The cobalt(II) complex of a new tridentate Schiff-base ligand as a catalyst for hydrosilylation of olefins

Gorczyński, Adam; Zaranek, Maciej; Witomska, Samanta; Bocian, Aleksandra; Stefankiewicz, Artur R.; Kubicki, Maciej; Patroniak, Violetta; Pawluć, Piotr

doi:10.1016/j.catcom.2016.02.009

Cited by 47 publications

(20 citation statements)

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“…The scope for the unsaturated substrate is versatile, including alkene,, , alkyne, carbonyl, and carboxylic derivative groups. Additionally, a number of different silanes can be used: much research is performed with phenylsilane, and other silanes such as diphenylsilane, alkyl silanes, and alkoxy silanes, can be employed as well.…”

Section: Introductionmentioning

confidence: 99%

Cobalt(II) and (I) Complexes of Diphosphine‐Ketone Ligands: Catalytic Activity in Hydrosilylation Reactions

et al. 2019

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The hydrosilylation of unsaturated compounds homogeneously catalyzed by cobalt complexes has gained considerable attention in the last years, aiming at substituting precious metal‐based catalysts. In this study, the catalytic activity of well‐characterized CoII and CoI complexes of the pToldpbp ligand is demonstrated in the hydrosilylation of 1‐octene with phenylsilane. The CoI complex is the better precatalyst for the mentioned reaction under mild conditions, at 1 mol‐% catalyst, 1 h, room temperature, and without solvent, yielding 84 % of octylphenylsilane. Investigation of the substrate scope shows lower performance of the catalyst in styrene hydrosilylation, but excellent results with allylbenzene (84 %) and acetophenone (> 99 %). This catalytic study contributes to the field of cobalt‐catalyzed hydrosilylation reactions and shows the first example of catalysis employing the dpbp ligand in combination with a base metal.

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Section: Introductionmentioning

confidence: 99%

Cobalt(II) and (I) Complexes of Diphosphine‐Ketone Ligands: Catalytic Activity in Hydrosilylation Reactions

et al. 2019

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“…As an important class of compounds, Schiff bases have received much attention in the wide variety of fields due to structural varieties and unique characteristics such as preparative accessibility, varied coordination ability, thermal stability, biological activities and catalysis properties [8][9][10]. Schiff base ligands are able to coordinate with many different metals and stabilize them in various oxidation states [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Formation constants and thermodynamic parameters of bivalent Co, Ni, Cu and Zn complexes with Schiff base ligand: Experimental and DFT calculations

Esmaielzadeh¹,

Mashhadiagha²

2017

Bull. Chem. Soc. Eth.

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ABSTRACT. Formation constant (Kf) values of Schiff base ligand, L = methyl-2-{[1-methyl-2-(aceton)ethylidynenitrilo]ethyl}amino-1-cyclopentenedithiocarboxylate, with Co(II), Ni(II), Cu(II) and Zn(II) ions has been determined spectrophotometrically for 1:1 complex formation at constant ionic strength 0.01 M (NaClO4), and at various temperatures in DMF solvent. Thermodynamic studies of the complexes have been carried out and their stability were found in the order CoL > CuL > NiL > ZnL. The enthalpy, entropy and Gibbs free energy changes of the complexation reaction have been evaluated from the temperature dependence of the formation constant. Our experimental results revealed that the complexation process is spontaneous, exothermic and entropically unfavorable. Also, B3LYP/(LANL2DZ and ‫)٭٭‪6-311G‬‬ level density functional theory is applied on the structure and stability of Schiff base ligand and their complexes. HOMO-LUMO and binding energies were calculated to obtained stability of the complexes. The theoretical results are compared with experimental data.

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“…Ligand L was prepared as reported by us previously. 88 Varying the L : Ln(III) salt ratio has not led to compounds that differ in stoichiometry but only to a decrease in the overall yield. Hence, the procedure described below allows for the most efficient synthesis of compounds 1-4.…”

Section: Synthesis and Characterization Of The Lanthanide Complexesmentioning

confidence: 99%

“…Based on our previous experience in the construction of lanthanide Schiff-base complexes with tridentate binding subunits 80,[85][86][87] we have envisaged that the N 3 -donor ligand L (Fig. 1) 88 should form monometallic lanthanide complexes of potentially different stoichiometry.…”

Section: Introductionmentioning

confidence: 99%

New field-induced single ion magnets based on prolate Er(iii) and Yb(iii) ions: tuning the energy barrierU_effby the choice of counterions within an N₃-tridentate Schiff-base scaffold

Gorczyński

Marcinkowski

Kubicki

et al. 2018

Inorg. Chem. Front.

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The cobalt(II) complex of a new tridentate Schiff-base ligand as a catalyst for hydrosilylation of olefins

Cited by 47 publications

References 32 publications

Cobalt(II) and (I) Complexes of Diphosphine‐Ketone Ligands: Catalytic Activity in Hydrosilylation Reactions

Cobalt(II) and (I) Complexes of Diphosphine‐Ketone Ligands: Catalytic Activity in Hydrosilylation Reactions

Formation constants and thermodynamic parameters of bivalent Co, Ni, Cu and Zn complexes with Schiff base ligand: Experimental and DFT calculations

New field-induced single ion magnets based on prolate Er(iii) and Yb(iii) ions: tuning the energy barrierU_effby the choice of counterions within an N₃-tridentate Schiff-base scaffold

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The cobalt(II) complex of a new tridentate Schiff-base ligand as a catalyst for hydrosilylation of olefins

Cited by 47 publications

References 32 publications

Cobalt(II) and (I) Complexes of Diphosphine‐Ketone Ligands: Catalytic Activity in Hydrosilylation Reactions

Cobalt(II) and (I) Complexes of Diphosphine‐Ketone Ligands: Catalytic Activity in Hydrosilylation Reactions

Formation constants and thermodynamic parameters of bivalent Co, Ni, Cu and Zn complexes with Schiff base ligand: Experimental and DFT calculations

New field-induced single ion magnets based on prolate Er(iii) and Yb(iii) ions: tuning the energy barrierUeffby the choice of counterions within an N3-tridentate Schiff-base scaffold

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New field-induced single ion magnets based on prolate Er(iii) and Yb(iii) ions: tuning the energy barrierU_effby the choice of counterions within an N₃-tridentate Schiff-base scaffold