scholarly journals A PAlP Pincer Ligand Bearing a 2-Diphenylphosphinophenoxy Backbone

Inorganics ◽  
2019 ◽  
Vol 7 (12) ◽  
pp. 140 ◽  
Author(s):  
Kazuhiko Semba ◽  
Ikuya Fujii ◽  
Yoshiaki Nakao
Keyword(s):  
Lewis Acidity ◽  
Pincer Ligand ◽  
Aluminum Complex ◽  
Heterobimetallic Complex ◽  
Heterobimetallic Complexes

A PAlP pincer ligand derived from 2-diphenylphosphino-6-isopropylphenol was synthesized. The Lewis acidity of the Al center of the ligand was evaluated with coordination of (O)PEt3. A zwitterionic rhodium-aluminum heterobimetallic complex bearing the PAlP ligand was synthesized through its complexation with [RhCl(nbd)]2. Moreover, reduction of the zwitterionic rhodium-aluminum complex with KC8 afforded heterobimetallic complexes bearing an X-type PAlP pincer ligand.

scholarly journals Phosphinosilylenes as a novel ligand system for heterobimetallic complexes

2016 ◽  
Vol 52 (32) ◽  
pp. 5523-5526 ◽  
Author(s):  
Nora C. Breit ◽  
Carsten Eisenhut ◽  
Shigeyoshi Inoue
Keyword(s):  
Heterobimetallic Complex ◽  
Heterobimetallic Complexes ◽  
Ligand System

The first heterobimetallic complexes comprising interconnected silylene and phosphine donors are reported. In a stepwise fashion, first the silylene coordinates to iron and subsequently the phosphine coordinates to tungsten. Another heterobimetallic complex can be obtained by the insertion of platinum into the P–H bond.

scholarly journals Bimetallic iron–iron and iron–zinc complexes of the redox-active ONO pincer ligand

2016 ◽  
Vol 7 (2) ◽  
pp. 1594-1599 ◽  
Author(s):  
Janice L. Wong ◽  
Robert F. Higgins ◽  
Indrani Bhowmick ◽  
David Xi Cao ◽  
Géza Szigethy ◽  
...  
Keyword(s):  
Zinc Complexes ◽  
Magnetic Studies ◽  
Pincer Ligand ◽  
Heterobimetallic Complexes ◽  
Redox Active ◽  
Iron Iron

Synthetic and magnetic studies of homo- and heterobimetallic complexes of the redox-active ONO pincer ligand.

scholarly journals “Masked” Lewis-acidity of an aluminum α-phosphinoamide complex

2017 ◽  
Vol 46 (11) ◽  
pp. 3601-3610 ◽  
Author(s):  
Harmen S. Zijlstra ◽  
Jürgen Pahl ◽  
Johanne Penafiel ◽  
Sjoerd Harder
Keyword(s):  
Lewis Acidity ◽  
Aluminum Complex

An aluminum complex with a bulky α-Ph2P-amide ligand is not sufficiently Lewis-acidic for activation of Cp*2ZrMe2 but reacts irreversibly as an Al/P FLP reagent with alkenes and other unsaturated substrates.

Rapid, Non-Toxic Synthesis of Beta Zeolites

2018 ◽  
Author(s):  
Felix Hemmann ◽  
Jonathan Hackebeil ◽  
Andreas Lißner ◽  
Florian Mertens
Keyword(s):  
Hydrofluoric Acid ◽  
Molecular Sieves ◽  
Toxic Chemicals ◽  
Lewis Acidity ◽  
Beta Zeolite ◽  
Seeded Growth ◽  
Related Research ◽  
Beta Zeolites ◽  
Growth Method ◽  
Fast Synthesis

Molecular sieves with beta zeolite topology are promising catalysts for various reactions as they exhibits extraordinary Lewis acidity. However, their industrial application and related research in academica is hindered because their synthesis is time consuming and typically involves toxic chemicals as hydrofluoric acid. Therefore, tetraethylammonium fluorid was tested as a non-toxic fluotide source for the synthesis of beta zeolites. In combination with the previously reported nano-seeded growth method, a fast synthesis of beta zeolites only involving non-toxic chemicals was possible. Synthesized zeolites show comparable selectivity in the Bayer-Villinger oxidation as conventional zeolites synthesized with hydrofluoric acid.<br>

Effect of Hydrated Metal Salts on the Coordination Product of Cobalt(II) halide and PNP Type Ligand, 2,6-bis(di-tertbutylphosphinomethyl) pyridine

2018 ◽  
Author(s):  
Tasneem Siddiquee ◽  
Abdul Goni
Keyword(s):  
Metal Salts ◽  
Molar Ratio ◽  
Pincer Complexes ◽  
Asymmetric Unit ◽  
X Ray Diffraction ◽  
Pincer Ligand ◽  
Tetrahedral Geometry ◽  
X Ray ◽  
Distorted Tetrahedral Geometry ◽  
Cobalt Center

Chemical treatment of CoX<sub>2</sub><b><sup>. </sup></b>6H<sub>2</sub>O (X = Cl, Br, I) with the potentially tridentate PNP pincer ligand 2,6-bis(di-<i>tert</i>-butylphosphinomethyl)pyridine in 1:1 molar ratio results in cobalt(II) halide-PNP pincer complexes. The effect of the hydrated metal source on molecular structure and geometry of the complexes was studied by single crystal X-ray diffraction analysis. The complexes are neutral and the cobalt center adopts a penta-coordinate system with potential atropisomerization. Within the unit cell there are two distinct molecules per asymmetric unit. One of the two phosphorus atoms in the PNP ligand was observed to be partially oxidized to phosphinoxide. Disorder in the structure reflects a mixture of square pyramidal and distorted tetrahedral geometry.

Chemistry of N-F Containing HEDM Materials and on Lewis Acidity of LiF

2000 ◽  
Author(s):  
Vandana Vij ◽  
Ashwani Vij ◽  
William W. Wilson ◽  
Karl O. Christe ◽  
Jeffery A. Sheehy
Keyword(s):  
Lewis Acidity

On a Quantitative Scale for Lewis Acidity and Recent Progress in Polynitrogen Chemistry

1999 ◽  
Author(s):  
Karl O. Christe ◽  
David A. Dixon ◽  
Douglas McLemore ◽  
William W. Wilson ◽  
Jeffrey A. Sheehy
Keyword(s):  
Recent Progress ◽  
Lewis Acidity

Zinc Sulfamate Catalyzed Efficient Selective Synthesis of Benzimidazole Derivatives under Ambient Conditions

2019 ◽  
Vol 16 (9) ◽  
pp. 740-749
Author(s):  
Sushil R. Mathapati ◽  
Arvind H. Jadhav ◽  
Mantosh B. Swami ◽  
Jairaj K. Dawle
Keyword(s):  
Benzimidazole Derivative ◽  
Sulfamic Acid ◽  
Aromatic Aldehydes ◽  
Catalytic Amount ◽  
Product Yield ◽  
Lewis Acidity ◽  
Benzimidazole Derivatives ◽  
Ambient Conditions ◽  
Reaction Condition ◽  
Green Approach

Zinc sulfamate (Zn(NH2SO3)2 is a derivative of sulfamic acid (H3NSO3) which possesses “Lewis acidity” and finds well suited in a number of catalytic applications. The present paper describes an efficient, eco-friendly, and clean synthesis of 2-substituted benzimidazole derivatives by reacting diverse o-phenylenediamine with various substituted aromatic aldehydes using a catalytic amount of zinc sulfamate in ethanol at ambient temperature. As a result, 10 mol.% of Zinc sulfamate catalyst showed 92% of respective product yield with 100% conversion using short reaction period in ethanol. Meanwhile, effect of reaction parameters, such as amount of catalyst, different solvents, and reaction temperature on reaction product, was also studied. In addition, in the optimized reaction condition various substituted biological important benzimidazoles derivatives were prepared by using optimized reaction condition in good to efficient yield. In addition, possible reaction mechanism in the presence of zinc sulfamate for the preparation of benzimidazole derivative was sketched and discussed. The present green approach showed significances with faster reaction rate with inexpensive catalyst, which showed excellent and clean yield of benzimidazole in mild reaction condition with easy work-up procedure.

scholarly journals Controlling surface chemistry and mechanical properties of metal ionogels through Lewis acidity and basicity

2021 ◽  
Vol 9 (8) ◽  
pp. 4679-4686
Author(s):  
Coby J. Clarke ◽  
Richard P. Matthews ◽  
Alex P. S. Brogan ◽  
Jason P. Hallett
Keyword(s):  
Mechanical Properties ◽  
Ionic Liquids ◽  
Ethylene Glycol ◽  
Surface Chemistry ◽  
Lewis Acidity ◽  
Metal Species ◽  
Poly Ethylene Glycol ◽  
Acidity And Basicity ◽  
Poly Ethylene

Gels prepared from metal containing ionic liquids with cross-linked poly(ethylene glycol) have surface compositions and mechanical properties that can be controlled by Lewis basicity and acidity of the metal species.

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