2-substituted-naphthalene binary and ternary systems: From random alloys to complexes

2-Chloronaphthalene-octafluoronaphthalene, 2-methylnaphthalene-octafluorona phthalene binary systems and 2-chloronaphthalene-2-methylnaphthalene-octafl uoronaphthalene ternary system have been assessed by differential scanning calorimetry and X-ray powder diffraction. Each binary system presents a 1:1 complex. The pseudobinary section of the ternary system shows a new phase which is probably ordered and may behave as a "complex of complexes". Final ly, ternary alloys show the turn over from ordered to random lattices. Ther modynamic properties of these systems are analyzed through the associated l iquid model and the line-compound formalism.