Now showing items 431-440 of 483
Assignment of the chemical shift values of N-trityl -homoserine lactone
(Elsevier, 1988)
This paper reports the correct assignment of all chemical shift values of N-trityl -homoserine lactone based on the 1H-nmr spectra of N-trityl-2S, 3R-[3-2H]- and 2S, 3S-[2,3-2H2]homoserine lactone.
Micellization and intermicellar interactions in aqueous sodium dodecyl benzene sulfonate solutions
(Elsevier, 1982-12)
Quasielastic light scattering was used to investigate the size and shape of sodium dodecyl benzene sulfonate (SDBS) micelles in aqueous solutions. Measurements were made as a function of temperature and NaCl and SDBS ...
Electrochemical reduction of 4-aminopyrimidine and cytosine in dimethyl sulfoxide
(Elsevier, 1982-12-23)
The electrochemical reduction in dimethyl sulfoxide of cytosine (4-amino-2-hydroxypyrimidine) and one of its model compounds (4-aminopyrimidine) has been examined. Initially, each pyrimidine (RH) undergoes a reversible, ...
Transmetallation of n-(trialkylstannyl)methylimines. A new method for the generation and cycloaddition of 2-azaallyl anions.
(Elsevier, 1988)
Transmetallation of imines 1 at -78[deg] with RLi provided 2-azaallyl anions 2, which readily undergo cycloaddition with olefinic anionophiles, providing pyrrolidines. Of particular note is the generation of unstabilized ...
The kinetics of water exchange across the chloroplast membrane
(Elsevier, 1980-08-05)
The kinetics of water exchange across the membrane of class II chloroplasts has been studied by two NMR methods. Both methods utilize Dy(en)3+ (en = ethylenediamine) to induce a transmembranal chemical shift the order of ...
A convenient synthesis of -(5'-deoxy-5'-adenosyl)- (+/-) -2-methylhomocysteine
(Elsevier, 1985)
The synthesis of -(5'-deoxy-5'-adenosyl)-+-2-methylhomocysteine in two steps from +--2-methylmethionine is described.
Rapid reductive-carboxylation of secondary amines. One pot synthesis of tertiary N-methylated amines
(Elsevier, 1985)
Various tertiary N-methylated amines were synthesized by using a new reductive-carboxylation approach. Secondary amines, on carboxylation with carbon dioxide under moderate reaction conditions, afforded their corresponding ...
Effects of anharmonicity of molecular vibrations on the diffraction of electrons : Part V. Tetrahedral molecules
(Elsevier, 1984-05)
Unless the skewing of radial distribution peaks is properly taken into account, diffraction analyses of gas molecules may lead to geometrically inconsistent arrays of internuclear distances. It is shown how to derive the ...
Carbon monoxide oxidation under transient conditions: A fourier-transform infrared transmission spectroscopy study
(Elsevier, 1985-07)
In contrast to the apparent simplicity of the overall reaction, oxidation of CO over Pt/A2O3 is known to present complex behavior. Self-sustained oscillations, hysteresis loops in conversion, and enormous rate enhancements ...
The microwave spectrum and structure of allyl alcohol
(Elsevier, 1987-11-16)
The microwave spectrum of the normal species of the gauche, gauche isomer of allyl alcohol has been reassigned and rotational and centrifugal distortion constants have been determined. Rotational constants of nine deuterated ...