Results 1 to 10 of about 12,878 (240)

Universal Trends between Acid Dissociation Constants in Protic and Aprotic Solvents. [PDF]

Chemistry, 2022
AbstractpKa values in non‐aqueous solvents are of critical importance in many areas of chemistry. Our knowledge is, despite their relevance, still limited to the most fundamental properties and few pKa values in the most common solvents. Taking advantage of a recently introduced computationally efficient procedure we computed the pKa values of 182 ...
Busch M, Ahlberg E, Laasonen K.
europepmc   +6 more sources

Condensation of Benzyl Carbamate with Glyoxal in Polar Protic and Aprotic Solvents [PDF]

Molecules, 2023
The synthesis of substituted 2,4,6,8,10,12-hexaazaisowurtzitane via direct condensation is challenging. The selection of starting ammonia derivatives is very limited.
Artyom E. Paromov
doaj   +4 more sources

Broadband fluorescence reveals mechanistic differences in excited-state proton transfer to protic and aprotic solvents. [PDF]

Chem Sci, 2020
Time-resolved broadband fluorescence facilitates direct observation of reaction intermediates in excited-state proton transfer to solvent in protic and aprotic solvents.
Verma P, Rosspeintner A, Dereka B, Vauthey E, Kumpulainen T.   +4 more
europepmc   +6 more sources

Preferential Solvation of Zwitterionic Benzo-[f]-Quinolinium Ylids in Binary Solvent Mixtures: Spectral Study and Quantum Chemical Calculations [PDF]

Molecules
Three derivatives of benzo-[f]-quinolinium ylids, which all underwent an intermolecular charge transfer process, were used as solvatochromic indicators to study the specific solvent–solute interactions in binary mixtures of protic–aprotic solvents with ...
Mihaela Iuliana Avadanei, Ovidiu Gabriel Avadanei, Dana Ortansa Dorohoi   +2 more
doaj   +2 more sources

Insights into impact of polar protic and aprotic solvents on bioactive features of 3-(Dimethylaminomethyl)-5-nitroindole: A DFT study and molecular dynamics simulations. [PDF]

PLoS ONE
Polar protic and aprotic solvents can effectively simulate the maturation of breast carcinoma cells. Herein, the influence of polar protic solvents (water and ethanol) and aprotic solvents (acetone and DMSO) on the properties of 3-(dimethylaminomethyl)-5-
Stève-Jonathan Koyambo-Konzapa, Berthelot S D Ramlina Vamhindi, Bekzod Khudaykulov, Peter A Sidhom, Shahzeb Khan, Ashraf M M Abdelbacki, Alaa H M Abdelrahman, Mahmoud A A Ibrahim   +7 more
doaj   +2 more sources

Efficient Production and Isolation of 3‐Acetamido‐5‐Acetylfuran from N‐Acetyl‐D‐Glucosamine within Protic Ionic Liquids [PDF]

ChemistryOpen
The transformation of chitin and its monomer N‐acetylglucosamine (NAG) to high‐value organonitrogen chemicals has attracted increasing interest, with 3‐acetamido‐5‐acetylfuran (3A5AF) proposed as a versatile platform chemical.
Emma L. Matthewman, Prof. Jonathan Sperry, Dr. Cameron C. Weber   +2 more
doaj   +2 more sources

Photooxidative cleavage of oxazoline-2-thione in protic and aprotic solvents

Bulletin of the Chemical Society of Ethiopia, 1999
Indra Sen Singh
doaj   +4 more sources

Reactivity of cyclohex-1-enylcarboxylic and 2-methylcyclohex-1-enylcarboxylic acids with diazodiphenylmethane in aprotic solvents [PDF]

Journal of the Serbian Chemical Society, 2000
Rate constants for the reaction of diazodiphenylmethane with cyclohex-1-enylcarboxylic acid and 2-methylcyclohex-1-enylcarboxylic acid were determined in nine aprotic solvents, as well as in seven protic solvents, at 30°C using the appropriate UV ...
VERA V. KRSTIC, GORDANA S. USCUMLIC, JASMINA B. NIKOLIC   +2 more
doaj   +3 more sources

Investigations of the reactivity of pyridine carboxylic acids with diazodiphenylmethane in protic and aprotic solvents. Part II. Pyridine mono-carboxylic acid N-oxides [PDF]

Journal of the Serbian Chemical Society, 2006
The rate constants for the reaction of three isomeric pyridine mono-carbocylic acid N-oxides with diazodiphenylmethane were determined at 30 ºC in thirty two protic and aprotic solvents by the well known UV spectrophotometric method.
MILICA MISIC-VUKOVIC, ALEKSANDAR D. MARINKOVIC, BRATISLAV Z. JOVANOVIC, SASA Z. DRMANIC   +3 more
doaj   +3 more sources

Solvent effect on electronic absorption spectra of cyclohex-1-enylcarboxylic and 2-methylcyclohex-1-enylcarboxylic acids [PDF]

Journal of the Serbian Chemical Society, 2000
The ultraviolet absorption spectra of cyclohex-1-enylcarboxylic acid and 2-methylcyclohex-1-enylcarboxylic acid were determined in six protic and nine aprotic solvents in the wavelength range from 200 to 400 nm.
VERA V. KRSTIC, GORDANA S. USCUMLIC, JASMINA B. NIKOLIC   +2 more
doaj   +2 more sources