Figure 4
Melting points for series of isomers: (•) trichloro- (TCB), (♦) tribromo- (TBB) and (▴) triiodobenzenes (TIB), plotted as a function of Z′. The solid lines join the points for isomers containing the same halogen atoms, while the dashed lines are for isomers with the same halogen-atom positions in an aromatic ring. Both the solid and dashed lines are guides for the eye only. |