Results 241 to 250 of about 26,157 (280)

Solvent-free transformation of protic ionic liquids into zwitterions

Chemical Communications
Protic ionic liquids containing a vinyl-sulfonylamide anion catalytically transformed into zwitterions upon addition of a base under solvent-free conditions.
Yosuke Nakazono, Ryota Inoue, Ryo Sumitani, Tomoyuki Mochida   +3 more
openaire   +2 more sources

Chemistry of methylgallium(III) compounds in protic solvents

Organometallics, 1987
Abstract : The chemical properties of as well as routes to the formation of methylgallium (III) compounds in aqueous acidic solutions and in other protic solvents have been investigated. Aqueous perchloric acid solutions of Me2GaC10 at room temperature are surprisingly resistant to hydrolytic cleavage of the gallium-carbon bond.
O. T. Beachley, R. U. Kirss, R. J. Bianchini, T. L. Royster   +3 more
openaire   +1 more source

Substitution reactions of trans-[PtL2Cl2] in protic solvents

Journal of Inorganic and Nuclear Chemistry, 1966
Abstract An investigation of the nucleophilic substitutions of trans-[PtL2Cl2], L = P(C2H5)3 or piperidine, with 36Cl−, Br−, N3−, I− and SCN− in methyl, ethyl and butyl alcohols at 40°C is reported. The rate determining step is the substitution of the first chloride atom. The pseudo-first order rate constants, kobs.sec−1, are consistent with the two
G. Faraone, U. Belluco, V. Ricevuto, R. Ettorre   +3 more
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Hydrogen-bonded capsules in polar, protic solvents.

Chemical communications (Cambridge, England), 2002
A kinetically stable, dimeric capsule is formed by tetrahydroxyresorcinarene in methanol; it encapsulates tropylium and tetramethylammonium cations.
A, Shivanyuk, J, Rebek
openaire   +1 more source

Chimeric Behavior of Excited Thioxanthone in Protic Solvents: II. Theory

The Journal of Physical Chemistry A, 2014
The chimeric behavior of thioxanthone in protic solvents has been investigated employing computational chemistry methods. In particular, methanol and 2,2,2-trifluoroethanol have been chosen in this study. The solvent environment has been modeled using microsolvation in combination with a conductor-like screening model.
Vidisha, Rai-Constapel, Torben, Villnow, Gerald, Ryseck, Peter, Gilch, Christel M, Marian   +4 more
openaire   +2 more sources

Unprecedented high fluorescence anisotropy in protic solvents: Hydrogen bond induced solvent caging?

Chemical Physics Letters, 2016
Atypical high fluorescence anisotropy has been revealed in protic solvents for excited state intramolecular proton transfer (ESIPT) prone 3-hydroxyflavone and some of its hydroxy derivatives. In non-protic solvents, however, the anisotropy values are low.
Sinjan Das, Saptarshi Ghosh, Nitin Chattopadhyay   +2 more
openaire   +1 more source

Photooxidation of Co-thiolato complexes in protic and aprotic solvents

Chemical Communications, 2006
Protic solvents decrease the susceptibility of the thiolate ligand in Co(III) thiolato complexes toward attack by singlet oxygen, but greatly increase the conversion of the peroxidic intermediate to the sulfenato product.
Billy, Hernandez, Yanju, Wang, Dong, Zhang, Matthias, Selke   +3 more
openaire   +2 more sources

Efficiency of Bulky Protic Solvent for S_N2 Reaction

Organic Letters, 2007
We calculate and compare the effects of aprotic vs protic solvent on the rate of SN2 reaction [F- + C3H7OMs--> C3H7F + OMs-]. We find that aprotic solvent acetonitrile is more efficient than a small protic solvent such as methanol. Bulky protic solvent (tert-butyl alcohol) is predicted to be quite efficient, giving the rate constant that is similar to ...
Sung-Sik, Lee, Ho-Sung, Kim, Tae-Kyu, Hwang, Young-Ho, Oh, Sung-Woo, Park, Sungyul, Lee, Byoung Se, Lee, Dae Yoon, Chi   +7 more
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Selective Recognition of Alkyl Pyranosides in Protic and Aprotic Solvents

Journal of the American Chemical Society, 2008
The design and synthesis of receptors capable of selective, noncovalent recognition of carbohydrates continues to be a signature challenge in bioorganic chemistry. We report a new generation of tripodal receptors incorporating three pyridine (compound 2) or quinoline (compound 3) rings around a central cyclohexane core for use in molecular recognition ...
Prakash B, Palde, Peter C, Gareiss, Benjamin L, Miller   +2 more
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Lyotropic Mesophases of K‐Palmitate in Protic Solvents

Lipid / Fett, 1994
AbstractComparing the phase diagrams of the three binary soap systems KC16/glycerol, KC16/ethylene glycol and KC16/butylene glycol (KC16 = K‐palmitate), we found alterations in types of phase diagrams that depend on the chemical structure of the protic solvent. Variation of the polymorphic transitions were observed.
openaire   +1 more source