The construction and design of molecules which crystallize in a
predictable manner leading to expected structures remains the
ultimate goal of crystal engineering [1,2]. One of the reasons why
it is so difficult to predict a crystal structure based purely on the
molecular structure relates to the interplay between the various
interactions that in turn determine which structure is the most stable
[3–10]. It follows that understanding how different interactions
combine to form a complete structure and which are the structure
determining interactions is vital if some degree of predictability is
to be achieved [11].