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Litowce na ujemnych stopniach utlenienia

Misiołek A., Łysiak V., Jarzembek K.

Wiadomości Chemiczne

2000

[Z] 54, 11-12

1063-1074

It is usually believed that alkali metals can only take positive oxidation number. In 50s and 60s the solutions of alkali metals in amines and liquid ammonia have been investigated, and the presence of solvated electrons (paramagnetic individuals) and of some diamagnetic individuals in these solutions was found [2, 5]. In 70s macrocycles have been used for the solubilization of alkali metals. The concentration of metals in solutions considerably increases in the presence of these compounds, which makes the solutions of alkali metals an interesting object for chemical and in particular physico-chemical investigations. These indicated that it is the alkali metal anion that is responsible for diamagnetism of the samples [8-14]. Until now a variety of methods have been developed which aimed at synthesis of the compounds containing the alkali metal anion found in solutions or as crystals (ionic crystals) [10, 19, 23, 38]. The physical and chemical properties of such compounds and their use in synthesis have been investigated [10, 49, 52, 54, 56].