**8. Conclusion**

In this chapter, the common methods for the synthesis and crystallization of phosphoramidates, their molecular structural features and the hydrogen-bond patterns and strengths were reviewed; the important structural aspects may be classified as follows:


7. In the multi-centered hydrogen-bond of the type P=O[…H-N]n (n = 2 & 3) the hydrogen-bond is weak due to the anticooperativity effect.

We wish to collect more structural data about this class of compounds and study the collective behavior of this family in the other domains such as spectroscopy and chemical calculations.
