Electropy index

The electropy index may be viewed as a measure of the degree of freedom for electrons to occupy different subspaces during the process of molecular formation. 

Other information indices are - atomic composition indices, - information bond index, -> Morowitz information index, information index on size, information index on molecular symmetry, - information index on amino acid composition, -> information index on molecular conformations, -> Bertz complexity index, - Dos-morov complexity index, - Bonchev complexity index, -> atomic information indices, and electropy index. 

Mekenyan, O., Bonchev, D., Sabljic, A. and Trinajstic, N. (1987). Applications of Topological Indices to QSAR. The Use of the Balaban Index and the Electropy Index for Correlations with Toxicity of Ethers on Mice. Acta Pharm.Jugosl.,37,75-86. 

Information-theoretic indices, including the Shannon index, the chromatic information index, the orbital information index, the topological information superindex, the electropy index, and the Merrifield and Sinmions indices [13,14]. 

FHaya et al. 89) introduced an information index e, called electropy, based on the assumption that the molecule forms a finite space which is divided into several partial bond spaces according to the electronic pairings in the molecule. The electropy, e, is viewed as a measure of the degree of freedom of choice for electrons in occupying different partial spaces in during the process of molecular formation. 

Through the I Haya electropy was meant as an electronic information index, it is essentially topological in nature, but takes also into account electronic and steric factors through the intermediacy of topology. 

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