The current observations and analysis of the structure-phase correlations in the DADQ molecules could be extended to other f amilies of f unctional molecular solids. This would be of potential interest in the design of molecular materials and devices that exploit solid state transf ormations and phase change phenomena. The general f eatures of the correlations developed in the present study can guide the analysis of the role of amorphous and crystalline systems in various areas of physical and biological sciences.