Results 11 to 20 of about 220,193 (199)
On the Roles of Protic Solvents in Imidazolidinone‐Catalyzed Transformations
Angewandte Chemie International Edition, 2011 Step by step: The effect of protic solvents on the rate and stereochemical outcome of the imidazolidinone-catalyzed Diels–Alder cycloaddition was rationalized. The following picture emerges: the solvent accelerates iminium ion formation (step 1), the Diels–Alder cycloaddition is reversible (step 2), and the solvent intercepts the iminium ion adduct ...
Brazier, John B. +3 more
core +7 more sources
Investigations of the reactivity of pyridine carboxylic acids with diazodiphenylmethane in protic and aprotic solvents. [PDF]
Journal of the Serbian Chemical Society, 2005 Rate constants for the reaction of diazodiphenylmethane with isomeric pyridine carboxylic acids were determined in chosen protic and aprotic solvents at 30 °C, using the well known UV spectrophotometric method.
ALEKSANDAR D. MARINKOVIC +3 more
doaj +1 more source
Characterization and Reactivity of Triperoxo Vanadium Complexes In Protic Solvents
European Journal of Inorganic Chemistry, 2001 ESI-MS and 51V NMR techniques have been used to detect the formation of vanadium triperoxo complexes in protic solvents. RHF/6-311++G(d,p) ab initio calculations were also carried out to address the structure and the energy requirements of vanadium peroxo species formed from vanadates and hydrogen peroxide.
M. Bonchio +3 more
openaire +3 more sources
Dynamical behavior of the azide ion in protic solvents
Chemical Physics Letters, 1993 Abstract Molecular dynamics calculations based on rigid molecules have been used to study the solvation structure and dynamics of an azide ion in methanol and water. The ion is found to have either five to six methanols or six to seven waters in its solvation cage.
FERRARIO, Mauro +2 more
openaire +3 more sources
FA Polymerization Disruption by Protic Polar Solvents [PDF]
Polymers, 2018 Furfuryl alcohol (FA) is a biobased monomer derived from lignocellulosic biomass. The present work describes its polymerization in the presence of protic polar solvents, i.e., water or isopropyl alcohol (IPA), using maleic anhydride (MA) as an acidic initiator.
Falco, Guillaume +3 more
openaire +4 more sources
Structure–property relationships in protic ionic liquids: a study of solvent–solvent and solvent–solute interactions [PDF]
Phys. Chem. Chem. Phys., 2017 Ionicity of protic ionic liquids are significantly affected by additional functionality, thereby influencing solvation properties.
Joshua E. S. J. Reid +6 more
openaire +5 more sources
Molecules, 2022 The synthesis of new 6-Bromoquinolin-4-ol derivatives (3a–3h) by Chan–Lam coupling utilizing different types of solvents (protic, aprotic, and mixed solvents) and bases was studied in the present manuscript.
Mahwish Arshad +4 more
doaj +1 more source
Theoretical Investigation of Solvation Effects on the Tautomerism of Maleic Hydrazide
E-Journal of Chemistry, 2012 A DFT study is used to calculate structural data of tautomers of maleic hydrazide (MH) in the gas phase and selected solvents such as benzene (non-polar solvent), tetrahydrofuran (polar aprotic solvent) and methanol (protic solvent), dimethyl sulfoxide ...
Meisam Shabanian +3 more
doaj +1 more source
Macedonian Journal of Chemistry and Chemical Engineering, 2010 The influence of the polarity of the solvent and hydrogen bonding on the electronic absorption spectra of some previously synthesized substituted 1,2,4-triazoline-3-thiones was studied.
Mirjana Jankulovska +4 more
doaj +1 more source
Origin of High Efficiency and Long-Term Stability in Ionic Liquid Perovskite Photovoltaic
Research, 2020 Environment-friendly protic amine carboxylic acid ionic liquids (ILs) as solvents is a significant breakthrough with respect to traditional highly coordinating and toxic solvents in achieving efficient and stable perovskite solar cells (PSCs) with a ...
Lingfeng Chao +21 more
doaj +1 more source