Results 11 to 20 of about 26,157 (280)

Solvent effect on electronic absorption spectra of some 2-aminobenzimidazoles [PDF]

open access: yesActa Periodica Technologica, 2002
The effect of protic and aprotic solvents on electronic apsorption spectra of 1-(3-X-benzil)-2-aminobenzimidazoles (X=CH3;OCH3; Cl) was examined. UV-apsorption spectra (200-400 nm) were recorded in five protic and four aprotic solvents. Batochromic shift
Perušić-Janjić Nada U.   +2 more
doaj   +1 more source

Structure–property relationships in protic ionic liquids: a study of solvent–solvent and solvent–solute interactions [PDF]

open access: yesPhys. 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   +3 more sources

The Role of Solvent on the Kinetics and Mechanism of the Hydrolysis of Salicylidene Benzoyl Hydrazone [PDF]

open access: yesمجلة جامعة النجاح للأبحاث العلوم الطبيعية, 1988
The effect of various solvents on the kinetics and mechanism of the hydrolysis of Salicylidene Benzoyl hydrazone (SBH) has been studied at five different temperatures (17-45 C) using U.V. and visible spectrophotometry. In both protic and aprotic solvents,
Maher Abu-Eid
doaj   +1 more source

Ultrafast Intramolecular Charge Transfer of Formyl Perylene Observed Using Femtosecond Transient Absorption Spectroscopy [PDF]

open access: yes, 2010
The excited-state photophysics of formylperylene (FPe) have been investigated in a series of nonpolar, polar aprotic, and polar protic solvents. A variety of experimental and theoretical methods were employed including femtosecond transient absorption (
Mohammed, Omar F.
core   +1 more source

On the mechanism of the reaction of enamines and dimethyl acetylenedicarboxylate (DMAD) in polar and apolar solvents [PDF]

open access: yes, 1982
[2+2]-Cycloadducts of enamines and DMAD, formed in apolar solvents, isomerize to pyrrolizine derivatives under mild conditions in protic polar solvents like methanol and 1 ...
Reinhoudt, D.N.   +3 more
core   +3 more sources

Conformational Preferences of 3-(Dimethylazinoyl)propanoic Acid as a Function of pH and Solvent; Intermolecular versus Intramolecular Hydrogen Bonding [PDF]

open access: yes, 2009
The conformational equilibrium of 3-(dimethylazinoyl)propanoic acid (DMAPA, azinoyl = N^+(O^−) has a weak pH-dependence in D_2O, with a slight preference for trans in alkaline solutions.
Alley, Olivia J.   +5 more
core   +2 more sources

Z-Selective Homodimerization of Terminal Olefins with a Ruthenium Metathesis Catalyst [PDF]

open access: yes, 2011
The cross-metathesis of terminal olefins using a novel ruthenium catalyst results in excellent selectivity for the Z-olefin homodimer. The reaction was found to tolerate a large number of functional groups, solvents, and temperatures while maintaining ...
Endo, Koji   +3 more
core   +2 more sources

Poly(Pyridinium Salt)s Containing 2,7-Diamino-9,9′-Dioctylfluorene Moieties with Various Organic Counterions Exhibiting Both Lyotropic Liquid-Crystalline and Light-Emitting Properties

open access: yesMolecules, 2021
A series of poly(pyridinium salt)s-fluorene main-chain ionic polymers with various organic counterions were synthesized by using ring-transmutation polymerization and metathesis reactions. Their chemical structures were characterized by Fourier Transform
Pradip K. Bhowmik   +8 more
doaj   +1 more source

Ring closing metathesis in protic media by means of a neutral and polar ruthenium benzylidene complex [PDF]

open access: yes, 2002
The ring closing olefine metathesis in protic solvents using a new ruthenium benzylidene complex is ...
Grubbs, Robert H., Rölle, Thomas
core   +1 more source

Theoretical Investigation of Solvation Effects on the Tautomerism of Maleic Hydrazide

open access: yesE-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

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