Gutman, IvanVidović D.Furtula, BorisZenkevich, Igor G.2023-03-092023-03-092003Gutman, I., Vidović, D., Furtula, B., & Zenkevich, I. G. (2003). Wiener-type indices and internal molecular energy. Journal of the Serbian Chemical Society, 68(4-5), 401-408.0352-5139https://scidar.kg.ac.rs/handle/123456789/17079In earlier studies it was established that internal molecular energies (Eint) of alkanes can be reproduced, in an approximate yet reliable manner by means of a molecular-graph-based structure-descriptor U. It was also established that U is linearly correlated with the Wiener index W. We now show that the correlation between U and W is more complicated than earlier expected, and that it cannot be represented by a single line. We also show that a very good linear correlation exists between U and a modified version Wm(λ) of the Wiener index, which is thus more suitable for modeling Eint than the ordinary Wiener index. .en-USWiener indexmodified Wiener indexinternal molecular energyalkanesarticle10.2298/JSC0305401G