Articles with "withdrawing groups" as a keyword



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Metal‐free iodine‐mediated deoxygenation of alcohols in the position α to electron‐withdrawing groups

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Published in 2018 at "European Journal of Organic Chemistry"

DOI: 10.1002/ejoc.201800051

Abstract: The use of a substoichiometric amount of molecular iodine in the presence of PPh3 and pyridine effects a direct deoxygenation of primary and secondary alcohols in positions α to a variety of activating electron‐withdrawing groups,… read more here.

Keywords: electron withdrawing; withdrawing groups; metal free; free iodine ... See more keywords

Regulating the Active Sites of Metal-Phthalocyanine at the Molecular Level for Efficient Water Electrolysis: Double Deciphering of Electron-Withdrawing Groups and Bimetallic.

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Published in 2022 at "Small"

DOI: 10.1002/smll.202207243

Abstract: Implementing a molecular modulation strategy for metallic phthalocyanines (MPc) without losing the activity of the metal center and inducing a multifunction characteristic in electrocatalytic remains a challenge. Herein, a series of 2D CuCo bimetallic polymerized… read more here.

Keywords: electron withdrawing; active sites; water; withdrawing groups ... See more keywords
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Spectroscopic and electrochemical comparison of [FeFe]-hydrogenase active-site inspired compounds: Diiron monobenzenethiolate compounds containing electron-donating and withdrawing groups

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Published in 2021 at "Polyhedron"

DOI: 10.1016/j.poly.2021.115043

Abstract: Abstract The novel compounds [Fe2(μ-SC6H4-p-NO2)2(CO)6] (1), [Fe2(μ-SC6H4-p-tBu)(μ-SC6H4-p-NO2)(CO)6] (2), [Fe2(μ-SC6H4-p-tBu)2(CO)6] (3), [Fe2(μ-SC6H4-p-tBu)(μ-SC6H4-p-CF3)(CO)6] (4) and [Fe2(μ-SC6H4-p-OCH3)(μ-SC6H4-p-CF3)(CO)6] (5) have been characterized by 1H-NMR, FTIR, elemental analysis, and cyclic voltammetry. X-ray crystallography of compounds 1 and 2 reveal an… read more here.

Keywords: sc6h4; withdrawing groups; donating withdrawing; fe2 sc6h4 ... See more keywords

η 2 Coordination of Electron-Deficient Arenes with Group 6 Dearomatization Agents.

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Published in 2020 at "Organometallics"

DOI: 10.1021/acs.organomet.0c00277

Abstract: The exceptionally π-basic metal fragments {MoTp-(NO)(DMAP)} and {WTp(NO)(PMe3)} (Tp = tris(pyrazolyl)borate; DMAP = 4-(N,N-dimethylamino)pyridine) form thermally stable η 2-coordinated complexes with a variety of electron-deficient arenes. The tolerance of substituted arenes with fluorine-containing electron withdrawing… read more here.

Keywords: coordination; withdrawing groups; group; electron deficient ... See more keywords

Trap State Modulation via Strong Electron-Withdrawing Groups for Enhanced Vacuum Surface Insulation of All-Organic Polyimide.

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Published in 2025 at "ACS applied materials & interfaces"

DOI: 10.1021/acsami.5c10530

Abstract: Polyimide (PI), a high-performance polymer widely employed in aerospace applications due to its superior electrical insulation, processability, and long-term stability, faces operational challenges at vacuum-solid interfaces. Under extreme space conditions, vacuum flashover phenomena frequently occur… read more here.

Keywords: insulation; surface; strong electron; withdrawing groups ... See more keywords

O2 reduction by iron porphyrins with electron withdrawing groups: to scale or not to scale.

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Published in 2022 at "Faraday discussions"

DOI: 10.1039/d1fd00076d

Abstract: Iron porphyrins are synthesized by systematically introducing electron withdrawing groups (EWGs) on pyrroles to evaluate the relationship between rate (k) and overpotential (η). The results indicate that while EWGs lead to a rise in the… read more here.

Keywords: iron; rate; iron porphyrins; electron withdrawing ... See more keywords

Electron-withdrawing groups as property tuners in functionalized terpyridine-based ligands in Eu(III) and Tb(III) complexes.

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Published in 2025 at "Dalton transactions"

DOI: 10.1039/d5dt02417j

Abstract: Three terpyridine derivatives with electron-withdrawing groups in the ortho-position of terpyridine, -NO2 (terpyNO2), -CHO (terpyCHO) and -Br (terpyBr), were isolated and the influence of these substituents on the chemical and photophysical characteristics of the corresponding… read more here.

Keywords: iii; iii complexes; terpyridine; iii iii ... See more keywords

Desymmetrization on electron-withdrawing groups in single benzene fluorophores for fine tuning of photophysical properties and applications

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Published in 2025 at "RSC Advances"

DOI: 10.1039/d5ra03628c

Abstract: In this study, a series of unsymmetrical single-benzene fluorophore (SBF) derivatives were systematically synthesized by selectively disrupting the ester symmetry of standard diamino terephthalate-type analogs via alternative synthetic routes. Various electron-donating groups (EDGs) and electron-withdrawing… read more here.

Keywords: desymmetrization electron; series; withdrawing groups; electron withdrawing ... See more keywords

Tuning optical and electronic properties of indanthrene derivatives with electron-withdrawing groups (–Cl, –NO2 and –C≡N) for enhanced organic solar cell performance: a DFT approach

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Published in 2024 at "Physica Scripta"

DOI: 10.1088/1402-4896/ada0f3

Abstract: In this study, we focused on improving the electronic and optical properties of the reference compound indanthrene (R) by introducing electron-withdrawing groups (−Cl, −C≡N, −NO2). Density functional theory and time-dependent density functional theory calculations were… read more here.

Keywords: derivatives electron; density; indanthrene derivatives; groups no2 ... See more keywords