The electronic effect of hydrogen in alkoxysilanes HkSi(CH3)1(OCH3)m

1978 ◽  
Vol 43 (12) ◽  
pp. 3385-3390 ◽  
Author(s):  
Josef Pola ◽  
Václav Chvalovský
Keyword(s):  
Electronic Effect

The effects controlling the oxygen basicity in alkoxysilanes (RO)nSi(CH3)4-n. The mutual polarizability effect of alkoxy groups attached to silicon

1979 ◽  
Vol 44 (3) ◽  
pp. 750-755 ◽  
Author(s):  
Josef Pola ◽  
Marie Jakoubková ◽  
Václav Chvalovský
Keyword(s):  
Regression Analysis ◽  
Linear Regression ◽  
Electronic Effect ◽  
Linear Regression Analysis ◽  
Effect Of Substituents ◽  
Relative Basicity ◽  
Polarizability Effect ◽  
Alkoxy Groups ◽  
Individual Series

Relative basicity of the oxygen in alkoxysilanes (RO)nSi(CH3)3-n having n = 1-4 and various electrondonating and electronwithdrawing groups R measured as Δν(OH) of phenol due to its interaction with these compounds in CCl4 is shown to be chiefly controlled by the electronic effect of substituents R. Linear regression analysis of the Δν(OH) vs n relatioship for individual series (RO)nSi(CH3)4-n suggests the operation of the polarizability effect of RO groups becoming more important with increasing electronwithdrawing nature of R.

Variable electronic effect of silyl groups attached to oxygen

1978 ◽  
Vol 43 (3) ◽  
pp. 746-752 ◽  
Author(s):  
Josef Pola ◽  
Václav Chvalovský
Keyword(s):  
Electronic Effect ◽  
Silyl Groups

Tuning and understanding the electronic effect of Co-Mo-O sties in bifunctional electrocatalysts for ultralong-lasting rechargable zinc-air battery

2021 ◽  
Author(s):  
Yi Guan ◽  
Nan Li ◽  
Jiao He ◽  
Yongliang Li ◽  
Lei Zhang ◽  
...  
Keyword(s):  
Electronic Effect ◽  
Metal Organic Frameworks ◽  
Core Shell ◽  
Zeolitic Imidazolate Frameworks ◽  
Assembly Strategy ◽  
The Core ◽  
Bifunctional Electrocatalysts ◽  
Metal Organic ◽  
Air Battery

Herein, we report a post-assembly strategy by growing the bimetallic Co/Zn zeolitic imidazolate frameworks (BIMZIF) on the surface of the customized Mo metal-organic frameworks (MOFs) (Mo-MOF) to prepare the core-shell...

Raman electronic effect for non‐destructive boron calibration in type IIb semiconducting diamond

2021 ◽  
Author(s):  
Shengya Zhang ◽  
Zhuangfei Zhang ◽  
Wencai Yi ◽  
Xin Chen ◽  
Xiaobing Liu
Keyword(s):  
Electronic Effect ◽  
Semiconducting Diamond ◽  
Non Destructive

scholarly journals Chiral Aziridine Sulfide N(sp3),S-Ligands for Metal-Catalyzed Asymmetric Reactions

Symmetry ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 502
Author(s):  
Agata J. Pacuła-Miszewska ◽  
Anna Laskowska ◽  
Anna Kmieciak ◽  
Mariola Zielińska-Błajet ◽  
Marek P. Krzemiński ◽  
...  
Keyword(s):  
Metal Binding ◽  
Electronic Effect ◽  
Asymmetric Reactions ◽  
Addition Reactions ◽  
Phenyl Sulfide ◽  
Enantiomeric Ratio ◽  
Catalyzed Reactions ◽  
Metal Catalyzed ◽  
Sulfide Group

A series of new bidentate N,S-ligands—aziridines containing a para-substituted phenyl sulfide group—was synthesized and evaluated in the Pd-catalyzed Tsuji–Trost reaction and addition of diethylzinc and phenylethynylzinc to benzaldehyde. A high enantiomeric ratio for the addition reactions (up to 94.2:5.8) was obtained using the aziridine ligand bearing a p-nitro phenyl sulfide group. Collected results reveal a specific electronic effect that, by the presence of particular electron-donating or electron-withdrawing groups in the PhS- moiety, influences the σ-donor–metal binding and the enantioselectivity of the catalyzed reactions.

Rapid synthesis of a PtRu nano-sponge with different surface compositions and performance evaluation for methanol electrooxidation

Nanoscale ◽  
2015 ◽  
Vol 7 (21) ◽  
pp. 9467-9471 ◽  
Author(s):  
Meiling Xiao ◽  
Ligang Feng ◽  
Jianbing Zhu ◽  
Changpeng Liu ◽  
Wei Xing
Keyword(s):  
Performance Evaluation ◽  
Electronic Effect ◽  
Catalyst System ◽  
Methanol Electrooxidation ◽  
Co Poisoning ◽  
Rapid Synthesis ◽  
Highly Active ◽  
Electro Oxidation ◽  
Pt Utilization ◽  
And Performance

A rapid strategy to synthesize a highly active PtRu alloy nano-sponge catalyst system for methanol electro-oxidation is presented. The greatly increased Pt utilization, anti-CO poisoning ability and electronic effect result from the porous nano-sponge structure.

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