Dissertations / Theses on the topic 'Alkine'
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Peter, Sebastian. "Oxyfunctionalization of alkanes, alkenes and alkynes by unspecific peroxygenase (EC 1.11.2.1)." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-113321.
Die Gruppe der Unspezifischen Peroxygenasen (EC 1.11.2.1) umfasst extrazelluläre Häm-Thiolat-Enzyme, die mittels H2O2 als Cosubstrat die selektive Monooxygenierung unterschiedlicher organischer Verbindungen katalysieren. In der vorliegenden Arbeit konnte gezeigt werden, dass die von Agrocybe aegerita sekretierte Peroxygenase (AaeUPO) verschiedene lineare (z. B. n-Hexan), verzweigte (z. B. 2,3-Dimethylbutan) und zyklische Alkane (z. B. Cyclohexan) hydroxyliert. Die Größe der von der AaeUPO umgesetzten Substrate reichte vom gasförmigen Propan (C3) bis hin zu n-Hexadekan (C16). Die Alkane wurden bevorzugt am zweiten und dritten Kohlenstoffatom (C2 und C3) hydroxyliert; eine Hydroxylierung am terminalen Kohlenstoff konnte nur vereinzelt und in geringem Umfang beobachtet werden. Die Überoxidationen der primär gebildeten, sekundären Alkohole führte außerdem zur Entstehung der entsprechenden Ketonderivate. Darüber hinaus wurde eine Vielzahl linearer terminaler (z. B. 1-Hepten), verzweigter (z. B. 2-Methyl-2-Buten) und zyklischer Alkene (z. B. Cyclopenten) sowie linearer und zyklischer Diene (1,3-Butadien, 1,4-Cyclohexadien) durch die AaeUPO epoxidiert. Die Umsetzung terminaler Alkine (z. B. 1-Octin) führte zur Entstehung der jeweiligen 1-Alkin-3-ole. Manche dieser Reaktionen verliefen ausgeprägt regioselektiv und, im Falle der linearen Alkane sowie der linearen terminalen Alkene und Alkine, mit mittlerer bis hoher Stereoselektivität. So ergab beispielsweise die Umsetzung von n-Octan einen Enantiomerenüberschuss größer 99% für (R)-3-Octanol; die Epoxidierung von 1-Hepten lieferte einen Enatiomeerenüberschuss (ee) von bis zu 72% für das (S)-Enantiomer. Die katalytischen Effizienzen, die für die Hydroxylierung bzw. Epoxidierung der Modellverbindungen Cyclohexan und 2-Methyl-2-Buten ermittelt wurden, betragen 2.0 × 103 M-1 s-1 und 2.5 × 105 M−1 s−1. Der ausgeprägte Deuterium-Isotopen-Effekt, der im Zuge der Umsetzung von semideuteriertem n-Hexan beobachtet wurde sowie die Ergebnisse des Radical-Clock-Experiments mit Norcarane als Substrat bestätigten, dass die Hydroxylierung von Alkanen über Wasserstoffabstraktion, die Bildung eines Substratradikals und anschließende direkte Sauerstoffrückbindung verläuft. Die Stopped-Flow-Experimente belegen zudem das Auftreten eines Porphyrin-Kationradikal-Intermediates (Compound I; AaeUPO-I) im katalytischen Zyklus der AaeUPO (vergleichbar mit dem reaktiven Intermediat der P450-Monooxygenasen)
Haak, Edgar. "Titankatalysatoren für die intermolekulare Hydroaminierung von Alkinen und Alkenen." [S.l. : s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=964517639.
Belting, Volker [Verfasser]. "Gold-katalysierte Cycloisomerisierung funktionalisierter Alkine / Volker Belting." Dortmund : Universitätsbibliothek Technische Universität Dortmund, 2011. http://d-nb.info/1018083588/34.
Seiffert, Grażyna Bernadeta. "Structural and functional studies on two molybdopterin and iron-sulfur containing enzymes transhydroxylase from pelobacter acidigallici and acetylene hydratase from pelobacter acetylenicus /." [S.l. : s.n.], 2007. http://nbn-resolving.de/urn:nbn:de:bsz:352-opus-39357.
Haberlag, Birte [Verfasser]. "Entwicklung von Katalysatoren für die Metathese interner und terminaler Alkine / Birte Haberlag." München : Verlag Dr. Hut, 2013. http://d-nb.info/1033041378/34.
Merkel, Roswitha. "Untersuchung zur Synthese und Eigenschaften von komplexen Oligospiroketalen." Phd thesis, Universität Potsdam, 2014. http://opus.kobv.de/ubp/volltexte/2015/7256/.
In this dissertation the use of rigid Oligospiroketal (OSK)-rods as basic model for 2D- and 3D-systems was shown. For that purpose a bifunctionalized rigid rod was synthesized and was used in Azide-Alkine-clickreaction with itself and with other branched functionalized units. By theoretical calculations a statement about the novel bimodulation of the conformation of two OSK-rods which are linked by a clickreaction could be made. “Articulated rod” was introduced as new term, because the molecules could exist elongated or buckled. Based on this knowledge it became apparent that not only the size selective synthesis of polymers by using up to four OSK-rods is possible but also cycles with OSK-rods by using different click-reaction conditions can be synthesized. The newly developed group of “articulated rod” substances was examined regarding the equilibrium between buckled and elongated “articulated rod”. That for the articulated rod was functionalized with pyrenyl moieties in terminal position. By fluorescence measurements of these rods it could be shown that the equilibration is influenced by different temperatures and different solvents. For multiple applications a simplified strategy for synthesis with a wide range of functionalization in only one step of synthesis could be achieved. Photoactive articulated rods were synthesized, that could be selectively intramolecular dimerized. Additionally, amino acids were introduced as linker at the end of a articulated rod. By this a stereoselective synthesis of multiple functionaliations is possible. By the synthesis of complex articulated rods a novel field of research was found. There is a wide potential of research for more applications for example in biology (as molecular switch for transportation of ions) and in materials chemistry (as transporter for charge or energy).
Wutke, Jens. "Synthesen und Reaktionen von Ethinylaziden." Doctoral thesis, Universitätsbibliothek Chemnitz, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-61560.
Schreiner, Ella [Verfasser], and Thomas J. J. [Akademischer Betreuer] Müller. "Multikomponentenreaktionen auf Basis der Kupfer(I)-katalysierten Carboxylierung terminaler Alkine / Ella Schreiner. Betreuer: Thomas J. J. Müller." Düsseldorf : Universitäts- und Landesbibliothek der Heinrich-Heine-Universität Düsseldorf, 2015. http://d-nb.info/1075317002/34.
Erb, Benjamin [Verfasser], and Lukas J. [Akademischer Betreuer] Gooßen. "Nachhaltigkeit in der organischen Synthese - Stoffliche Nutzung nachwachsender Rohstoffe und Alkoxylierung terminaler Alkine / Benjamin Erb. Betreuer: Lukas J. Gooßen." Kaiserslautern : Technische Universität Kaiserslautern, 2016. http://d-nb.info/1108270441/34.
Roy, Pascal [Verfasser], and Adelheid [Akademischer Betreuer] Godt. "Funktionalisierte Linker für Metallorganische Gerüstverbindungen, deren postsynthetische Modifikation und polar markierte Schutzgruppen für terminale Alkine / Pascal Roy ; Betreuer: Adelheid Godt." Bielefeld : Universitätsbibliothek Bielefeld, 2011. http://d-nb.info/1151638390/34.
Groaz, Elisabetta. "Alkene and alkyne metathesis reactions using ruthenium initiators." Thesis, King's College London (University of London), 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.440449.
Arndt, Matthias [Verfasser], and Lukas J. [Akademischer Betreuer] Gooßen. "Hydroamidierung und Carboxylierung terminaler Alkine - Entwicklung effizienter Katalysatorsysteme, Anwendung in der Naturstoffsynthese und mechanistische Studien / Matthias Arndt. Betreuer: Lukas J. Gooßen." Kaiserslautern : Technische Universität Kaiserslautern, 2013. http://d-nb.info/103663793X/34.
Mehta, Brinda Mayank. "Green Resins based on Alkene- and Alkyne-containing Triglycerides." University of Akron / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=akron1468795161.
Werner, Kristin. "On the Role of Oxygen Vacancies in the Surface Chemistry of Ceria (CeO2)." Doctoral thesis, Humboldt-Universität zu Berlin, 2019. http://dx.doi.org/10.18452/20496.
In recent years, ceria (CeO2) has attracted much scientific interest due to its activity as a catalyst in the selective hydrogenation of alkynes to alkenes. To gain further insights into the role of CeO2 in propyne hydrogenation, this thesis explores the fundamental processes of H2, CO2, and propyne adsorption, as well as the interaction of hydroxyls and propyne on well-defined CeO2(111) surfaces. A special emphasis thereby lies on the role of oxygen (O) vacancies in these processes.
Hoffmann, Florian. "Synthese und Reaktivität von Übergangsmetallkomplexen mit Alkinylsilyl-Liganden." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2009. http://nbn-resolving.de/urn:nbn:de:bsz:105-412254.
Brunner, Andreas Verfasser], Lukas [Akademischer Betreuer] [Gutachter] Hintermann, and Aymelt [Gutachter] [Itzen. "Anwendungen der Ruthenium-katalysierten anti-Markovnikov-Hydratisierung terminaler Alkine in der organischen Synthese / Andreas Brunner. Betreuer: Lukas Hintermann. Gutachter: Aymelt Itzen ; Lukas Hintermann." München : Universitätsbibliothek der TU München, 2016. http://d-nb.info/1102355364/34.
Edwards, Andrew R. "Polyfluorinated alkenes and alkynes." Thesis, Durham University, 1997. http://etheses.dur.ac.uk/4772/.
Pongtavornpinyo, Ruti. "Indium Carbenes Alkenes and Alkanes." Thesis, Imperial College London, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.508494.
Schreyer, Matthias Alexander [Verfasser], Lukas [Akademischer Betreuer] Hintermann, Lukas [Gutachter] Hintermann, and Wolfgang [Gutachter] Eisenreich. "Katalytische Hydratisierung terminaler Alkine: Mechanistische Untersuchung CpRu+-basierter Katalysatorsysteme und systematisches Aktivitätsscreening / Matthias Alexander Schreyer ; Gutachter: Lukas Hintermann, Wolfgang Eisenreich ; Betreuer: Lukas Hintermann." München : Universitätsbibliothek der TU München, 2018. http://d-nb.info/1173899065/34.
Stein, Thomas. "Bi- und oligonukleare Komplexe basierend auf Metallorganischen pi-Pinzetten." Doctoral thesis, Universitätsbibliothek Chemnitz, 2001. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-200100550.
Filipczyk, Grzegorz Paweł. "Ferrocenyl-Alkynes and Butadiynes: Reaction Behavior towards Cobalt and Iron Carbonyl Compounds." Doctoral thesis, Universitätsbibliothek Chemnitz, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-231913.
The present PhD study focuses on the synthesis and characterization of novel perferrocenylated cyclic complexes utilizing cobalt - mediated cyclomerization in combination with C–H bond activation as well as formation of ferrocenylated phosphino-alkyne compounds with iron and cobalt carbonyls. Electrochemical properties and electron-transfer processes between terminal ferrocenyl units in the diverse cyclic compounds are explored in relation to the chemical composition of the building blocks connecting them. Eleven perferrocenylated cyclic compounds were obtained via [2 + 2] and [2 + 2 + 2] cyclomerization of 1,4-diferrocenylbutadiyne FcC≡C–C≡CFc (Fc = Fe(η5-C5H4)(η5-C5H5)) by the reaction with dicarbonylcyclopentadienylcobalt Co(η5-C5H5)(CO)2. They are subdivided into three groups: (i) products of cyclodimerization with additional chain extension, possessing cyclobutadienyl moieties as a central linkage unit (3a,b and 4a,b), (ii) products of cyclodimerization with consecutive CO insertion (6a,b,c and 7), and (iii) products of cyclotrimerization followed by cycle formation via C–H bond activation (5a,b,c). Optimization of the reaction conditions was made in order to maximize the amount of each group of compounds. Furthermore, another part of this research work focuses on diverse reaction patterns of (ferrocenylethynyl)diphenylphosphane with diironnonacarbonyl and dicobaltocta-carbonyl. Six mixed carbonyl and ferrocenyl-functionalized phospinoalkynyl compounds of iron(0) and cobalt(0) were obtained and characterized
Naohisa, Nakagawa. "Selective Synthesis of Alkynes and Alkenes Using Iron-Catalyzed Cross-Coupling and Organometallic Addition Reactions." 京都大学 (Kyoto University), 2015. http://hdl.handle.net/2433/200444.
Lehr, Konrad [Verfasser], Alois [Akademischer Betreuer] Fürstner, and Norbert [Gutachter] Krause. "Entwicklung einer alkylierenden Eliminierung zur Synthese interner Alkine und deren Anwendung in der Totalsynthese von Muscenon und Tulearin C / Konrad Lehr. Betreuer: Alois Fürstner. Gutachter: Norbert Krause." Dortmund : Universitätsbibliothek Dortmund, 2014. http://d-nb.info/110494720X/34.
Shoai, Shiva. "Regioselective rhodium-catalyzed alkyne hydrothiolation with alkane thiols : substrate scope and mechanistic investigations." Thesis, University of British Columbia, 2010. http://hdl.handle.net/2429/27028.
Fröhling, Bettina. "Reaktionen elektrophiler und nucleophiler Schwefeldonoren mit cyclischen Alkenen und Alkinen." [S.l. : s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=964453169.
Greenhalgh, Mark David. "Iron-catalysed hydrofunctionalisation of alkenes and alkynes." Thesis, University of Edinburgh, 2015. http://hdl.handle.net/1842/17624.
Back, Stephan. "Mehrkernige Organometallverbindungen - Synthese, Reaktionsverhalten und elektronische Eigenschaften." Doctoral thesis, Universitätsbibliothek Chemnitz, 2000. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-200000251.
Hunt, Ashley D. "Intramolecular Cope-type Hydroamination of Alkenes and Alkynes Using Hydrazides." Thèse, Université d'Ottawa / University of Ottawa, 2011. http://hdl.handle.net/10393/19881.
Mahelová, Zora. "Charakterizace chemického složení dehtu po zplyňování biomasy." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2016. http://www.nusl.cz/ntk/nusl-240964.
Hoenigman, Rebecca Lee. "Theoretical and experimental investigations of diradicals, pyramidalized alkenes, and bent alkynes /." Thesis, Connect to this title online; UW restricted, 2002. http://hdl.handle.net/1773/8580.
Pimm, Austen David. "The application of #alpha#-metallated heterosubstituted alkenes to trisubstituted alkene synthesis." Thesis, University of Southampton, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.332548.
Sorigue, Damien. "Biosynthèse d'hydrocarbures dérivés des acides gras chez les microalgues." Thesis, Aix-Marseille, 2016. http://www.theses.fr/2016AIXM4084.
Alkanes and alkenes are important in industry. Alkanes and alkenes are synthesized from fatty acids by a variety of organisms, such as plants and insects. However, the presence in microalgae of enzymes converting fatty acids into hydrocarbons has been poorly studied. The aim of this work was to investigate the presence of alkanes and alkenes in various microalgae models, and try to identify the enzymes responsible for the synthesis of these compounds.We have first demonstrated the presence of linear hydrocarbons C15-C17 in microalgae Chlorella and Chlamydomonas. Then we have shown that the main hydrocarbon formed in Chlorella and Chlamydomonas was derived from cis-vaccenic acid and was synthesized only in the presence of light. Absence of homologues of genes coding for known alkane/alkene biosynthetic enzymes in the genome of Chlorella and Chlamydomonas indicate the presence of an unknown pathway. Enzymatic purification and proteomic analysis allowed to identify a candidate enzyme which, expressed in E. coli lead to the formation of hydrocarbons with variable chain lengths, thus demonstrating that it was really an synthase alkane. Characterization showed that the enzyme was a photoenzyme, which used blue light to catalyse the decarboxylation of fatty acid to an alka(e)ne. The three-dimensional structure of this enzyme revealed a hydrophobic tunnel containing the fatty acid and the FAD cofactor
Guo, Zijian. "Developing unstrained alkenes and alkynes for bioorthogonal chemistry." Thesis, University of Cambridge, 2019. https://www.repository.cam.ac.uk/handle/1810/289423.
Yip, Wing-ping, and 葉永平. "Alkane C-H bond oxidations and alkene dihydroxylations by oxorutheniumcomplexes of chelating tertiary amine ligands." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B31246254.
Hobbs, Paul Michael. "Computational sorption studies of alkanes and alkenes in zeolites." Thesis, University of Reading, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.320085.
Frosch, Wolfgang. "Synthese und Reaktionsverhalten Bis(alkinyl)-Metallocen-stabilisierter monomerer Organo-Kupfer(I)-Verbindungen." Doctoral thesis, Universitätsbibliothek Chemnitz, 2002. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-200200868.
Peter, Sebastian [Verfasser], Martin [Akademischer Betreuer] Hofrichter, John T. [Akademischer Betreuer] Groves, and Katrin [Akademischer Betreuer] Scheibner. "Oxyfunctionalization of alkanes, alkenes and alkynes by unspecific peroxygenase (EC 1.11.2.1) / Sebastian Peter. Gutachter: Martin Hofrichter ; John T. Groves ; Katrin Scheibner. Betreuer: Martin Hofrichter." Dresden : Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2013. http://d-nb.info/1068152370/34.
Wagener, Alex [Verfasser], and Stefan [Akademischer Betreuer] Ernst. "Adsorptive Trennung von Gemischen kurzkettiger Alkane und Alkene an nanostrukturierten porösen Adsorbentien / Alex Wagener. Betreuer: Stefan Ernst." Kaiserslautern : Universitätsbibliothek Kaiserslautern, 2012. http://d-nb.info/1021529036/34.
Chan, Wing-kei. "Oxidation of alkenes and alkynes catalyzed by a cyclodextrin-modified ketoester and metalloporphyrins." Click to view the E-thesis via HKUTO, 2005. http://sunzi.lib.hku.hk/hkuto/record/B36709591.
Kluwer, Alexander Marco. "Palladium-catalyzed stereoselective hydrogenation of alkynes to (Z)-alkenes in common solvents and supercritical CO2." [S.l. : Amsterdam : s.n.] ; Universiteit van Amsterdam [Host], 2004. http://dare.uva.nl/document/75435.
Zhang, Yaming. "Electron spin resonance studies of organic radical cations : theoretical and experimental approach." Thesis, Liverpool John Moores University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.313090.
Garba, Mustapha Danlami. "Valorisation of alkanes and alkynes by transhydrogenation in petrochemical processes." Thesis, University of Glasgow, 2017. http://theses.gla.ac.uk/8719/.
Janson, Pär. "Oxidative Trifluoromethylation and other Functionalization Reactions of Alkenes and Alkynes." Doctoral thesis, Stockholms universitet, Institutionen för organisk kemi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-103064.
At the time of the doctoral defense, the following paper was unpublished and had a status as follows: Paper 4: Submitted.
Okada, Takumi. "Studies on Ruthenium Complex-Catalyzed Functionalization of Alkenes and Alkynes." 京都大学 (Kyoto University), 2002. http://hdl.handle.net/2433/149811.
ZHENG, TAO. "MOLECULAR SIMULATION OF DIFFUSION AND SORPTION OF ALKANES AND ALKANE MIXTURES IN POLY[1-(TRIMETHYLSILYL)-1-PROPYNE]." University of Cincinnati / OhioLINK, 2000. http://rave.ohiolink.edu/etdc/view?acc_num=ucin973701057.
Rode, Katharina. "Studies Toward Selenium-pi-Acid Catalyzed Oxidative Functionalizations of Olefinic and Acetylenic Multiple Bonds." Doctoral thesis, Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2020. http://hdl.handle.net/21.11130/00-1735-0000-0005-1491-0.
Peters, Dietmund. "Homoaromatische Nickel(0)-Alken- und Alkin-Komplexe computergestützte Optimierung, Synthese und Eigenschaften /." [S.l.] : [s.n.], 2005. http://e-diss.uni-kiel.de/diss_1684/d1684.pdf.
Kleinschmidt, Olaf. "Photokatalytische Oxidation von Alkenen und Alkanen mit Sauerstoff an belichtetem Titandioxid." [S.l. : s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=962781142.
Fosu, Stacy C. "Functionalization of Arenes, Amines, Alkenes, and Alkynes Mediated by Radical Pathways." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1555514456659022.
Elser, Iris [Verfasser], and Michael R. [Akademischer Betreuer] Buchmeiser. "(Pre-)ionic and/or chiral alkene and alkyne metathesis catalysts of group 6 / Iris Elser ; Betreuer: Michael R. Buchmeiser." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2018. http://d-nb.info/1183678274/34.