scholarly journals Synthesis, oligomerization and catalytic studies of a redox-active Ni4-cubane: a detailed mechanistic investigation

RSC Advances ◽  
2021 ◽  
Vol 11 (37) ◽  
pp. 22849-22858
Author(s):  
Saroj Kumar Kushvaha ◽  
Maria Francis ◽  
Jayasree Kumar ◽  
Ekta Nag ◽  
Prathap Ravichandran ◽  
...  
Keyword(s):  
Nickel Complex ◽  
Efficient Catalyst ◽  
Aromatic Heterocycles ◽  
Redox Active ◽  
Mechanistic Investigation

A robust tetrameric nickel complex [Ni4((Oal−)2L-Me)4(s)4] (s = solvent) with cubane-like Ni4O4 core topology identified as the efficient catalyst for the diastereoselective cyclopropanation of aromatic heterocycles.

A hybrid bioinspired catechol-alloxazine triangular nickel complex stabilizing protons and electrons

2021 ◽  
Author(s):  
Agnideep Das ◽  
Hannah Jobelius ◽  
Jules Schleinitz ◽  
Stefani Gamboa-Ramírez ◽  
Geordie Creste ◽  
...  
Keyword(s):  
Nickel Complex ◽  
Trinuclear Complex ◽  
Redox Active

We report the design of a unique bioinspired ligand merging redox-active catechol and flavin-related alloxazine substructures. Upon coordination with a Ni(II) salt, this hybrid ligand forms a trinuclear complex containing...

scholarly journals Redox activity of a dissymmetric ligand bridging divalent ytter-bium and reactive nickel fragments

2021 ◽  
Author(s):  
Ding Wang ◽  
Maxime Tricoire ◽  
Valeriu Cemortan ◽  
Jules Moutet ◽  
Grégory Nocton
Keyword(s):  
Nickel Complex ◽  
Bond Formation ◽  
Lanthanide Complex ◽  
Redox Activity ◽  
Trimeric Complex ◽  
Redox Active ◽  
Divalent Lanthanide

The reaction of a nickel complex bearing a redox-active dissymmetric ligand (Kbimpm) with a divalent lanthanide complex, Cp*2Yb(OEt2) affords an unprecedented, trimeric complex with C(sp3)–C(sp3) bond formation between two ligands in an exo position.

scholarly journals Kinetic and Mechanistic Investigation of Pyrano[2,3-d]pyrimidine Formation in the Presence of Catalyst under Novel One-Pot Three-Component Reaction

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Sayyed Mostafa Habibi-Khorassani ◽  
Malek Taher Maghsoodlou ◽  
Mehdi Shahraki ◽  
Sadegh Talaiefar ◽  
Jasem Aboonajmi
Keyword(s):  
Rate Constant ◽  
Reaction Times ◽  
Thiobarbituric Acid ◽  
Order Rate Constant ◽  
Second Order ◽  
One Pot ◽  
Efficient Catalyst ◽  
Order Rate ◽  
Mechanistic Investigation ◽  
Three Component Reaction

Sodium acetate was applied as an efficient catalyst for the one-pot, three-component condensation reactions consisting of 4-nitrobenzaldehyde 2, malononitrile 3, and thiobarbituric acid 1. Use of nontoxic reaction components, short reaction times, environmental, easy work-up, and high yields are some remarkable advantages of this method. Kinetics and mechanism of the reaction were spectrally studied and the second order rate constant (kovr = k1) was automatically calculated by the standard equations contained within the program. The second order rate constant [Ln(kovr = k1), Ln(kovr = k1)/T] that depended on reciprocal temperature was in good agreement with the Arrhenius and Eyring equations, respectively. This data provided the suitable plots for calculating the activation energy and parameters (Ea, ΔG‡, ΔS‡, and ΔH‡) of the reaction. Furthermore, from studying the effects of solvent, concentration, and catalyst on the reaction rate, useful information was obtained regarding the mechanism. The results showed that the first step of the reaction mechanism is a rate determining step (RDS). The proposed mechanism was confirmed in accordance with the experimental data and also the steady state approximation.

An abnormal N-heterocyclic carbene based nickel complex for catalytic reduction of nitroarenes

2016 ◽  
Vol 45 (17) ◽  
pp. 7421-7426 ◽  
Author(s):  
Gonela Vijaykumar ◽  
Swadhin K. Mandal
Keyword(s):  
Aromatic Amines ◽  
Nickel Complex ◽  
Catalytic Reduction ◽  
Efficient Catalyst

The NiCl2(aNHC)2 complex has been used as an efficient catalyst for the reduction of nitroarenes with hydrosilanes to give aromatic amines in good to excellent yields.

scholarly journals A Redox‐Active Nickel Complex that Acts as an Electron Mediator in Photochemical Giese Reactions

2019 ◽  
Vol 58 (15) ◽  
pp. 4953-4957 ◽  
Author(s):  
Thomas van Leeuwen ◽  
Luca Buzzetti ◽  
Luca Alessandro Perego ◽  
Paolo Melchiorre
Keyword(s):  
Nickel Complex ◽  
Electron Mediator ◽  
Redox Active

scholarly journals A Redox‐Active Nickel Complex that Acts as an Electron Mediator in Photochemical Giese Reactions

2019 ◽  
Vol 131 (15) ◽  
pp. 5007-5011 ◽  
Author(s):  
Thomas van Leeuwen ◽  
Luca Buzzetti ◽  
Luca Alessandro Perego ◽  
Paolo Melchiorre
Keyword(s):  
Nickel Complex ◽  
Electron Mediator ◽  
Redox Active

A phenalenyl-based nickel catalyst for the hydroboration of olefins under ambient conditions

2019 ◽  
Vol 48 (17) ◽  
pp. 5779-5784 ◽  
Author(s):  
Gonela Vijaykumar ◽  
Mrinal Bhunia ◽  
Swadhin K. Mandal
Keyword(s):  
Nickel Catalyst ◽  
Nickel Complex ◽  
Ambient Conditions ◽  
Redox Active

Catalytic hydroboration of alkenes is reported using the redox active phenalenyl ligand assisted nickel complex Ni(PLY)2(THF)2 in the presence of pinacolborane under ambient conditions.

Metallophthalocyanine-based redox active metal–organic conjugated microporous polymers for OER catalysis

2018 ◽  
Vol 54 (35) ◽  
pp. 4465-4468 ◽  
Author(s):  
Ashish Singh ◽  
Syamantak Roy ◽  
Chayanika Das ◽  
Debabrata Samanta ◽  
Tapas Kumar Maji
Keyword(s):  
Water Oxidation ◽  
Porous Polymers ◽  
Efficient Catalyst ◽  
Microporous Polymers ◽  
Redox Active ◽  
Active Metal ◽  
Donor Acceptor ◽  
Metal Organic ◽  
Redox Active Metal ◽  
Conjugated Microporous Polymers

Two donor–acceptor redox-active metal–organic conjugated porous polymers (CoCMP and ZnCMP) have been synthesized and CoCMP has been found to be an efficient catalyst for water oxidation.

scholarly journals Mechanistic investigation of benzene esterification by K2CO3/TiO2: the catalytic role of the multifunctional interface

2021 ◽  
Author(s):  
Jittima Meeprasert ◽  
Guanna Li ◽  
Evgeny A Pidko
Keyword(s):  
Density Functional Theory ◽  
Density Functional ◽  
Density Functional Theory Calculations ◽  
Efficient Catalyst ◽  
Functional Theory ◽  
Mechanistic Investigation ◽  
Tio2 Support ◽  
Catalytic Role ◽  
Catalytic Reactivity

Potassium carbonate dispersed over defective TiO2 support (K2CO3/TiO2) is an efficient catalyst for benzene esterification with CO2 and CH3OH. Density functional theory calculations reveal that this unique catalytic reactivity originates...

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