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IJC-A Vol.46A(05) [May 2007] >

Title: Estrada index of acyclic molecules
Authors: Gutman, Ivan
Furtula, Boris
Glišić, Biljana
Marković, Violeta
Vesel, Aleksander
Issue Date: May-2007
Publisher: CSIR
Abstract: A structure-descriptor EE, recently proposed by Estrada, is examined. If λ₁, λ₂,..., λո are the eigenvalues of the molecular graph, then EE=Ʃeλi . In the case of trees with n vertices (that are the graph representations of alkane isomers CռH2ռ₊₂), the main structural factor influencing the differences between the EE-values has been found to be the Zagreb index Zg. The coefficient b in the regression line EE = a Zg + b is an almost perfectly linear function of n, implying that in the case of alkanes, EE linearly increases with the number of carbon atoms.
Page(s): 723-728
ISSN: 0376-4710
Source:IJC-A Vol.46A(05) [May 2007]

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