“…Isomerically pure monoadducts were obtained by the reaction of secondary diamines, for example N,N′-dimethylethylenediamine, piperazine, homopiperazine [81], N-ethylethylenediamine and further ethylenediamine derivatives [80], with C 60 between 0 and 110 °C (Figure 3.9) [80,81]. Isomerically pure monoadducts were obtained by the reaction of secondary diamines, for example N,N′-dimethylethylenediamine, piperazine, homopiperazine [81], N-ethylethylenediamine and further ethylenediamine derivatives [80], with C 60 between 0 and 110 °C (Figure 3.9) [80,81].…”