Enthalpies Delta(fus)H(m) and temperatures T-fus of fusion for a homologous series of ten alkane-alpha, w-diamines H2N-(CH2)(n)-NH2, where n = (3 to 12), were measured by differential scanning calorimetry. Entropies of fusion Delta(fus)S(m) were derived from the experimental results. Temperatures of fusion increased as a function of n, and showed a marked odd-even effect with higher values for even terms. The odd-even effect was also observed for molar enthalpies and entropies of fusion as a function of n. Comparison was made with literature values for temperatures, enthalpies, and entropies of fusion of isoelectronic linear alkanes H3C-(CH2)(n)-CH3. Results were interpreted on the basis of the literature data on crystal structures of the alkane-alpha, w-diamines and their corresponding intermolecular interactions. The Delta(fus)H(m) and Delta(fus)S(m) interplay provided distinct linear plots for odd and even terms of alkane-alpha, w-diamines showing, a common slope value, T-fus approximate to 380 K, which was also found for odd and even linear alkanes with n = (6 to 18).