (II) Complex

2019 ◽  
Author(s):  
Randolph Escobar ◽  
Jeffrey Johannes
Keyword(s):  
Energy Transfer ◽  
Functional Groups ◽  
Cross Coupling ◽  
Reductive Elimination ◽  
Aryl Halides ◽  
Coupling Reactions ◽  
General Methodology ◽  
Cross Coupling Reactions ◽  
Electronically Excited ◽  
Energy Transfer Pathway

<div>While carbon-heteroatom cross coupling reactions have been extensively studied, many methods are specific and</div><div>limited to a set of substrates or functional groups. Reported here is a method that allows for C-O, C-N and C-S cross coupling reactions under one general methodology. We propose that an energy transfer pathway, in which an iridium photosensitizer produces an excited nickel (II) complex, is responsible for the key reductive elimination step that couples aryl halides to 1° and 2° alcohols, anilines, thiophenols, carbamates and sulfonamides.</div>

scholarly journals Helmet Phthalocyaninato Iron Complex as a Primary Drier for Alkyd Paints

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1220
Author(s):  
Jan Honzíček ◽  
Eliška Matušková ◽  
Štěpán Voneš ◽  
Jaromír Vinklárek
Keyword(s):  
Catalytic Performance ◽  
Mechanical Tests ◽  
Iron Complex ◽  
Kinetic Measurements ◽  
Time Resolved ◽  
Strong Activity ◽  
Vis Spectroscopy ◽  
Order Of Magnitude ◽  
Transparent Coatings ◽  
Time Resolved Infrared Spectroscopy

This study describes the catalytic performance of an iron(III) complex bearing a phthalocyaninato-like ligand in two solvent-borne and two high-solid alkyd binders. Standardized mechanical tests revealed strong activity, which appeared in particular cases at concentrations about one order of magnitude lower than in the case of cobalt(II) 2-ethylhexanoate, widespread used in paint-producing industry. The effect of the iron(III) compound on autoxidation process, responsible for alkyd curing, was quantified by kinetic measurements by time-resolved infrared spectroscopy and compared with several primary driers. Effect of the drier concentration on coloration of transparent coatings was determined by UV–Vis spectroscopy.

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