Untitled

Abstract

HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

The effect of organic additive in Mg/graphite composite as hydrogen storage materials

“…Table 1 give the values of for all solvents used by Imamura and his collaborators in his various publications in this journal. It is interesting that the results of Khan et al [10] about the values of applied to copper chloro complex in various apro- Table 1 The values for dielectric constant ε and at room temperature [10]. tic solvents also seem to hold for magnesium carbon composite in THF.…”

“…The values of stability constantsˇj for metal complex formation increases again for greater than 60. It is interesting that Khan et al [10] observed that the values of the stability constantsˇj (j = 1, 4) for the formation of organomegnesium halides is higher for higher values of j. This was only valid when the values of is in the range from 9 to 20.…”

“…The ratio of the molecular weight of a compound mw to the dielectric constant ε should be given more importance vis-a-vis the dielectric constant of the organic additive alone [10]. This is because for aprotic solvents such as THF the stability constantš j (j = 1, 4) decrease with increasing values of the dielectric constants up to a certain value and then increase sharply for value of ε around 45.…”

“…This is because for aprotic solvents such as THF the stability constantš j (j = 1, 4) decrease with increasing values of the dielectric constants up to a certain value and then increase sharply for value of ε around 45. It is shown by Khan et al [10] that values of the stability constantsˇj (j = 1, 4) for metal complex formation (e.g. copper chloro complex) in the organic solvent is highly dependent on the ratio of the molecular weight of the solvent (the organic additive) divided by the dielectric constant (e.g.…”

Spectrophotometric Titration of Cobalt(II) with CaCl2 in Mixed Solvents of 2-Propanol and Water for the Analysis of the Extraction Mechanism of Cobalt(II) by Salting-out in the Presence of CaCl2

“…[2][3][4][5][6] The formation of halogeno complexes of cobalt(II) in various solvents, such as acetone, 7 molten acetamide, 8 nitromethane and nitrobenzene, 9 has been investigated. The color change of an aqueous Co(II) solution from pink to blue upon the addition of Cl -is a wellknown phenomenon and is ascribed to the conversion of Co(H2O)6 2+ to CoCl4 2-.…”