Benzo annulated cycloheptatriene PCP pincer iridium complexes

2014 ◽  
Vol 43 (32) ◽  
pp. 12187-12199 ◽  
Author(s):  
Wolfgang Leis ◽  
Sophie Wernitz ◽  
Benedikt Reichart ◽  
David Ruckerbauer ◽  
Johannes Wolfram Wielandt ◽  
...  
Keyword(s):  
Dft Calculations ◽  
Iridium Complexes ◽  
Pincer Complex ◽  
Pcp Pincer

Chemical conversions of a cycloheptatriene iridium pincer complex were studied by NMR and MS techniques as well as DFT calculations.

Reversible Ligand Protonation of a Mn(I) PCP Pincer Complex To Afford a Complex with an η2-Caryl–H Agostic Bond

2018 ◽  
Vol 37 (20) ◽  
pp. 3475-3479 ◽  
Author(s):  
Daniel Himmelbauer ◽  
Berthold Stöger ◽  
Luis F. Veiros ◽  
Karl Kirchner
Keyword(s):  
Pincer Complex ◽  
Pcp Pincer

Non-innocent PNN ligand is important for CO oxidation by N2O catalyzed by a (PNN)Ru–H pincer complex: insights from DFT calculations

2018 ◽  
Vol 47 (43) ◽  
pp. 15324-15330 ◽  
Author(s):  
Hujun Xie ◽  
Yutong Zhang ◽  
Chuyue Xiang ◽  
Yang Li ◽  
Ting Fan ◽  
...  
Keyword(s):  
Dft Calculations ◽  
Co Oxidation ◽  
Catalytic Cycle ◽  
Pincer Complex ◽  
Co Insertion ◽  
Three Stages

It was found that the catalytic cycle for CO oxidation by N2O proceeds in three stages: N2O activation to form a (PNN)Ru–OH intermediate, CO insertion into the Ru–OH bond to form a (PNN)Ru–COOH intermediate and CO2 release from (PNN)Ru–COOH.

High yield thiolation of iodobenzene catalyzed by the phosphinite nickel PCP pincer complex: [NiCl{C6H3-2,6-(OPPh2)2}]

2006 ◽  
Vol 47 (29) ◽  
pp. 5059-5062 ◽  
Author(s):  
Valente Gómez-Benítez ◽  
Oscar Baldovino-Pantaleón ◽  
Cesar Herrera-Álvarez ◽  
Rubén A. Toscano ◽  
David Morales-Morales
Keyword(s):  
High Yield ◽  
Pincer Complex ◽  
Pcp Pincer

Prototropic rearrangements in cycloheptatrienyl PCP pincer iridium complexes

2008 ◽  
pp. 527-532 ◽  
Author(s):  
Angelika M. Winter ◽  
Klaus Eichele ◽  
Hans-Georg Mack ◽  
William C. Kaska ◽  
Hermann A. Mayer
Keyword(s):  
Iridium Complexes ◽  
Pcp Pincer

scholarly journals Crystal structure of an iridium(III) complex of the [C(dppm)2] PCP pincer ligand system and its conjugate CH acid form

2018 ◽  
Vol 74 (5) ◽  
pp. 620-624 ◽  
Author(s):  
Christian Reitsamer ◽  
Inge Schlapp-Hackl ◽  
Gabriel Partl ◽  
Walter Schuh ◽  
Holger Kopacka ◽  
...  
Keyword(s):  
Carbon Atom ◽  
Iridium Complexes ◽  
Pincer Ligand ◽  
Single Crystal Diffraction ◽  
Dalton Trans ◽  
Ligand System ◽  
Distorted Octahedral ◽  
Major Interest ◽  
Carbonyl Bond ◽  
Pcp Pincer

After the successful creation of the newly designed PCP carbodiphosphorane (CDP) ligand [Reitsamer et al. (2012). Dalton Trans. 41, 3503–3514; Stallinger et al. (2007). Chem. Commun. pp. 510–512], the treatment of this PCP pincer system with the transition metal iridium and further the analysis of the structures by single-crystal diffraction and by NMR spectroscopy were of major interest. Two different iridium complexes, namely (bis{[(diphenylphosphanyl)methyl]diphenylphosphanylidene}methane-κ3 P,C,P′)carbonylchloridohydridoiridium(III) chloride dichloromethane trisolvate, [IrIII(CO){C(dppm)2-κ3 P,C,P′}ClH]Cl·3CH2Cl2 (1) and the closely related (bis{[(diphenylphosphanyl)methyl]diphenylphosphanylidene}methanide(1+)-κ3 P,C,P′)carbonylchloridohydridoiridium(III) dichloride–hydrochloric acid–water (1/2/5.5), [IrIII(CO){CH(dppm)2-κ3 P,C,P′)ClH]Cl}2 (2), have been designed and both complexes show a slightly distorted octahedral coordinated IrIII centre. The PCP pincer ligand system is arranged in a meridional manner, the CO ligand is located trans to the central PCP carbon and a hydride and chloride are located perpendicular above and below the P2C2 plane. With an Ir—CCDP distance of 2.157 (5) Å, an Ir—CO distance of 1.891 (6) Å and a quite short C—O distance of 1.117 (7) Å, complex 1 presents a strong carbonyl bond. Complex 2, the corresponding CH acid of 1, shows an additionally attached proton at the carbodiphosphorane carbon atom located antiperiplanar to the hydride of the metal centre. In comparison with complex 1, the Ir—CCDP distance of 2.207 (3) Å is lengthened and the Ir—C—O values indicate a weaker trans influence of the central carbodiphosphorane carbon atom.

A Practical Synthesis of Ammonia from Nitrogen Gas, Samarium Diiodide and Water Catalyzed by a Molybdenum–PCP Pincer Complex

Synthesis ◽  
2019 ◽  
Vol 51 (20) ◽  
pp. 3792-3795 ◽  
Author(s):  
Yuya Ashida ◽  
Shoichi Kondo ◽  
Kazuya Arashiba ◽  
Takamasa Kikuchi ◽  
Kazunari Nakajima ◽  
...  
Keyword(s):  
Atmospheric Pressure ◽  
Catalytic Amount ◽  
Practical Method ◽  
Samarium Diiodide ◽  
Ambient Conditions ◽  
Nitrogen Gas ◽  
Pincer Complex ◽  
Proton Source ◽  
Practical Synthesis ◽  
Pcp Pincer

A practical method for ammonia synthesis is described. The reaction of atmospheric pressure of nitrogen gas with samarium diiodide as a reducing reagent and water as a proton source in the presence of a catalytic amount of a molybdenum trichloride complex bearing a PCP [1,3-bis(di-tert-butylphosphinomethyl)benzimidazol-2-ylidene]-type pincer ligand occurs under ambient conditions to afford ammonium sulfate after treatment with sulfuric acid.

A highly active two six-membered phosphinite palladium PCP pincer complex [PdCl{C6H3(CH2OPPri)2-2,6}]

Polyhedron ◽  
2007 ◽  
Vol 26 (7) ◽  
pp. 1445-1448 ◽  
Author(s):  
Ali Naghipour ◽  
S.J. Sabounchei ◽  
David Morales-Morales ◽  
Daniel Canseco-González ◽  
Craig M. Jensen
Keyword(s):  
Highly Active ◽  
Pincer Complex ◽  
Pcp Pincer
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