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Papers by JHON JAIRO PEREZ SANTAMARIA
La investigación sobre competencias ciudadanas que se pueden fomentar en la clase de Matemáticas ... more La investigación sobre competencias ciudadanas que se pueden fomentar en la clase de Matemáticas para trabajar por una cultura de paz, muestra que existe la oportunidad de fortalecer la convivencia escolar como parte de la educación del post conflicto colombiano, ya que, pueden ser una herramienta para fomentar las competencias ciudadanas, debido a que, en algunos procesos, dinámicas y competencias matemáticas pueden contribuir a la formación en ciudadanía.
Tetrahedron Letters, 1989
A selective and mild photochemical procedure for benzylic oxidations with 9,lOdicyanoanthracene (... more A selective and mild photochemical procedure for benzylic oxidations with 9,lOdicyanoanthracene (DCA), an usual electron acceptor, in the presence of methyl viologen (MV2+), an electron relay, has been developed Methyl and methylene groups are oxidized in good to excellent yields to the corresponding hydroperoxides. Hydroperoxides are important intermediates in autoxidation and in organic synthesis for which they represent useful forms of "mono-oxygen donating" reagents for oxidative transformations.
Tetrahedron Letters, 1989
Journal of the American Chemical Society, 1988
La paire d'ions [Ar + , OsO 4 − ] est un intermediaire dans l'osmylation etudiee (Ar=benz... more La paire d'ions [Ar + , OsO 4 − ] est un intermediaire dans l'osmylation etudiee (Ar=benzene, naphtalene, anthracene, phenanthrene)
The Journal of Chemical Physics, 1985
The extension of the Barker–Henderson (BH) theory to diatomic potentials is examined by compariso... more The extension of the Barker–Henderson (BH) theory to diatomic potentials is examined by comparison of the predicted thermodynamic properties with ‘‘exact’’ MC results. Two choices of the potential separation have been considered; corresponding to the BH scheme and that of Weeks–Chandler–Andersen (WCA). Attention has been paid to the effect of the usual approximations to the exact properties of the hard reference system (equation of state and pair correlation functions) and to the convergence rate of the expansion. Conclusions can also be drawn for the extension of the WCA-blip function theory to these systems. It is shown that the behavior of the perturbation expansions exhibits the same features observed in atomic fluids. Nevertheless, the presence of the molecular anisotropy leads to a rather different assessment of the relative usefulness of each theory. Incidentally, small inaccuracies of the well-known Boublik and Nezbeda equation for the compressibility factor of dumbbells hav...
The Journal of Chemical Physics, 1985
Several Monte Carlo simulations with a sample of 125 molecules of n-butane with four Lennard-Jone... more Several Monte Carlo simulations with a sample of 125 molecules of n-butane with four Lennard-Jones centers and internal rotation, have been carried out by varying the values of ε and σ parameters of the intermolecular potential. In this way the effect of such changes on the thermodynamic, structural, and conformational properties have been studied. Although the structure remains practically unaffected by moderate variations in the Lennard-Jones parameters, nevertheless the conformational equilibrium is very sensitive to them. Also specific properties of chain molecules in the n-butane, such as the effect of the relative position of centers (external vs internal ones) and the possibility of orientational correlation have been explored. The difference between the effects of the external centers vs the internal ones can be quantified and it turns out to be significant; on the other hand the orientational correlation is very weak at room temperature and normal liquid density.
Chemical Physics, 1984
A Monte Carlo study for iiqutd benzene, where the pax potenttal ts described as a sum of Lennard-... more A Monte Carlo study for iiqutd benzene, where the pax potenttal ts described as a sum of Lennard-Jones (12.6) mteractions acting between six equtvalent centres of each molecule, has been camed out The potenttal parameters have been chosen tn such a Hay that the Internal energy and venal pressure were tn agreement with the experimental values The liqutd structure has been examined in detarl by computrng several dtstnbutlon functtons distnbution between molecular planes.
La investigación sobre competencias ciudadanas que se pueden fomentar en la clase de Matemáticas ... more La investigación sobre competencias ciudadanas que se pueden fomentar en la clase de Matemáticas para trabajar por una cultura de paz, muestra que existe la oportunidad de fortalecer la convivencia escolar como parte de la educación del post conflicto colombiano, ya que, pueden ser una herramienta para fomentar las competencias ciudadanas, debido a que, en algunos procesos, dinámicas y competencias matemáticas pueden contribuir a la formación en ciudadanía.
Tetrahedron Letters, 1989
A selective and mild photochemical procedure for benzylic oxidations with 9,lOdicyanoanthracene (... more A selective and mild photochemical procedure for benzylic oxidations with 9,lOdicyanoanthracene (DCA), an usual electron acceptor, in the presence of methyl viologen (MV2+), an electron relay, has been developed Methyl and methylene groups are oxidized in good to excellent yields to the corresponding hydroperoxides. Hydroperoxides are important intermediates in autoxidation and in organic synthesis for which they represent useful forms of "mono-oxygen donating" reagents for oxidative transformations.
Tetrahedron Letters, 1989
Journal of the American Chemical Society, 1988
La paire d'ions [Ar + , OsO 4 − ] est un intermediaire dans l'osmylation etudiee (Ar=benz... more La paire d'ions [Ar + , OsO 4 − ] est un intermediaire dans l'osmylation etudiee (Ar=benzene, naphtalene, anthracene, phenanthrene)
The Journal of Chemical Physics, 1985
The extension of the Barker–Henderson (BH) theory to diatomic potentials is examined by compariso... more The extension of the Barker–Henderson (BH) theory to diatomic potentials is examined by comparison of the predicted thermodynamic properties with ‘‘exact’’ MC results. Two choices of the potential separation have been considered; corresponding to the BH scheme and that of Weeks–Chandler–Andersen (WCA). Attention has been paid to the effect of the usual approximations to the exact properties of the hard reference system (equation of state and pair correlation functions) and to the convergence rate of the expansion. Conclusions can also be drawn for the extension of the WCA-blip function theory to these systems. It is shown that the behavior of the perturbation expansions exhibits the same features observed in atomic fluids. Nevertheless, the presence of the molecular anisotropy leads to a rather different assessment of the relative usefulness of each theory. Incidentally, small inaccuracies of the well-known Boublik and Nezbeda equation for the compressibility factor of dumbbells hav...
The Journal of Chemical Physics, 1985
Several Monte Carlo simulations with a sample of 125 molecules of n-butane with four Lennard-Jone... more Several Monte Carlo simulations with a sample of 125 molecules of n-butane with four Lennard-Jones centers and internal rotation, have been carried out by varying the values of ε and σ parameters of the intermolecular potential. In this way the effect of such changes on the thermodynamic, structural, and conformational properties have been studied. Although the structure remains practically unaffected by moderate variations in the Lennard-Jones parameters, nevertheless the conformational equilibrium is very sensitive to them. Also specific properties of chain molecules in the n-butane, such as the effect of the relative position of centers (external vs internal ones) and the possibility of orientational correlation have been explored. The difference between the effects of the external centers vs the internal ones can be quantified and it turns out to be significant; on the other hand the orientational correlation is very weak at room temperature and normal liquid density.
Chemical Physics, 1984
A Monte Carlo study for iiqutd benzene, where the pax potenttal ts described as a sum of Lennard-... more A Monte Carlo study for iiqutd benzene, where the pax potenttal ts described as a sum of Lennard-Jones (12.6) mteractions acting between six equtvalent centres of each molecule, has been camed out The potenttal parameters have been chosen tn such a Hay that the Internal energy and venal pressure were tn agreement with the experimental values The liqutd structure has been examined in detarl by computrng several dtstnbutlon functtons distnbution between molecular planes.