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Pincer Ligand. Seeking Redox Activity in a Tetrazinyl Pincer Ligand. Various synthetic methods have. Pincers tridentate ligands that prefer a meridional geometry are a rising class because of their distinctive combination of properties. Keywords Group transfer Metal-ligand cooperativity Phosphorus Pincer ligand Redox active.
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The PONOP pincer ligand has been utilized to stabilize various metal complexes and for example has enabled the detailed study of dihydrogen complexes of Rh and Ir 10 σ-alkane complexes 11 and more recently photolytic N 2 reduction to NH 3 using Re. An unusualfeature of the PNN ligand is that an anionic center is located in the arm not in the core of the ligandlike in majority of monoanionic pincers and thus is positioned cis to the incoming substrate. Seeking Redox Activity in a Tetrazinyl Pincer Ligand. The novel NNNH3 pincer-type ligand was characterized by multinuclear and multidimensional NMR HRMS and X-ray crystallography. For the synthesis of the 16 octahedral pincer-complexes a one-pot reaction was used with the related mononuclear ironII complexes with methanol as axial ligands as. A new class of CCC X 3-donor pincer ligand for transition metals has been constructed via cyclometalation of a 26-di-p-tolylphenyl Ar Tol 2 derivative.
Keywords Group transfer Metal-ligand cooperativity Phosphorus Pincer ligand Redox active.
The reaction of the lithium complex prepared from the pincer ligand with RhCl CO 2 2 gave the corresponding rhodium I carbonyl complex. Pincer ligand complexes of rhodium and iridium as catalysts for the dehydrogenation of alkfnes are receiving widespread attention. A novel monoanionic CNCtype pincer ligand featuring a pyrrolide as a central donor and imidazo 15 a pyridin3ylidenes as arm donors is designed and synthesized. For the synthesis of the 16 octahedral pincer-complexes a one-pot reaction was used with the related mononuclear ironII complexes with methanol as axial ligands as. Pincer complexes which are transition-metal complexes containing a terdentate monoanionic ligand composed of an anionic carbon atom and two mutually compatible donor sites have received considerable attention as catalysts in synthetic organic chemistry and as functional organometallic compounds in the field of materials science 19. The synthesis of the pincer-ligand bpeb was carried out as described in the literature 16 17For the synthesis of the octahedral pincer-complexes a one-pot reaction was used with the related mononuclear ironII complexes with methanol as axial ligands as starting material 6 20As initial attempts with methanol as solvent were not successful in all cases ethanol and acetonitrile were.
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The novel NNNH3 pincer-type ligand was characterized by multinuclear and multidimensional NMR HRMS and X-ray crystallography. A modern definition of a pincer ligand is broadly accepted as a chelator that binds to three adjacent coplanar sites on the metal center. The organic ligand of compound 2 exhibits disorder in its periphery groups. For the synthesis of the 16 octahedral pincer-complexes a one-pot reaction was used with the related mononuclear ironII complexes with methanol as axial ligands as. Pincers tridentate ligands that prefer a meridional geometry are a rising class because of their distinctive combination of properties.
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