. Can. J . Chem. 58,22(1980) Electrical conductivity measurements are reported for solutions in trifluoromethanesulfonic acid of a number of simple and complex bases. including univalent and divalent metal trifluoromethanesulfonates. The univalent metal salts, water. aniline, and acetic acid behave a s fully dissociated bases, while the alkaline earth metal salts show considerable ion association. The trifluoromethanesulfonate anion appears to have an abnormally high mobility, as compared to the metal cations. and is believed to conduct by a proton-transfer mechanism. Dissociation constants for some n e a k organic bases and association constants for strontium and barium trifluoromethanesulfonates are estimated. Sulfuric acid behaves as a weak electrolyte, while sulfur trioxide is effectively a non-electrolyte. The conductivities of potassium nitrate and potassium dihydrogenphosphate are consistent nith the formation of the nitryl cation and the phosphate acidium ion. respectively. DAVID G. R U S S E L L~~ JOHN B. SENIOR. Can. J . Chem. 58,22(1980). On rapporte les mesures de conductivite electrique d'un certain nombre de bases simples et complexes incluant les trifluoromethane sulfonates de metaux mono et bivalents en solution dans I'acide trifluoromethane sulfonique. I.es sels de metaux monovalents. l'eau, I'aniline et l'acide acetique se comportent comme des bases totalement dissociees alors que les sels de metaux alcalino terreux montrent une tres grande association d'ions. L'anion trifl~~oromethanesulfonique semble avoir une grande mobilite qui est anormale si on la compare B celle des cations metalliques et on pense que cette mobilite est due a un mecanisme de transfert de proton. On evalue les constantes de dissociation de quelques bases organiques faibles et les constantes d'association des trifluoromethanesulfonates de strontium et de barium. L'acide sulfurique se comporte comme un electrolyte faible alors que l'anhydride sulfurique est effectivement un non electrolyte. Les conductivites du nitrate et du phosphate diacide de potassium sont en accord avec la formation du cation nitryle et de I'ion phosphate acidium respectivement.[Traduit par le journal]

Modern armed conflicts have a tendency to spill across state boundaries as armed groups relocate to countries where there is less military capacity or political inclination to fight them. Thus far, the spatial diffusion of these conflicts has remained under-explored. To fill this gap, this article presents a new Spatial Conflict Dynamics indicator (SCDi) that measures the intensity and spatial concentration of political violence at the subnational level from 1997 to 2019. This new resource leverages data from the Armed Conflict Location & Event Data Project (ACLED) from 1997-2019. Applied to the case of North and West Africa, the new spatial indicator shows which regions experience the most conflicts, how conflicts change geographically over time, and how foreign interventions affect the geography of conflicts.

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