منابع مشابه
On the Preparation and Determination of Configurational Stability of Chiral Thio- and Bromo[D1]methyllithiums
Thio- and bromo[D(1)]methyllithiums (ee 99%) were generated from the respective stannanes by tin-lithium exchange at temperatures ranging from 0 to -95 °C. Thio[D(1)]methyllithiums 6 were found to be microscopically configurationally labile on the time scale of the thiophosphate-α-mercaptophosphonate rearrangement even at -95 °C. Thio[D(1)]methyllithiums 13a and 13b underwent a thia-[2,3]-Witti...
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The configurational relationship of dextro-methylethyl carbinol to dextro-lactic acid has been established.’ The establishment of the relationship of the higher members of the homologous series of alcohols to the same reference substance will permit the correlation of the configurations of the alcohols among themselves. The present paper contains a report on the results of the efforts in this d...
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In this paper we explore the general conditions in order that a 2-dimensional natural Hamiltonian system possess a second invariant which is a polynomial in the momenta and is therefore Liouville integrable. We examine the possibility that the invariant is preserved by the Hamiltonian flow on a given energy hypersurface only (weak integrability) and derive the additional requirement necessary t...
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Heating oncornavirus RNAs at temperatures insufficient for complete denaturation results in forms migrating between the native form (vRNA) and the completely denatured form (vRNA) after gel electrophoresis. Intermediate forms from Rous sarcoma virus or murine leukemia virus were isolated after heating of vRNA's at 58 degrees C and sedimenting in sucrose gradients, and at least four intermediate...
متن کاملConfigurational entropy of hard spheres
We numerically calculate the configurational entropy Sconf of a binary mixture of hard spheres, by using a perturbed Hamiltonian method trapping the system inside a given state, which requires less assumptions than the previous methods [R.J. Speedy, Mol. Phys. 95, 169 (1998)]. We find that Sconf is a decreasing function of packing fraction φ and extrapolates to zero at the Kauzmann packing frac...
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ژورنال
عنوان ژورنال: Organic Letters
سال: 2017
ISSN: 1523-7060,1523-7052
DOI: 10.1021/acs.orglett.7b01461