Hafnocene and hydrazine: The addition of two equivalents of carbon dioxide to the hafnocene dinitrogen complex 1 proved effective for the formation of nitrogen–carbon bonds directly from N2 and CO2. Subsequent treatment of 2 with Me3SiI liberated the dicarboxylated silyl-substituted hydrazine 3.
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Bernskoetter et al. (2006) studied this question.
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