Randić's molecular connectivity index explained

The Randić index, also known as the connectivity index, of a graph is the sum of bond contributions

1 /(d _{i} d ^{1 / 2} _{j)} where d _{i} and d _{j} arethe degrees of the vertices making bond i ~ j.

History

This graph invariant was introduced by Milan Randić in 1975.^[1] It is often used in chemoinformatics for investigations of organic compounds.

References

• Roberto Todeschini, Viviana Consonni (2009) "Molecular Descriptors for Chemoinformatics", Wiley-VCH,
• .

Notes and References

1. .