Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Investigation of novel topological indices and their applications in organic chemistry
Download
index.pdf
Date
2009
Author
Gümüş, Selçuk
Metadata
Show full item record
Item Usage Stats
351
views
470
downloads
Cite This
Numerical descriptors, beginning with Wiener, and then named topological indices by Hosoya, have gained gradually increasing importance along with other descriptors for use in QSAR and QSPR studies. Being able to estimate the physical or chemical properties of a yet nonexistent substance as close as possible is very important due to huge consumption of time and money upon direct synthesis. In addition, one may face safety problem as in the case of explosives. There have been almost hundred topological indices so far in the chemical graph theory literature. However, there is no topological index which is generalizable to all kinds of molecules. In the present study, a novel topological index (TG Index) has been developed and applied to a wide range of organic molecules including explosives for modeling their physical, structural and molecular orbital properties. The index yielded quite successful correlation data with most of the properties considered in this study.
Subject Keywords
Chemistry, Organic
URI
http://etd.lib.metu.edu.tr/upload/2/12611019/index.pdf
https://hdl.handle.net/11511/19114
Collections
Graduate School of Natural and Applied Sciences, Thesis
Suggestions
OpenMETU
Core
Design and Synthesis of Pyrrolotriazepine Derivatives: An Experimental and Computational Study
Menges, Nurettin; Sari, Ozlem; Abdullayev, Yusif; Erdem, Safiye Sag; Balcı, Metin (American Chemical Society (ACS), 2013-06-07)
The pyrrole derivatives having carbonyl groups at the C-2 position were converted to N-propargyl pyrroles. The reaction of those compounds with hydrazine monohydrate resulted in the formation of 5H-pyrrolo[2,1-d][1,2,5]-triazepine derivatives. The synthesis of these compounds was accomplished in three steps starting from pyrrole. On the other hand, attempted cyclization of a pyrrole ester substituted with a propargyl group at the nitrogen atom gave, unexpectedly, the six-membered cyclization product, 2-amin...
DFT calculations of pentalenoquinones: towards the interception of 2-bromopentalene-1,5-dione
Atalar, Taner; Algi, Fatih; Balcı, Metin (ARKAT USA, Inc., 2008-01-01)
To reveal the stability and the aromatic character of pentalenoquinones (PQs) 1-4 and the corresponding bromo derivatives (Br-PQs) 6-9, DFT calculations (B3LYP/6-311+G(d,p)) concerning the geometry optimization, total energy and nucleus independent chemical shift (NICS) values were performed. It was found that all of the compounds have planar geometry. As the energy difference between HOMO-LUMO energy levels (Delta epsilon=epsilon(LUMO) - epsilon(HOMO)) and total energies were considered for the pentalene f...
Recent progress in asymmetric synthesis of aziridine derivatives (microreview)
Doğan, Özdemir (Springer Science and Business Media LLC, 2018-04-01)
This microreview describes recent advances in asymmetric synthesis of aziridine derivatives, which have been published over the last two years.
Synthesis of 1,4-Thiazepines
Kelgokmen, Yılmaz; Zora, Metin (American Chemical Society (ACS), 2018-08-03)
An efficient, general, and unprecedented methodology for the synthesis of 2-methylene-2,3-dihydro-1,4-thiazepines from N-propargylic beta-enaminones is described. Initially, N-propargylic beta-enaminones were thionated with Lawesson's reagent in good to high yields, and then the resulting N-propargylic beta-enaminothiones were subjected to electrophilic cyclization. When treated with zinc chloride in refluxing chloroform, Npropargylic beta-enaminothiones underwent electrophilic cyclization to yield 2-methyl...
A new approach for the synthesis of spiro and gem-dimethyl-substituted 1,4-oxazepines from N-propargylic beta-enaminones
Karadeniz, Eda; Kelgökmen, Yılmaz; Zora, Metin (Wiley, 2020-11-01)
An efficient and general method for the synthesis of spiro-1,4-oxazepines and 3,3-dimethyl-1,4-oxazepines is reported. When treated with ZnI2 and AgSbF6 in refluxing DCE, cyclohexane-embedded N-propargylic beta-enaminones underwent 7-exo-dig cyclization to afford spiro-1,4-oxazepines, specifically 12-methylene-11-oxa-7-azaspiro[5.6]dodeca-7,9-dienes, in good to high yields. Accordingly, N-(1,1-dimethyl)propargylic beta-enaminones produced 3,3-dimethyl-1,4-oxazepines. Cyclization was found to be general for ...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
S. Gümüş, “Investigation of novel topological indices and their applications in organic chemistry,” Ph.D. - Doctoral Program, Middle East Technical University, 2009.