A topological approach to the stabilities of isomeric Huckel and Mobius type cyclacenes

Türker, Burhan Lemi
Within the constraints of Huckel molecular orbital theory, Huckel and Mobius type cyclacenes were investigated in terms of their angle of total pi-electron energy, O pi, and cos O pi to find out how structural changes affect the stabilities. It has been theoretically deduced that as the number of benzenoid rings (R) increases the isomeric Huckel and Mobius type cyclacenes should have comparable stabilities, although for low values of R odd-Huckel type and even-Mobius type are predicted to be more stable.


A novel approach to chemical resemblance of alternant hydrocarbons
Türker, Burhan Lemi (2002-02-14)
Within the constraints of the Huckel molecular orbital theory, a topological approach has been developed for the resemblance of alternant hydrocarbons. Four topological variables are considered which categorize alternant hydrocarbons having some resemblance of certain degree between them. Depending on variations of these topological variables, various groups of the compounds, including the identity case, various isomers and nonresembling systems have been investigated.
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In the present study, the rotation of material axes on the free bending vibrations response of a certain type of composite "Bonded and Stiffened System" is theoretically analyzed and numerically solved with some numerical results. The composite "Bonded and Stiffened System" is composed of a "Mindlin Base Plate or Panel" reinforced by three "Bonded Stiffening Plate Strips". In the analysis, the 90 rotation effects of the material axes on the natural frequencies and the mode shapes of the entire "System" are ...
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The structural and electronic properties of neutral ternary PbxSbySez clusters (x y + z = 2, 3) in their ground states have been explored by means of density functional theory calculations. The geometric structures and binding energies are systematically explored and for the most stable configurations of each cluster type vibrational frequencies, charges on atoms, energy difference between highest occupied and lowest unoccupied molecular orbitals, and the possible dissociations channels have been analyzed. ...
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Asymptotically flat black holes in 2 + 1 dimensions are a rarity. We study the recently found black flower solutions (asymptotically flat black holes with deformed horizons), static black holes, rotating black holes and the dynamical black flowers (black holes with radiative gravitons) of the purely quadratic version of new massive gravity. We show how they appear in this theory and we also show that they are also solutions to the infinite order extended version of the new massive gravity, that is the Born-...
An analysis of f(0)-sigma mixing in light cone QCD sum rules
Gokalp, A; Sarac, Y; Yılmaz, Osman (Elsevier BV, 2005-03-10)
We investigate f(0)-sigma mixing in the framework of light cone QCD sum rules and by employing the experimental results about the decay widths and the masses of these scalar mesons we estimate the scalar mixing angle by using sigma meson data and f(0) meson data. The two values we thus obtain of the scalar mixing angle are not entirely consistent with each other, possibly indicating that the structure of these mesons cannot be simple quark-antiquark states.
Citation Formats
B. L. Türker, “A topological approach to the stabilities of isomeric Huckel and Mobius type cyclacenes,” TURKISH JOURNAL OF CHEMISTRY, pp. 415–419, 1997, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/62366.