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The ability of CO to from a radical-anion, CO˙–, which can react further with CO or CO˙– with formation of C–C bonds has been suggested by literature data on (i) the reaction of CO with alkali metals, (ii) the electrochemical reduction of CO to squarate dianion, and (iii) adsorption of CO on metal oxides; we show that solutions containing Na and K anions are also effective reductants.
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Lednor et al. (1983) studied this question.
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