On 30 benzenoid hydrocarbons, the sum-connectivity Gourava index predicts pi-electronic energy with R=0.9997, slightly better than the product-connectivity variant with R=0.9970, and shows comparable structural discrimination to modern indices.
Gutman, Geometric approach to degree-based topological indices: Sombor indices, MATCH Communications in Mathematical and in Computer Chemistry.86(1)(2021) 11–16
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A comparative study of sum-connectivity and product-connectivity Gourava indices for benzenoid hydrocarbons
On 30 benzenoid hydrocarbons, the sum-connectivity Gourava index predicts pi-electronic energy with R=0.9997, slightly better than the product-connectivity variant with R=0.9970, and shows comparable structural discrimination to modern indices.