Double Cyclometalation: Implications for C—H Oxidative Addition with PCP Pincer Compounds of Iridium

2004 ◽  
pp. 234-247 ◽  
Author(s):  
Hani A. Y. Mohammad ◽  
Jost C. Grimm ◽  
Klaus Eichele ◽  
Hans-Georg Mack ◽  
Bernd Speiser ◽  
...  
Keyword(s):  
Oxidative Addition ◽  
Pcp Pincer

Double Cyclometalation: Implications for C?H Oxidative Addition with PCP Pincer Compounds of Iridium

ChemInform ◽  
2005 ◽  
Vol 36 (7) ◽  
Author(s):  
Hani A. Y. Mohammad ◽  
Jost C. Grimm ◽  
Klaus Eichele ◽  
Hans-Georg Mack ◽  
Bernd Speiser ◽  
...  
Keyword(s):  
Oxidative Addition ◽  
Pcp Pincer

Oxidative Addition of Water by an Iridium PCP Pincer Complex:  Catalytic Dehydrogenation of Alkanes by IrH(OH){C6H3-2,6-(CH2PBut2)2}

2001 ◽  
Vol 20 (6) ◽  
pp. 1144-1147 ◽  
Author(s):  
David Morales-Morales ◽  
Do W. Lee ◽  
Zhaohui Wang ◽  
Craig M. Jensen
Keyword(s):  
Oxidative Addition ◽  
Catalytic Dehydrogenation ◽  
Pincer Complex ◽  
Pcp Pincer

Manganese and Iron PCP Pincer Complexes – The Influence of Sterics on Structure and Reactivity

2021 ◽  
Author(s):  
Wolfgang Eder ◽  
Daniel Himmelbauer ◽  
Berthold Stöger ◽  
Luis F. Veiros ◽  
Marc Pignitter ◽  
...  
Keyword(s):  
Oxidative Addition ◽  
Pincer Complexes ◽  
Pcp Pincer

The syntheses of various manganese and iron PCP pincer complexes via a solvothermal oxidative addition methodology is described. Upon reacting [Mn2(CO)10] with the ligands (P(C-Br)PCH2-iPr) (1a) and (P(C-Br)PO-iPr) (1b), Mn(I)...

Some Problems in the Oxidative Addition and Binding of an Ethylene to a Transition Metal Center.

1987 ◽  
Vol 6 (4) ◽  
pp. 902-902
Author(s):  
Jerome Silestre ◽  
Maria Calhorda ◽  
Roald Hoffman ◽  
Page Stoutland ◽  
Robert Bergman
Keyword(s):  
Transition Metal ◽  
Oxidative Addition ◽  
Metal Center

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>

Ni(0)-Catalyzed α-Allylic Alkylation of Regular Ketones with 1,3-Dienes under pH and Redox-neutral Conditions

2019 ◽  
Author(s):  
Tiantian Chen ◽  
Yang Yang ◽  
Liyu Xie ◽  
Haijian Yang ◽  
Guangbin Dong ◽  
...  
Keyword(s):  
Oxidative Addition ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Dual Role ◽  
Allylic Alkylation ◽  
Cross Coupling Reaction ◽  
Neutral Conditions

<p>We report a Ni(0)-catalyzed cross coupling reaction between simple ketones and 1,3-dienes. A variety of a-allylic alkylation products were formed in an 1,2-addition manner with excellent regioselectivity. Water was found to significantly accelerate this transformation. A HO-Ni-H species generated from oxidative addition of Ni(0) to H<sub>2</sub>O is proposed to play a “dual role” in activating both the ketone and the diene substrate.</p>

On the Reactivity of mRNA Caps: C-H Oxidative Addition of 7-Methylguanosine to Pt(0)

2019 ◽  
Author(s):  
Maria Ines Leitao ◽  
Carmen Gonzalez ◽  
Zuzanna Filipiak ◽  
Ana Petronilho
Keyword(s):  
Oxidative Addition ◽  
Carbene Complex ◽  
Proton Loss

<p>7-methylguanosine, the so-called mRNA cap 0 bears a very labile C8-H bond, due to the formation of an ylide/N-heterocyclic carbene, upon proton loss. The reaction of 7-methylguanosine with Pt(PPh3)4, via C-H oxidative addition, yields a hydrido–PtII carbene complex and this reactivity can be extrapolated to 7,9-dimethylguanine. </p>

Hydrogen-halide versus alkyl-halide oxidative addition in dimethyl platinum(II) complexes: Crystal structure of [PtBr2(bpy)]

2007 ◽  
Vol 360 (8) ◽  
pp. 2661-2668 ◽  
Author(s):  
Badri Z. Momeni ◽  
Saeideh Hamzeh ◽  
Simin S. Hosseini ◽  
Frank Rominger
Keyword(s):  
Crystal Structure ◽  
Alkyl Halide ◽  
Oxidative Addition ◽  
Hydrogen Halide
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