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Conductivities of 1:1 electrolytes in mixed aprotic solvents—II. dimethoxyethane mixtures with propylene carbonate and 4-butyrolactone

✍ Scribed by M. Salomon; E.J. Plichta

Publisher: Elsevier Science
Year: 1985
Tongue: English
Weight: 599 KB
Volume: 30
Category: Article
ISSN: 0013-4686
DOI: 10.1016/0013-4686(85)80068-2

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✦ Synopsis

The conductivities of five 1 : 1 electrolytes have been measured in mixtures of dimethoxyethane with propylene carbonate and 4butyrolactone.

As in previous studies involving mixed ethereal solvents, a maximum in the molar conductances is found for a specific solvent mixture.

From consideration ofsingle ion mobilities, Stokes'radii,and the Bjerrum treatment ofion association, we conclude that while small cationsare highly coordinated by dimethoxyethane which promotes the formation of solvent-separated ion pairs, a significant number of contact ion pairs exist. Conductivity data for tetraalkylammonium chlorides suggest that these salts form both ion pairs and higher (neutral) aggregates such as quadrupoles.

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Conductivities and ion association of 1:

Conductivities and ion association of 1:1 electrolytes in mixed aprotic solvents

✍ M. Salomon; E. Plichta 📂 Article 📅 1983 🏛 Elsevier Science 🌐 English ⚖ 508 KB

Molar conductivities of the 1: 1 electrolytes LiCIO+ LiAsF,, n-Bu.,NCIO.+ and n-Bu,NBPh, were measured in mixtures of propylene carbonate and dimethoxymethane over the concentration range 0.01-l x 10m4 mol dm-'. In all cases a maximum in molar conductivity (and hence in electroiytic conductivity) i