Strain in strain-free benzenoid hydrocarbons: the case of fibonacenes |
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Authors: | Slavko Radenkovi? Ivan Gutman Sne?ana Zdravkovi? Marija Anti? |
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Institution: | 1.Faculty of Science,University of Kragujevac,Kragujevac,Serbia |
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Abstract: | In a recent paper (Radenkovic et al. Chem Phys Lett 625:69–72, 2015), a new method for quantifying the strain energy in benzenoid molecules, resulting from the repulsion between the bay H-atoms was elaborated. In this work, we present a modified procedure, capable of estimating the strain energy in a single-step calculation. Strain energies were obtained at the B3LYP/def2-TZVP level of density functional theory. It was found that in benzenoid molecules with a single bay region, the strain energy is essentially constant, equal to around 7.3 kJ/mol. On the other hand, in the case of the first four members of the fibonacene series, the strain energy is found to be linearly proportional to the number of bay regions. |
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