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4 edition of Annulenes, Benzo-Hetero-, Homo- Derivatives, and Their Valence Isomers found in the catalog.

Annulenes, Benzo-Hetero-, Homo- Derivatives, and Their Valence Isomers

Alexandru T. Balaban

Annulenes, Benzo-Hetero-, Homo- Derivatives, and Their Valence Isomers

  • 284 Want to read
  • 8 Currently reading

Published by Crc Pr I Llc .
Written in English

    Subjects:
  • Organic chemistry,
  • Annulenes,
  • Specific Organic Compounds,
  • Science/Mathematics

  • The Physical Object
    FormatHardcover
    Number of Pages744
    ID Numbers
    Open LibraryOL9395309M
    ISBN 100849368790
    ISBN 109780849368790
    OCLC/WorldCa233551281

    Elemental carbon isomerism Elemental carbon isomerism Klein, D. J.; Liu, X. A systematic mathematically based approach is made to categorize the different stereochemical possibilities for finite carbon clusters comprised of fully bonded smooth nets of carbon atoms all of which are trigonally hybridized. An exceptional richness of ideas and theorems from topology.


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Annulenes, Benzo-Hetero-, Homo- Derivatives, and Their Valence Isomers by Alexandru T. Balaban Download PDF EPUB FB2

Buy Annulenes, Benzo- Hetero- Homo-Derivatives, and Their Valence Isomers: Vol. 1 on FREE SHIPPING on qualified orders. Annulenes, Benzo- Hetero- Homo-Derivatives, and their Valence Isomers Volume I Authors Alexandru T. And Their Valence Isomers book Professor Department of Organic Chemistry The Polytechnic Bucharest, Romania Mircea Banciu Associate Professor Department of Organic Chemistry The Polytechnic Bucharest, Romania Vasile Ciorba First Economic Secretary West Europe Direction.

Annulenes, Benzo- Hetero- Homo-Derivatives, and their Valence Isomers Volume II Authors Alexandru T. Balaban Professor Department of Organic Chemistry The Polytechnic Bucharest, Romania Mircea Banciu Associate Professor Department of Organic Chemistry The Polytechnic Bucharest, Romania Vasile Ciorba First Economic Secretary West Europe Direction.

Additional Physical Format: Online version: Balaban, Alexandru T. Annulenes, benzo- hetero- homo-derivatives and their valence isomers. Boca Raton, Fla.: CRC Press. S10 6.

References 1) Balaban, A. T.; Banciu, M.; Ciorba, V. Annulenes, Benzo- Hetero- Homo- Derivatives, and their Valence Isomers; CRC Press: Boca Raton, FL, Benzoannelated valence isomers of homoannulenes Part IV.

Flow vacuum pyrolysis of 1,2,3,3a,8,8a-hexahydro-2,3,8-methenocyclopentindene ☆ Author links open overlay panel Mircea D. Banciu a Emilia Olteanu b Constantin Drăghici b Aurica Petride b Mariana Dănilă bCited by: 7.

Valence isomers of annulenes and their derivatives. Professor Balaban described the procedure allowing the first exhaustive enumeration of annulene valence isomers, and published the first 3-volume monograph on these valence isomers.

Topological indices and other molecular descriptors. Benzo-Hetero- Computed E 2g modes of vibration (ω m) of [30]annulene are shown in Fig. are classified into carbon ring deformation (ω 1 and ω 2), C–C stretching coupled with C–H bending (ω 13, ω 14, and ω 15), and C–H stretching (ω 17).As mentioned earlier, these vibrational modes play an essential role in the Jahn–Teller distortions in the mono- and trianions of [30] by: 5.

Abstract. Six-membered rings with one heteroatom are aromatic when there is a continuous conjugation involving six delocalized electrons.

The main-group heteroatom from groups 16–13 of the periodic system can be (ordered approximately according to decreasing electronegativity): O +, S +, Se +, Te +, NR +, N + —O −, N, P, PR 2, As, Sb, Bi, SiR, GeR, BR −, and GaR −.Cited by: 9.

The valence isomers are not restricted to isomers of benzene. Valence isomers are also seen in the series (CH) 8. Due to the larger number of units, the number of possible valence isomers is also greater and at least Valence isomers of cyclooctatetraene.

The properties of flat aromatic molecules are well known to chemists, but some non-planar aromatics remain a mystery. A molecule that can twist into Cited by: Similarly, all valence isomers of [2k]-annulenes can be found as cubic graphs with 2k vertices.

Isomers share molecular formulas(e.g., there are over isomers for And Their Valence Isomers book 6 H 6), but valence isomers share partition formulas according to numbers of n-ary carbon atoms, e.

C (CH) 4 (CH 2) or C 2 (CH) 2 (CH 2) 2. For (CH) 6 there are only 5 planar Author: Alexandru T. Balaban. Abstract. Whereas molecular (constitutional) formulas have been modeled by graphs for more than a century, since Cayley counted alkane isomers by means of 4-trees, modeling of chemical reactions and of chemical reactivity by means of graphs is of more recent date.

Follow Alexandru T. Balaban and explore their bibliography from 's Alexandru T. Balaban Author Page. Complexity, sphericity, and ordering of regular and semiregular polyhedra Article (PDF Available) in MATCH Communications in Mathematical and in Computer Chemistry 54(1) January Abstract. An application of alkyne metathesis to 1,2-di(propynyl)arenes, producing dehydrobenzannulenes, is described.

An efficient method for selective Sonogashira couplings of bromoiodoarenes under conditions of microwave irradiation is also by: FVP of the title oxazole (1) at oC and mm Hg afforded a complex reaction mixture containing benzonitrile, phenylacetonitrile, biphenyl, diphenylmethane, fluorene, o-benzylbenzonitrile (major product, 22%), phenanthrene, anthracene, 9,anthraquinone, 2-phenylindole and 3-phenylindole.

A radical and carbene mechanism was suggested in order to rationalize the formation of the reaction Author: Mircea D. Banciu, Daniela Istrati, Dan Mihaiescu, Constantin Draghici. Cage Compounds of Heavier Group 14 Elements. December ; ChemInform 34(46) DOI: /pat In book: Patai's Chemistry of Functional Groups Annulenes, Benzo- Hetero.

Un domeniu în care grafurile cubice (sau trivalente) joacă un rol dominant este enumerarea izomerilor (CH)n de valență ai [n]anulenelor unde n este un număr par. Balaban a publicat înîmpreună cu doi coautori, o monografie cu trei volume pe această temă (Anulene, Benzo- Hetero- Homo-derivați și izomerii lor de valență Cetățenie: România, SUA.

One area in which cubic (or trivalent) graphs play a dominant role is the enumeration of [n]annulene valence isomers (CH) n where n is an even number. With two coauthors, Dr. Balaban published in on this topic a 3-volume monograph (Annulenes, Benzo- Hetero- Homo-Derivatives and Their Valence Isomers, CRC Press).

Annulenes, Benzo- Hetero- Homo-Derivatives and Their Valance Isomers avg rating — 0 ratings — published Want to Read saving. Annulenes, benzo- hetero- homo-derivatives and their valence isomers.

Boca Raton. (társszerzőkkel) Fotostabilizarea polimerilor cu amine împiedicate steric. București. (társszerzőkkel) C.D. Nenițescu: Viața și opera. București. (Mircea D. Banciuval) Topological indices and related descriptors in QSAR and QSPR. Annulenes, benzo- hetero- homo-derivatives and their valence isomers: Aromaticity in heterocyclic compounds: Benzenoids with maximum Kekule structure counts for given numbers of hexagons: C.D.

Nenițescu: viața și opera: C.D. Nenitzescu: life and scientific work: Chemical applications of. A fost redactată monografia în trei volume " Annulenes, -Benzo, -Hetero, -Homo-Derivatives and their valence isomers", autori A.T. balaban, M. Banciu, V.

Ciorba, CRC Press-Boca Raton,citată în peste de lucrări de specialitate. The synthetic precursors to 1, the indeno[1,2-b]fluorene-6,diones (IF-diones, 2, Figure 1) have also been explored as an active layer in first reported IF-dione OFET utilized 3 – while the solid-state structure of 3 showed several sub-van der Waals contact distances, the n-type mobility of the OFET was very low (2 × 10 −5 cm 2 V −1 s −1).Cited by:   The emission properties of the 5AP derivatives were examined in CHCl 3 ().According to a previous report, 10 it is known that the S 0-S 1 transition of 5AP is attributed to a lone pair orbital-π Cited by: 5.

Page Issue in Honor of Prof. Alexandru T. Balaban ARKIVOC (x) Mean-field resonance-theoretic view of benzenoid networks D. Klein* and T. Ivanciuc Texas A&M University @ Galveston, Galveston, TXUSA E-mail: [email protected] (received 8 Aug 05; accepted 3 Nov 05; published on the web 8 Nov 05) Abstract A simple classically based “mean field” resonance Cited by: 1.

Annulenes Annulenes Annulenes are monocyclic compounds containing alternating ring double bonds, such as benzene, but of different sizes. According to systematic nomenclature, benzene is a [6]annulene, while cyclobutadiene is [4]annulene, whereas cyclooctatetraene is an [8]annulene, for instance.

This essay contains personal views about mathematical chemistry — mainly with nonnumerical and non-quantumflavor. Similarities between mathematics and chemistry are pointed out, mainly based on the invention aspect of these two sciences, in contrast to discoveries characterizing most natural : T BalabanAlexandru.

The synthetic precursors to 1, the indeno[1,2-b]fluorene-6,diones (IF-diones, 2, Fig. 1) have also been explored as an active layer in first reported IF-dione OFET utilized 3 – while the solid-state structure of 3 showed several sub-van der Waals contact distances, the n-type mobility of the OFET was very low (2 × 10 −5 cm 2 V −1 s −1) [].Cited by: Tenured Professor of Chemistry, Texas A&M University Galveston Vice President, Roumanian Academy.

Senior Research Officer, Chemistry Division, International Atomic Energy Agency, Vienna, Austria, in charge with radiopharmaceuticals.

Head of the Laboratory (along with didactic activity), Isotopically Labelled Compounds of the Bucharest Institute of. Tautomerism - Delocalized Chemical Bonding - Introduction - This book explains the theories and examples of organic chemistry, providing the most comprehensive resource about organic chemistry available.

Readers are guided on planning and execution of multi-step synthetic reactions, with detailed descriptions of all the reactions. The 7th edition proves again it is a must-have desktop. The aromatic character of [10]annulenes and dicupra[10]annulenes from current density calculations.

Physical Chemistry Chemical Physics20 (3), DOI: /C7CPK. Aishvaryadeep Kaur, Manjinder Kour, Raakhi Gupta, Raj K. Bansal. Chemical structures of benzoannulenes 1 a–c and 3 a–c, platinum catecholate complexes 2, 4, and 5, cyclotriveratrylene‐type platinum catecholate complex 6, and model complexes 7 and 8.

On the other hand, use of the well‐known redox chemistry of a metal catecholate complex for the stabilization of aromatic cationic species has never been Cited by: 2. Scientific Publications of Alexandru T. Balaban A. Books A. Edited Books. A.T. Balaban (scientific editor): “Analytical Control of Radiopharmaceuticals”, International Atomic Energy Agency, Vienna,Proceedings of a Panel, July pages.

or to (Z,Z,E,Z,Z,E) geometrical isomers. The Z/E nomenclature is incomplete for annulenes, for the molecules will exhibit a form of atropisomerism conformations related to each other by formal rotations around single bonds, yet reasonably frozen into their geometries The relative energies of the annulenesCited by: Their molecule incorporates a ‘porphyrin’ structure (Fig.

1b). Porphyrins Annulenes are cyclic hydrocarbons that contain alternating single and double bonds, as shown Hetero- Homo-Derivatives and their Valence Isomers Vol.

1, 67–98 (CRC Press, Boca Raton, FL, ). MIRCEA DESIDERIU BANCIU Member of the Romanian Academy President of the Chemistry Sciences Section “Annulenes, Benzo- Hetero- Homoderivatives and their Valence Isomers”; 3 volumes; CRC-Press, Boca Raton, Fla, ; different book-chapters in USA.

The results of ab initio calculations of static electric properties of a series of cyclic conjugated ketones and thioketones are presented.

Dipole moments, dipole polarizabilities, as well as the first and second hyperpolarizabilities, were evaluated at different levels of theory: SCF, CASSCF, MP2, CCSD, CCSD(T), and CASPT2 methods were used. Both MP2 and CASPT2 methods have been shown to Cited by: Synthesis, Spectroscopy, and Theoretical Calculations for a Series of Push-Pull [14]-Pyridoannulenes Matthew G.

Lauer, James W. Leslie, Ashley Mynar, Shelly A. Stamper, Optical absorption and emission properties of the dipyridoannulenes and their corresponding A. Annulenes: Benzo- Hetero- Homo-DeriVatiVes, and Their Valence Isomers. pair of isomers ( ratio) could not be separated.

The major isomer showed its internal methyl protons at ä and, while those of the minor were at ä and Synthesis of cyclopentadienide derivatives proceeded from 5, which we reported in preliminary form in d The route used to 5 is shown in Scheme 1.

Novel tetraalkoxyphenanthrene‐fused dehydro[12]‐, [18]‐, and [24]annulenes 1–3 were synthesized by using Cu‐mediated or Pd‐catalyzed oxidative macrocyclization reactions as key steps, and their electronic, optical, and electrochemical properties have been investigated in detail.

X‐ray crystallographic analysis of a single crystal of 1 a demonstrated that the molecules were.Valence isomers of annulenes (CH)2k. The next problem I turned my attention to involved valence isomers of [n]annulenes.

In Bucharest, the first of such isomers of (CH)10 had been prepared (Avram et al. ), and Doering called it the Nenitzescu hydrocarbon (Doering & Rosenthal ).