Dilatometric studies of reaction volumes for the formation of metal complexes in several solvents |
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Authors: | Shigenobu Funahashi Kimiyo Sengoku Toru Amari Motoharu Tanaka |
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Affiliation: | (1) Laboratory of Analytical Chemistry, Faculty of Science, Nagoya University, Chikusa, 464 Nagoya, Japan |
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Abstract: | A convenient technique is described to determine reaction volumes by means of direct dilatometry. Reaction volumes were determined for the following complexation reactions: formation of monoamminenickel(II) in water (–0.1±0.5 cm3-mol–1); formation of the 1:1 nickel(II) complex with isoquinoline in methanol and ethanol (3.2±0.1 and 1.1±0.1 cm3-mol–1, respectively); formation of the 1:1 isothiocyanatoiron(III) complex in water, Me2SO, and DMF (8.9±0.2, 12.4±0.7, and 25.1±0.3 cm3-mol–1, respectively); formation of the 18-crown-6 potassium complex in water (10.9±0.2 cm3-mol–1). We discussed these values in terms of electrostriction and molecular size. |
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Keywords: | Dilatometry reaction volume metal complex formation formation constant electrostriction |
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