Relevant bibliographies by topics / Cycloheptatrienes

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  2. Dissertations / Theses
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Academic literature on the topic 'Cycloheptatrienes'

Author: Grafiati
Published: 4 June 2021
Last updated: 3 February 2022

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Journal articles on the topic "Cycloheptatrienes"

1

Nubbemeyer, Udo, Analuisa Nava, Lukas Trippe, Andrea Frank, Lars Andernach, and Till Opatz. "Synthesis of Optically Active Hydroxyalkyl Cycloheptatrienes: A Key Step in the Total Synthesis of 6,11-Methylene-LXB4." Synlett 32, no. 01 (2020): 45–50. http://dx.doi.org/10.1055/s-0040-1707282.

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AbstractStarting from methyl cycloheptatrienyl-1-carboxylate, 6-acylation was successfully achieved employing glutaryl chloride in the presence of AlCl3 under controlled reaction conditions to furnish keto carboxylic acid product. After protection of this keto carboxylic acid as tert-butyl ester, reagent-controlled enantioselective reductions delivered configuration-defined methyl-6-hydroxylalkyl cycloheptatriene-1-carboxylates with up to 80% ee. Whereas simple NaBH4 reduction of the keto carboxylic acid and subsequent lactonization afforded a methyl-6-tetrahydropyranonyl cycloheptatriene-1-ca
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2

Kreiter, Cornelius G., Karl Heinz Franzreb, Wolfgang Michels, Ulrich Schubert, and Klaus Ackermann. "Gehinderte Ligandbewegungen in Übergangsmetallkomplexen, XXVIII [1] Photochemische C–H-Aktivierung an 1,3,5-Cycloheptatrien durch Rhenium(O) / Hindered Ligand Movements in Transition Metal Complexes, XXVIII [1] Photochemical C–H-Activation at 1,3,5-Cycloheptatriene by Rhenium(O)." Zeitschrift für Naturforschung B 40, no. 9 (1985): 1188–98. http://dx.doi.org/10.1515/znb-1985-0916.

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Decacarbonyl-dirhenium(O) (1) photochemically cleaves C-H-bonds in 1,3,5-cycloheptatriene (2 ) and forms two isomeric Re2(CO)8(μ-H)(μ-η2:1-cycloheptatrienyl) complexes (3, 4). In addition Re(CO)3(η5-cycloheptatrienyl) (5) and Re(CO)3(η5-cycloheptadienyl) (6) are obtained. The complexes 3 and 4 show temperature dependent 1H NMR spectra due to hindered ligand movements of the cycloheptatrienyl bridges with activation barriers of ⊿G≠207 = 39.9±2 kJ mol-1 and ⊿G≠255 = 48.0±2 kJ mol-1. 3 and 4 achieve in a thermal reaction an equilibrium with populations of 0.03 and 0.97 at 350 K with ⊿G≠350 - 96.5
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Bajorek, T., and N. H. Werstiuk. "UV photoelectron spectroscopic and computational study of 7-substituted cycloheptatrienes." Canadian Journal of Chemistry 86, no. 5 (2008): 444–50. http://dx.doi.org/10.1139/v08-041.

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The He(I) photoelectron (PE) spectra of cycloheptatriene (1), 7-methylcycloheptatriene (2), 7-methoxycycloheptatriene (3), 7-methylthiocycloheptatriene (4), and 7-diemthylaminocycloheptatriene (5) were recorded and interpreted using MO energies and ionization potentials acquired from B3PW91 calculations. Partial simulated PE spectra were in good agreement with the experimental results. The axial and equatorial conformers have distinct PE spectra as illustrated by simulation. The PE spectra of 2, 3, and 5 are representative of the equatorial conformers, while the PE spectrum of 4 was in accord
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4

Ter Borg, A. P., and H. Kloosterziel. "The chemistry of cycloheptatriene: Part X: Photochemical shift of hydrogen in cycloheptatrienes." Recueil des Travaux Chimiques des Pays-Bas 84, no. 2 (2010): 241–44. http://dx.doi.org/10.1002/recl.19650840211.

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ter Borg, A. P., H. Kloosterziel, and Y. L. Westphal. "The chemistry of cycloheptatriene. Part XIV: Hydrogen shifts in (4-Dimethylaminophenyl)cycloheptatrienes." Recueil des Travaux Chimiques des Pays-Bas 86, no. 5 (2010): 474–80. http://dx.doi.org/10.1002/recl.19670860502.

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Coşkun, Ahmet, Murat Güney, Arif Daştan, and Metin Balci. "Oxidation of some alkoxy-cycloheptatriene derivatives: unusual formation of furan and furanoids from cycloheptatrienes." Tetrahedron 63, no. 23 (2007): 4944–50. http://dx.doi.org/10.1016/j.tet.2007.03.145.

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ter Borg, A. P., E. Razenberg, and H. Kloosterziel. "The Chemistry of Cycloheptatriene Part XII: The thermal behaviour of substituted cycloheptatrienes: Preliminary communication." Recueil des Travaux Chimiques des Pays-Bas 84, no. 9 (2010): 1230–32. http://dx.doi.org/10.1002/recl.19650840914.

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8

Mishima, Masaaki, Tomomi Kinoshita, Yoshitaka Hattori, and Ken'ichi Takeuchi. "Gas-Phase Acidities of Cycloheptatrienes: Effects of Alkyl Groups on the Stability of Carbanions." European Journal of Mass Spectrometry 8, no. 5 (2002): 359–66. http://dx.doi.org/10.1255/ejms.499.

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The gas-phase acidities of 7-alkyl substituted cycloheptatrienes have been determined by Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometry using a proton-transfer equilibrium method, Δ G0acid (kJ mol−1): methyl 1520.0, ethyl 1516.7, n-propyl acid 1513.3, i-propyl 1512.1, n-butyl 1510.4. The effect of alkyl groups on the acidity of cycloheptatriene is linearly correlated with the polarizability parameters ( σα) of substituents, giving a ρα of–55.3 (kJ σ−1α unit). The magnitude of pa is half of that for RCH3 and is significantly larger than that for the fluorene series. These
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Grubert, L., D. Jacobi, and W. Abraham. "Electrochemical oxidation of aryl cycloheptatrienes." Journal für praktische Chemie 341, no. 7 (1999): 620–30. http://dx.doi.org/10.1002/(sici)1521-3897(199910)341:7<620::aid-prac620>3.0.co;2-s.

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10

Çelik, Murat, and Metin Balci. "The substituent effect on the cycloheptatriene-norcaradiene equilibrium. Reaction of singlet oxygen with substituted cycloheptatrienes." Arkivoc 2007, no. 8 (2006): 150–62. http://dx.doi.org/10.3998/ark.5550190.0008.814.

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Dissertations / Theses on the topic "Cycloheptatrienes"

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Wang, Yahui. "Gold Carbenes from Cycloheptatrienes: Generation and Fate." Doctoral thesis, Universitat Rovira i Virgili, 2014. http://hdl.handle.net/10803/319950.

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Els Carbens metàl · lics són un dels intermedis reactius fonamentals en la síntesi orgànica i han estat àmpliament utilitzats en la construcció de molècules complexes. Molts metalls de transició són coneguts per catalitzar la descomposició dels derivats de diazo com un mètode potent per generar carbens metàl · lics. Atès l'interès del nostre grup de recerca en el desenvolupament de noves transformacions catalitzades per or, trobem un nou mètode per generar or(I) carbens a través de la reacció de retro-Buchner del tautómer norcaradiene basat en l'equilibri conegut de cicloheptatrien i norcar
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2

Beniazza, Redouane. "Synthèse et désymétrisation de cycloheptatriènes silylés : application à la synthèse de mimes de sucres." Thesis, Bordeaux 1, 2009. http://www.theses.fr/2009BOR13898/document.

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Cette thèse a porté sur la synthèse de cycloheptatriènes (CHT) silylés et leur désymétrisation pour l’obtention de mimes de sucres. Nous avons ainsi développé une approche synthétique d’analogues de calystégines et mis en évidence un réarrangement inattendu conduisant à un squelette nortropane original. Dans un second temps, nous avons étudié l’équilibre cycloheptatriène-norcaradiène (CHT-NCD) et mis au point une méthodologie de cycloaddition de CHT silylés avec des dérivés nitroso, efficace et hautement stéréosélective, pour la synthèse d’aminocarbasucres via une cascade : électrocyclisation
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3

Neigenfink, Jan. "Macrocyclen mit Cycloheptatrieneinheiten." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 1998. http://dx.doi.org/10.18452/14338.

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Ziel der vorliegenden Arbeit ist die Erschließung eines neuen, synthetischen Zugangs zu linearen und makrocyclischen Systemen, die als Strukturelement eine Cycloheptatrieneinheit besitzen. Hierbei kann das Cycloheptatrien aufgrund seiner zahlreichen Transformationsmöglichkeiten als ein molekularer Schalter angesehen werden. Durch photochemische Reaktionen könnte auf diese Weise der Informationsgehalt supramolekularer Systeme verändert werden. Um eine verbesserte Photoschaltbarkeit zu gewähren, werden bisarylsubstituierte Cycloheptatriene benötigt. Verbrückte Aryltropyliumsalze werden durch Ums
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Jacobi, Dirk. "Aryltropyliumionen." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 1998. http://dx.doi.org/10.18452/14342.

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Arylsubstituierte Cycloheptatriene unterscheiden sich in ihrer Lichtabsorption, Molekülgeometrie und Elektronen- Donatorstärke gravierend von den korrespondierenden Aryltropyliumionen. Die Änderung der elektronischen Eigenschaften bei der Umwandlung der Arylcycloheptatrien- in die Aryltropyliumspezies ist daher potentiell nutzbar, um nichtkovalente Bindungskräfte in supramolekularen Einheiten mit Cycloheptatrienbausteinen zu beeinflussen. Licht stellt als ein energetisch und mit hoher örtlicher Auflösung selektiv anwendbares Reagenz ein besonders interessantes Werkzeug für die Verwirklichung s
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Yin, Xiang. "Synthesis of Indenes and Indanes by Gold(I)-Catalyzed Decarbenation." Doctoral thesis, Universitat Rovira i Virgili, 2018. http://hdl.handle.net/10803/665105.

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Els derivats de 7-substituts de 1,3,5-cicloheptatrienes reaccionen amb catalitzadors d'or (I) catiònic que donen carbens d'or (I) per una reacció retro-Buchner en què dos enllaços C-C en Norcaradienes són trencats per Au (I). Aquesta nova estratègia obvia l'ús de derivats diazo sensibles a xocs i genera carbens metàl·lics reactius in situ que poden experimentar diverses transformacions més, com ara la ciclopropanació d'alquens externs i reticulats i les reaccions tipus Friedel-Crafts intramoleculars. Per ampliar la gamma de mètodes sintètics i aplicacions disponibles per a aquests intermedis ú
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6

Sudemen, Burak M. "Addition Of 1,3-dicarbonyl Compounds To The Cycloheptatriene Derivatives." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/12611245/index.pdf.

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The one electron oxidant Mn(OAc)3 has been used for years for the oxidative addition of 1,3-dicarbonyls to alkenes to give dihydrofuranes. Since cycloheptatriene is in equilibrium with its valance isomer norcaradiene, it will be interesting to study the reaction of CHT derivatives with Mn(OAc)3 in the presence of 1,3-dicarbonyls. In our research, we have observed that unsubstituted cycloheptatriene gave CHT based products. However, when electron withdrawing -CN group was attached to C-7 position of CHT we obtained norcaradiene based products. We have also observed that there exist an equilibri
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Winter, Angelika Maria. "Cycloheptatrienyl pincer iridium complexes an experimental and theoretical approach /." [S.l. : s.n.], 2004. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB10976227.

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Kunst, Andreas Klaus. "Synthese und Reaktivität von verbrückten und unverbrückten Cycloheptatrienyl-Cyclopentadienyl-Übergangsmetallkomplexen." [S.l.] : [s.n.], 2006. http://www.digibib.tu-bs.de/?docid=00014002.

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Ng, Kee-Pui Dennis. "The chemistry of η-cycloheptatrienyl derivatives of molybdenum and tungsten". Thesis, University of Oxford, 1993. http://ora.ox.ac.uk/objects/uuid:b41ab51d-7f86-4989-8b34-3d3e06627c9c.

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This thesis describes the synthetic, structural and reactivity studies of η- cycloheptatrienyl-molybdenum and -tungsten chemistry. Chapter 1 presents an overview of the chemistry of η-cycloheptatrienyl derivatives of transition metals, in particular group 6 metals. The functional group properties of the η-cycloheptatrienyl ligand are also discussed. Chapter 2 describes the synthesis of [Mo(η-C<sub>7</sub>H<sub>7</sub>)(η<sup>5</sup>-C<sub>7</sub>H<sub>9</sub>)] from Mocl<sub>5</sub> or [MoCl<sub>4</sub>(thf)<sub>2</sub>], which provides a convenient route to η-cycloheptatrienyl-molybdenum comp
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Tröndle, Sabrina [Verfasser]. "Phosphanfunktionalisierte Cycloheptatrienyl-Cyclopentadienyl-Titankomplexe als reduzierende Liganden in der homogenen Katalyse / Sabrina Tröndle." München : Verlag Dr. Hut, 2019. http://d-nb.info/1181514835/34.

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Books on the topic "Cycloheptatrienes"

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Robinson, Peter Mark. The chemistry of substituted cycloheptatrienes. University of Manchester, 1992.

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Davies, Edward Stephen. The synthesis, structure and reactivity of bimetallic cycloheptatrienyl complexes. University of Manchester, 1994.

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3

Hussain, Zafar Imran. The organometallic chemistry of cycloheptadienyl and cycloheptatrienyl complexes of molybdenum and tungsten. University of Manchester, 1996.

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Roberts, Andrew. The synthesis and reactivity of ring-substituted cycloheptatrienyl complexes of the chromiumtriad metals. University of Manchester, 1994.

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5

Grime, Richard. The synthesis, structure and reactivity of cycloheptatrienyl complexes of molybdenum containing [eta]1-bonded organic ligands. University of Manchester, 1994.

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6

Burnett, Ian James. Synthesis of substituted cycloheptatrienes: Approaches to 1,6-diaminocycloheptatriene. 1995.

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Book chapters on the topic "Cycloheptatrienes"

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Cotton, F. A., J. A. Mccleverty, J. E. White, R. B. King, A. F. Fronzaglia, and M. B. Bisnette. "Tricarbonyl(Cycloheptatriene)-Molybdenum(0)." In Inorganic Syntheses. John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470132593.ch9.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of η-cycloheptatrienyl derivative of molybdenum." In Magnetic Properties of Paramagnetic Compounds. Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-49202-4_543.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of η-cycloheptatrienyl derivative of molybdenum." In Magnetic Properties of Paramagnetic Compounds. Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-49202-4_544.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of η-cycloheptatrienyl derivative of molybdenum." In Magnetic Properties of Paramagnetic Compounds. Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-49202-4_545.

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Vogt, J. "650 C7H6O2 2-Hydroxy-2,4,6-cycloheptatrien-1-one." In Asymmetric Top Molecules. Part 3. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-14145-4_72.

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Vogt, J. "647 C7H6ArO2 2-Hydroxy-2,4,6-cycloheptatrien-1-one - argon (1/1)." In Asymmetric Top Molecules. Part 3. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-14145-4_69.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of complex obtained by intercalation of η-cycloheptatrienyl molybdenum into ZrS2." In Magnetic Properties of Paramagnetic Compounds. Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-49202-4_304.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of complex obtained by intercalation of η-cycloheptatrienyl tungeston into ZrS2." In Magnetic Properties of Paramagnetic Compounds. Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-49202-4_305.

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Goldschmidt, Zeev, and Hugo E. Gottlieb. "Cyclobutane-Cyclopentane Interconversion of Coordinated Adducts of Cycloheptatriene and Tetracyanoethylene Via the [2,2]-Sigmahaptotropic Rearrangement." In Strain and Its Implications in Organic Chemistry. Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-0929-8_18.

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Koo, S. "Cycloheptatrienes." In Monocyclic Arenes, Quasiarenes, and Annulenes. Georg Thieme Verlag KG, 2010. http://dx.doi.org/10.1055/sos-sd-045-01469.

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Conference papers on the topic "Cycloheptatrienes"

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Benzler, J., S. Linkersdörfer, K. Luther, and J. Troe. "Relaxation of highly vibrationally excited cycloheptatriene in liquids and gases studied by picosecond UV absorption spectroscopy." In The 54th international meeting of physical chemistry: Fast elementary processes in chemical and biological systems. AIP, 1996. http://dx.doi.org/10.1063/1.50190.

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