Results 91 to 100 of about 2,216 (186)

Foszforheterociklusok szintézise és hasznosítása = The synthesis and use of phosporus heterocycles [PDF]

, 2007
A kutatás három fő szálon futott, egyrészt az 5- és 6-tagú, másrészt a 7- és 8-tagú - ez utóbbi esetben áthidalt - P-heterociklusok területén, harmadrészt egy inverz Wittig-típusú reakció témájában.
Balázsdi Szabó, Nóra, Bat Amgalan, Namkhainyambuu, Farkas, Renáta, Forintos, Henrietta, Hegedűs, László, Imre, Tímea, Keglevich, György, Kovács, János, Körtvélyesi, Tamás, Ludányi, Krisztina, Novák, Tibor, Odinets, Irina Leonovna, Polonkáné Bálint, Ágnes, Sipos, Melinda, Stefan, Jankowski, Szelke, Helga, Szöllősy, Áron, Vinogradova, Natalya Mikchailovna, Vékey, Károly   +18 more
core  

Energetic Preferences in Cyclic π-Conjugated Systems: Aromaticity Localizes and Antiaromaticity Spreads

Chemistry
Cyclic π-conjugated organic species are classical examples of (anti)aromatic compounds. Two key features that characterize their (anti)aromatic behavior are the aromatic stabilization (or destabilization) energy and the degree of bond-length equalization
Miquel Solà, Luigi Cavallo
doaj   +1 more source

Изучение ароматичности пятичленных мезоионных гетероциклов [PDF]

, 2011
Результаты основных критериев ароматичности (NICS, ASE, HOMA, I5) 54 пятичленных мезоионных гетероциклов, полученные с помощью квантово-химических расчетов произведенных в валентно-расщепленном базисе 6-31G* в рамках метода Хартри-Фока и теории ...
Моржерин, Ю. Ю., Нейн, Ю. И.   +1 more
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Proton Affinities of Didehydroporphyrin and Subporphyrin in Ground and Excited States Obtained by Quantum Chemical Calculations [PDF]

, 2009
Quantum-chemical calculations were used to investigate molecular and electronic properties of porphyrin and subporphyrin. Their basicities were estimated in ground and excited states.
Glasovac, Zoran, Margetić, Davor, Vazdar, Mario   +2 more
core   +1 more source

Nucleophilicity/Electrophilicity Excess in Analyzing Molecular Electronics

, 2005
Intramolecular electron transfer capability of all metal aromatic and anti-aromatic aluminum cluster compounds is studied in terms of density functional theory based global and local reactivity descriptors.
Chattaraj, P. K., Roy, D. R., Subramanian, V.   +2 more
core  

Advanced opto-electronics materials by fullerene and acetylene scaffolding [PDF]

, 2017
Functional π-systems with unusual opto-electronic properties are intensively investigated from both fundamental research and technological application viewpoints.
Diederich, François
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π-Conjugated Phospholes and their Incorporation into Devices; A Component with a Great Deal of Potential

, 2016
International audienceThis review serves as a brief introduction to phospholes and discusses their unique favorable properties for applications in organic electronic materials.
Bouit, Pierre-Antoine, Delaunay, Wylliam, Duffy, Matthew P., Hissler, Muriel   +3 more
core   +3 more sources

Recent advances in antiaromatic metallacycles

Dalton Transactions
Recently, several antiaromatic metallacycles are reported, establishing a new area of (anti)aromaticity. Herein, we briefly review the syntheses and characterizations of these fascinating antiaromatic structures.
Lei Li, Yang Li, Wenfeng Jiang, Wei Bai
openaire   +2 more sources

Synthesis and electronic properties of polycyclic aromatic hydrocarbons doped with phosphorus and sulfur

, 2016
International ...
Bouit, Pierre-Antoine, Delaunay, W., Hissler, M., Mocanu, A., Nyulászi, L., Pascal, Simon, Szűcs, R.   +6 more
core   +3 more sources

Fully Conjugated Heteroatomic Non- and Quasi-Alternant Polyradicals

Chemistry
In this work, we present fully π-conjugated diradical(oid)s and tetraradical(oid)s with five-membered non-alternant cyclopentadienyl and quasi-alternant thiophene rings, the latter of which is used as a source of aromatic stabilization.
Sergi Betkhoshvili, Jordi Poater, Ibério de P. R. Moreira, Josep Maria Bofill   +3 more
doaj   +1 more source