Fusion and solid-to-solid transitions of a homologous series of 11 alkane-a,x-dinitriles NC-(CH2)n-CN, where n = (1 to 10 and 12),were investigated by differential scanning calorimetry (d.s.c.). The temperatures of fusion increased as a function of the number of carbonatoms in the alkyl chains and showed a marked odd–even effect with even terms displaying higher values. Molar and massic enthalpiesand entropies of fusion also showed odd–even alternation. Solid-to-solid transitions were detected for all compounds, except dodecanedinitrile.Comparison was made with the literature values for temperatures, enthalpies, and entropies of fusion of linear alkanes andalkane-a,x-diamines.
Fusion and solid-to-solid transitions of a homologous series of alkane-aw-dinitriles
BLANCO, Ignazio;
2007-01-01
Abstract
Fusion and solid-to-solid transitions of a homologous series of 11 alkane-a,x-dinitriles NC-(CH2)n-CN, where n = (1 to 10 and 12),were investigated by differential scanning calorimetry (d.s.c.). The temperatures of fusion increased as a function of the number of carbonatoms in the alkyl chains and showed a marked odd–even effect with even terms displaying higher values. Molar and massic enthalpiesand entropies of fusion also showed odd–even alternation. Solid-to-solid transitions were detected for all compounds, except dodecanedinitrile.Comparison was made with the literature values for temperatures, enthalpies, and entropies of fusion of linear alkanes andalkane-a,x-diamines.File | Dimensione | Formato | |
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