**4. General conclusion**

The presented experimental and theoretical findings confirm the conclusion that none of the approaches can explain completely the structure and the formation mechanism of organic liquids. However, these approaches complement each other and help to solve the problem to some extent. In **Table 4** we have listed the advantages and disadvantages of each method and model.

A promising direction in the development of the DFT approach for investigating the problem of the formation mechanism and structure of organic liquids is the elaboration of the methods for calculating molecular systems with delocalized and smoothed electron density. Studying these systems can help to clarify the nature and structure of organic liquids.

*The Formation Mechanism and Structure of Organic Liquids in the DFT Challenges DOI: http://dx.doi.org/10.5772/intechopen.100429*


**Table 4.**

*Advantages and disadvantages of approaches to organic liquids structure.*
