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Cycled-fused-borazines - MNDO and AMI treatments
Date
2003-11-17
Author
Türker, Burhan Lemi
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The Huckel type cycled-fused-borazines which are analogous to cyclacenes are considered for the semiempirical molecular orbital treatment at the level of MNDO and AMI type calculations. The structures having 3-10 arenoid rings (R) are considered. It has been found that they should be thermally stable and exogenic. Moreover, these properties get more and more as R increases. The systems exhibit no cryptoannulenic effect on any of the properties presently studied, showing that the peripheral circuits, unlike the ones in cyclacenes, are not influential.
Subject Keywords
Physical and Theoretical Chemistry
,
Biochemistry
,
Condensed Matter Physics
URI
https://hdl.handle.net/11511/62262
Journal
JOURNAL OF MOLECULAR STRUCTURE-THEOCHEM
DOI
https://doi.org/10.1016/j.theochem.2003.08.060
Collections
Department of Chemistry, Article
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Semi-empirical molecular orbital treatment at the level of AMI unrestricted Hartree-Fock type calculations was performed on the Huckel type boron and nitrogen substituted cyclacenes. Substitution is done either in a peri position or a fusion points. Boron substitution is found to be destabilizing. whereas nitrogen substitution has stabilizing effect on parent cyclacenes.
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Peripherally B and N substituted cyclacenes
Türker, Burhan Lemi; Gumus, S (Elsevier BV, 2004-10-25)
AM1 (RHF) type semiempirical quantum chemical calculations have been applied to cyclacenes whose fusion points and peri positions of one of their peripheral circuits are substituted with nitrogen and boron, respectively. The structures have been found to be stable but endothermic (except for R = 8 and 9) in nature. The nitrogen and boron (the fusion points peri positions, respectively,) substitution have been found to have stabilizing effect on the parent unsubstituted cyclacenes. Some geometrical and physi...
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B. L. Türker, “Cycled-fused-borazines - MNDO and AMI treatments,”
JOURNAL OF MOLECULAR STRUCTURE-THEOCHEM
, pp. 63–67, 2003, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/62262.