Results 41 to 50 of about 300,019 (196)
, 1993 The Hammett equation and two-parameter Taft equation are formulated using Rayleigh-Schrödinger perturbational method. The electronic structures of PhS compounds are found for several S substituents by application of INDO quantum method.
W Pietrzycki, P Tomasik
core +1 more source
chemspacelab/Enhanced-Hammett: Enhanced_Hammett
, 2020 Small python library with the implementation of the Enhanced-Hammett ...
MarcoBrag
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Synthesis of some substituted pyrazole-1- carbothioamides and spectral correlations in 3-(2,4-dibromophenyl)-5-(substituted phenyl)-4,5-dihydro-1H-pyrazole-1- carbothioamides [PDF]
QScience Connect, 2013 Background: This study aims to synthesise a series of 1-thiocarbomyl pyrazolines, including 3-(2,4-dibromophenyl)-5-(substituted phenyl)-4,5-dihydro-1H-pyrazole-1-carbothioamides, using solvent-free fly-ash:PTS catalyzed cyclization between chalcones and
G. Thirunarayanan, K. G.Sekar
doaj +1 more source
Angewandte Chemie International Edition, EarlyView.Aqueous solutions of HF and HCl show contrasting dissociation in water, yet exhibit nearly identical excess‐proton spectra. This puzzling observation is reconciled by a complementary Eigen–Zundel interpretation. ABSTRACT Aqueous solutions of HF and HCl behave very differently at intermediate concentrations: HCl dissociates completely, whereas HFonly ...
Louis Lehmann +6 more
wiley +1 more source
Extending the Hammett correlation to mechanochemical reactions
, 2023 Using Raman in situ monitoring and mechanochemistry-specific kinetic analysis, we find a correlation between the reaction probability and the Hammett constants in a model mechanochemical reaction of imine formation, indicating that the body of knowledge ...
Carta M. +7 more
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Protonation of maleic and fumaric acid in aqueous sulfuric acid solutions [PDF]
Journal of the Serbian Chemical Society, 2000 The protonations of maleic and fumaric acid in an acidic medium (aqueous solutions of sulfuric acid) were followed spectrophotometrically at room temperature. The acid-base equilibria were characterised qualitatively and quantitatively. The pKBH+
Jankovska Katica +2 more
doaj +3 more sources
Bulletin of the Chemical Society of Ethiopia, 2014 Some aryl-aryl 1H pyrazoles have been synthesised by cyclization of aryl chalcones and hydrazine hydrate in the presence of SOCl2. The yields of the pyrazoles are more than 85%.
K. Ranganathan +5 more
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Angewandte Chemie International Edition, EarlyView.Click chemistry has evolved from making covalent connections to also breaking bonds. Here, a cascade assembly is reported that combines these maneuvers to build multifunctional biomolecular scaffolds in a modular one‐pot reaction. The unifying azide release‐tetrazine hub clicks with a trans‐cyclooctene tag, rapidly liberates N,N‐dimethylaniline to ...
Markus Staudt +9 more
wiley +1 more source
Synthesis, spectral correlation and insect antifeedant activities of some 2-benzimidazole chalcones
Journal of Saudi Chemical Society, 2016 Some substituted styryl 2-benzimidazole ketones have been synthesised by fly-ash:H2SO4 catalysed aldol condensation of 2-benzimidazole methyl ketone and various substituted benzaldehydes in microwave oven. The yields of these chalcones are more than 70%.
P. Janaki, K.G. Sekar, G. Thirunarayanan
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Binding Constants of Substituted Benzoic Acids with Bovine Serum Albumin
Pharmaceuticals, 2020 Experimental data on the affinity of various substances to albumin are essential for the development of empirical models to predict plasma binding of drug candidates. Binding of 24 substituted benzoic acid anions to bovine serum albumin was studied using
Diliara Khaibrakhmanova +2 more
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