Atomic Parameters for Covalent Compounds

Most of covalent compounds are molecular compounds. The properties of these compounds are chiefly determined by their molecular structure. It is usually to use many quantum chemical parameters such as HOMO, LUMO, atomic net charges and the topological indices or 3-dimensional molecular descriptors as the useful parameters for the investigation of these compounds. 

Some inorganic covalent compounds are crystalline solids built by covalent bonds. Some of these types of compounds are important functional materials, such as compound semiconductors. Atomic parameters such as covalent radius and electronegativity are useful atomic parameters for the investigation of these materials. 

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