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Dissertations / Theses on the topic 'Oxirana'

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Published: 4 June 2021

Last updated: 1 February 2022

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1

Silva, Francielle Rodrigues da. "Reações de abertura de oxiranas promovidas por organocalcogenolatos de zinco." Universidade Federal de Goiás, 2017. http://repositorio.bc.ufg.br/tede/handle/tede/8739.

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Submitted by Luciana Ferreira (lucgeral@gmail.com) on 2018-07-27T14:53:49Z No. of bitstreams: 2 Dissertação - Francielle Rodrigues da Silva - 2017.pdf: 2456520 bytes, checksum: 7c0ac67504c2ea35b6ad87c241e42e6d (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2018-07-27T14:54:51Z (GMT) No. of bitstreams: 2 Dissertação - Francielle Rodrigues da Silva - 2017.pdf: 2456520 bytes, checksum: 7c0ac67504c2ea35b6ad87c241e42e6d (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (

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2

Silva, Jefferson José Soares da. "Estudo teórico de complexos de hidrogênio heterocíclicos com enfoque na determinação dos mecanismos de reação." Universidade Federal da Paraíba, 2006. http://tede.biblioteca.ufpb.br:8080/handle/tede/7180.

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Made available in DSpace on 2015-05-14T13:21:50Z (GMT). No. of bitstreams: 1 arquivototal.pdf: 2213786 bytes, checksum: 0cc6e2b3683929f526b695daf59e4b4a (MD5) Previous issue date: 2006-10-23<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES<br>In the present work the molecular properties of heterocyclic hydrogen complexes: oxirane (C2H4O), methyloxirane (H3C-C2H3O) and hydroxi-oxirane (HO-C2H3O), as well as the respective ring open reaction by fluoridric acid has been investigated by using quantum chemistry methods. In this way, molecular properties of hydrogen comple

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3

Patterson, Christopher William. "Radical fragmentation of oxiranes." Thesis, University of Nottingham, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329877.

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4

Woydowski, Karsten. "Optisch aktive Heterocyclen durch Ringtransformation von Oxiran-2-Carbonsäurederivaten." [S.l. : s.n.], 1999. http://deposit.ddb.de/cgi-bin/dokserv?idn=956618073.

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5

Woydowski, Karsten. "Optisch aktive Heterocyclen durch Ringtransformation von Oxiran-2-carbonsäurederivaten." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 1999. http://dx.doi.org/10.18452/14344.

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Heterocyclen mit einer a-Hydroxycarbonyl-Einheit wie 3-Hydroxy-[1,5]-benzothiazepin-4-one oder 3-Hydroxychroman-4-one sind von Interesse, da sie Bestandteil von Pharmazeutika (z. B. Diltiazem®) oder Naturstoffen (z.B. die Flavonoide) sind. Ringtransformationen von optisch aktiven Glycidaten mit Binucleophilen stellen eine nützliche Synthesemethode zur Darstellung solcher Produkte dar. In Abhängigkeit von der Position des Angriffes des Nucleophiles am Oxiranring (a- oder b-Angriff) werden zwei Produkttypen mit verschiedenen Ringgrößen gebildet. Der Ablauf der Reaktion hängt vom Binucleophil

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6

Amri, Hilmi. "Polymérisation du furyl-2-oxiranne." Grenoble INPG, 1990. http://www.theses.fr/1990INPG0095.

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Ce travail concerne l'etude de la polymerisation du furyl-2-oxiranne (fo); il s'agit d'un monomere issu de la biomasse vegetale. Une etude detaillee, utilisant des reactions modeles, a permis d'etablir les mecanismes d'ouverture du cycle oxiranne par differents amorceurs (tbuok, meona, (ipro)#3al, koh, naoh). La polymerisation par tbuok a ete etudiee sous ses aspects cinetiques et mecanistiques. Des polymeres de masse allant de quelques centaines a 10000 ont ete obtenus. Des reactions de terminaison, mettant en jeu l'hydrogene du cycle oxiranne, ont ete identifiees et etudiees. D'autres amorce

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7

Corser, David Alan. "Novel enzyme- and free radical-mediated reactions of oxirane derivatives." Thesis, Loughborough University, 1993. https://dspace.lboro.ac.uk/2134/27040.

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The thesis describes the use of various hydrolases in the preparation of enantiomerically enriched epoxyesters. Optically enriched n-butyl 4,5- epoxypentanoate was prepared with a 64% enantiomeric excess via the porcine pancreatic lipase-catalysed hydrolysis of the racemic ester. The hydrolase-catalysed hydrolysis of two prochiral epoxydiesters; meso 2,3-epoxybutan-1 A-diyl dibutanoate and 2,3-epoxy-2-butanoyloxymethylpropan-1-yl butanoate, were performed with several lipases, with the enantiomerically enriched epoxymonoesters being obtained in up to 80% and 65% enantiomeric excesses, respecti

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8

Leal, Fernanda Barbosa. "Síntese de monômeros siloxano-oxiranos para aplicação em Odontologia." Universidade Federal de Pelotas, 2012. http://repositorio.ufpel.edu.br/handle/ri/2281.

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Made available in DSpace on 2014-08-20T14:30:15Z (GMT). No. of bitstreams: 1 Dissertacao_Fernanda_Barbosa_Leal.pdf: 806160 bytes, checksum: 37717162c453100433c520a8c9d199ef (MD5) Previous issue date: 2012-12-19<br>The aim of this study was synthesize, characterize and photopolymerize an alternative monomers for use in dentistry. Three siloxane-oxirane monomers were synthesized and the products conversion was followed by Fourier-transform infrared spectroscopy. The products obtained were characterized by 1H and 13C NMR and evaluated for viscosity and refractive index. The polymerization was

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9

Rakotondramanana, Samuel. "Production de furyl-2 oxirane à partir du furfural conception d'une unité industrielle /." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb376091522.

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10

Rakotondramanana, Samuel. "Production de furyl-2 oxirane à partir du furfural : conception d'une unité industrielle." Toulouse, INPT, 1987. http://www.theses.fr/1987INPT034G.

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Le procede se fait par catalyse basique heterogene liquide-solide (hydroxyde de potassium et sel de trimethyl sulfonium halogene). Mise en place d'un modele cinetique et presentation d'un schema de principe de l'unite industrielle

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11

Evans, Paul. "The epoxy Ramberg BaÌˆcklund rearrangement (ERBR) and related studies". Thesis, University of York, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.265373.

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12

Zaidi, Naveed Ahmed. "Ring opening/cyclisation in oxiranyl carbinyl free radicals." Thesis, Loughborough University, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.303179.

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13

Takizawa, Eiji. "Oxiranyl and Aziridinyl Anion Methodologies Using Flow Microreactors." 京都大学 (Kyoto University), 2011. http://hdl.handle.net/2433/142249.

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14

Uhlemann, Jens. "Optimisation et conduite automatique d'un réacteur discontinu-application à la synthèse du 2-furyl oxirane." Toulouse, INPT, 1992. http://www.theses.fr/1992INPT070G.

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Ce travail s'inscrit dans le cadre general de la conduite optimale des reacteurs de synthese de la chimie fine, a l'aide d'une approche conjuguant optimisation et automatisation. La demarche est appliquee a l'exemple de la synthese du 2-furyl oxirane. Le texte est divise en 4 parties et 13 chapitres. La premiere partie bibliographique situe le contexte general des procedes discontinus de la chimie fine. Les chapitres abordent successivement les problemes generaux associes a la conduite des reacteurs discontinus, outil principal de la transformation de la matiere en chimie fine. La deuxieme par

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15

Krishnamurthy, Venkatanarayanan. "The oxiranyl carbinyl radical rearrangement synthetic applications and kinetic studies /." The Ohio State University, 1995. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487864485228417.

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16

Bisol, Tula Beck. "Preparação e estudo da reatividade de oxirano e aziridino acetatos visando a síntese de y-lactamas funcionalizadas." reponame:Repositório Institucional da UFSC, 2012. http://repositorio.ufsc.br/xmlui/handle/123456789/95900.

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Tese (doutorado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas, Programa de Pós-graduação em Química, Florianópolis, 2011<br>Made available in DSpace on 2012-10-26T06:58:03Z (GMT). No. of bitstreams: 1 290257.pdf: 3957996 bytes, checksum: 414ed38650f5e07f28471b7990743d84 (MD5)<br>Desenvolveu-se um método simples e eficiente para a síntese diastereodivergente de .- lactamas ß,.-difuncionalizadas com configuração anti ou sin a partir de oxirano e aziridino acetatos. A etapa inicial envolveu a preparação de anti .-azido-ß-hidróxi ésteres pela azidólise de alqu

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17

Woydowski, Karsten [Verfasser], G. [Gutachter] Szeimies, and Jürgen [Gutachter] Liebscher. "Optisch aktive Heterocyclen durch Ringtransformation von Oxiran-2-carbonsäurederivaten / Karsten Woydowski ; Gutachter: G. Szeimies, Jürgen Liebscher." Berlin : Humboldt-Universität zu Berlin, 1999. http://d-nb.info/1207660469/34.

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18

Reynolds, Nigel J. "Generation of non-stabilised oxiranyl anions and their reactions with electrophiles." Thesis, University of Oxford, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.409766.

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19

Ardakani, Adel. "A new system for catalytic asymmetric epoxidation." Thesis, Loughborough University, 2002. https://dspace.lboro.ac.uk/2134/33590.

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This thesis discusses the field of asymmetric synthesis of oxiranes. An introduction highlighting the most successful methods for the synthesis of chiral epoxides including the latest advances in these areas, with particular attention paid to the organocatalytic techniques is presented in chapter one. The second chapter begins by summarizing the group's previous efforts in the initial stage of this project and sets the motif for this work. These include: the synthesis of enantiopure dihyroisoquinolinium salts with a chiral residue attached to the exocyclic carbon-nitrogen bond as catalysts for

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20

Guo, Boying. "New Ring Expansion and Ring Opening Reactions of Vinyl Oxetanes and Vinyl Oxiranes." Diss., The University of Arizona, 2014. http://hdl.handle.net/10150/315543.

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Three new synthetic methods employing vinyl oxetanes as substrates are presented. In Chapter 2, a new catalytic vinyl oxetane ring expansion is described. Origins, design, reaction, and optimizations are discussed. A novel asymmetric synthesis of 3,6-dihydro-2H-pyrans using chiral counterion catalysis is presented as part of these studies. In Chapter 3, the Z-selective ring opening of vinyl oxetanes using dialkyl dithiophosphate nucleophiles is described from initial discovery, through optimizations to the application towards the synthesis of thiopyrans. These insights were then utilized to de

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21

Soutif, Jean-Claude. "Etude de l'addition des acides carboxyliques sur les structures oxiranne application aux polymères époxydes /." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb376100446.

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22

Soutif, Jean-Claude. "Etude de l'addition des acides carboxyliques sur les structures oxiranne : application aux polymeres epoxydes." Le Mans, 1987. http://www.theses.fr/1987LEMA1010.

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La modification chimique au deuxieme degre de polymeres epoxydes a ete etudiee pour developper une methode de fixation de principes actifs (medicaments, colorants, complexants) comportant des fonctions acides, sur des supports macromoleculaires. Le catalyseur est un sel de tetramethylammonium de l'acide a fixer. Epoxydation de polyisoprene et polybutadiene

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23

Girard, Yvan. "Etude théorique des réactions de l'oxygène atomique sur l'acétylène et ses dérivés fluorés." Paris 6, 2004. http://www.theses.fr/2004PA066136.

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24

GUIGNE, PHILIPPE. "Regioselectivite de la reaction de nucleophiles ambidents sulfures avec des electrophiles (accepteurs de michael, oxiranes)." Caen, 1995. http://www.theses.fr/1995CAEN2045.

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La reaction de l'enethiolate lithie du dithioacetate de methyle avec des accepteurs de michael est regioselective. Elle conduit a: - une addition-1,4 pour les esters, cetones ethyleniques et un vinylphosphonate. Avec les esters ethyleniques un bon rendement est obtenu lorsque l'accepteur ou l'enolate resultant est stabilise. Avec une cetone diethylenique, un resultat interessant de double addition-1,4 avec cyclisation, a ete observe. Enfin un premier exemple de phosphonate comportant un groupement thiocarbonyle en 4 a ete obtenu de facon quantitative avec le vinylphosphonate ; ces resultats co

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25

Algamaiah, Hamad. "The effect of aging methods on the fracture toughness and physical stability of an oxirane/acrylate, ormocer, and bis-gma based resin composites." Thesis, University of Iowa, 2018. https://ir.uiowa.edu/etd/3238.

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Objective: To measure the fracture toughness, surface area and volume of a conventional Bis-GMA based resin composite (Filtek Supreme), experimental oxirane/acrylate based resin composite (OASys), and ormocer-based resin composite (Admira) at baseline (control) and after a 15-day exposure to a Streptococcus mutans based biofilm or 30 days storage in water. Methods. A 25 x 5 x 2.8 mm stainless-steel mold with 2.5 mm single edge notch at the center was used, following ASTM standards [E399-90], to fabricate 135 specimens (n=15) and distributed into nine groups based on composite material and agin

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26

Ngom, Malick. "Spectroscopie infrarouge à haute résolution de molécules d'intérêt pour les atmosphères planétaires et milieu interstellaire : Aziridine (C₂H₄NH) et Oxirane (C₂H₄O)." Paris 7, 2013. http://www.theses.fr/2013PA077233.

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Les molécules d'aziridine, C₂H₄NH et d'oxirane, C₂H₄0, sont des espèces d'intérêt astrophysique qui pourraient aussi être détectées dans l'atmosphère de Titan. La détection et la quantification de ces molécules dans les atmosphères planétaires nécessitent des études au laboratoire de leurs spectres. En conséquence, ces molécules ont fait l'objet de nombreuses études détaillées en micro-ondes et à basse et moyenne résolution er infrarouge Cependant, très peu d'études concernaient leurs spectres infrarouges à haute résolution. Nous avon donc enregistré des spectres infrarouges à haute résolution

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27

Flaherty, Terrence Michael. "1. Synthesis of C-glycoside sulfones via oxirane-thirane exchange 2. Preparation of sialic acid derivatives amenable to solid-phase synthesis 3. Conformational analysis of complex polysaccharides." Diss., The University of Arizona, 1997. http://hdl.handle.net/10150/282328.

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As part of a program directed toward the synthesis of novel glycosyl transferase inhibitors possessing a sugar-CH₂-SO₂-CH₂-SO₂-CH₂-nucleoside structure, β-C-glycoside sulfones have been prepared with high stereoselectivity. Both glucose and fucose derivatives were prepared. Sulfur incorporation was achieved by free radical addition of thiolacetic acid to exocyclic glycals. As part of a program directed toward the preparation of amide-linked sialic acid oligomers, a strategy was developed for the synthesis of sialic acid derivatives possessing either a free amine or a free acid functionality. S

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28

Santamaria, Gámez Antonio. "Formació de sistemes heterocíclics. Part 1: Per obertura i posterior SNAr intramolecular de 2-(2'-fluoroaril)-2-(1-azolilmetil)oxirans. Part 2: Per metàtesi de diens i enins." Doctoral thesis, Universitat Autònoma de Barcelona, 2002. http://hdl.handle.net/10803/3135.

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Els compostos orgànics heterocíclics tenen una gran importància dins de la química gràcies a les seves propietats ja que molts d'ells presenten activitat biológica. En aquesta tesi doctoral s'ha investigat mètodes de síntesi de compostos heterocíclics usant diverses aproximacions sintètiques.<br/>Un dels mètodes de síntesi consisteix en la formació de benzo[b]furans mitjançant una reacció de substitució nucleòfila aromàtica d'un àtom de fluor per un anió alcòxid generat a partir de l'obertura d'un epòxid amb una base forta no nucleòfila com el tert-butòxid sòdic. <br/>Els oxirans de partida s'

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29

Raynaud, Jean. "Carbènes N-hétérocycliques comme activateurs "multi-tâches" des réactions de polymérisations par transfert de groupe des (meth)acryliques et par ouverture de cycle des oxiranes." Thesis, Bordeaux 1, 2010. http://www.theses.fr/2010BOR13995/document.

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L’utilisation de carbènes N-hétérocycliques (NHCs), en tant qu’activateurs organiques « multitâches », a permis la polymérisation de deux classes de monomères : les monomères vinyliques de type (méth)acrylique et les monomères cycliques de type époxyde. En particulier, la polymérisation par transfert de groupe (GTP) catalysée par les NHCs a été utilisée pour polymériser les monomères acryliques et méthacryliques, dans des solvants polaires comme apolaires, en présence d’un amorceur de type acétal de cétène silylé. Sur cette base des copolymères à blocs « tout-acrylique » ont été synthétisés. D

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30

Tortosa, Karine. "Synthèse de composés à base de néodyme pour la polymérisation de l'ε-caprolactone et des oxiranes en milieu homogène et hétérogène". Lyon 1, 1999. http://www.theses.fr/1999LYO10323.

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31

Delaite, Christelle. "Développement de systèmes catalytiques à base d'alcoolates d'aluminium ou de lanthanides supportés : étude de leur comportement dans la polymérisation des lactones et des oxiranes." Lyon 1, 1998. http://www.theses.fr/1998LYO10165.

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32

鄭一楓 and Yi-Feng Zheng. "A study of the synthesis and properties of some oxiranyl and thiirangllong chain fatty acid esters and the production of furanyl derivativesfrom the seed oil of biota orientalis." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1988. http://hub.hku.hk/bib/B31209063.

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33

Zheng, Yi-Feng. "A study of the synthesis and properties of some oxiranyl and thiirangl long chain fatty acid esters and the production of furanyl derivatives from the seed oil of biota orientalis /." [Hong Kong : University of Hong Kong], 1988. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12437153.

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34

Celante, Gizele. "Controle da regiosseletividade de abertura de 2,3-epóxi-éster empregando selenolatos metálicos visando a obtenção de seleno-α-hidroxi-éster." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/46/46136/tde-21062017-081349/.

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No presente trabalho foram realizados estudos de regiosseletividade das reações de abertura de 2,3-epoxipropanoato de etila (1) utilizando diferentes nucleófilos de selênio e algumas dessas reações foram desenvolvidas com a adição do ácido de Lewis trifluoreto de boro dietil éter (BF3·Et2O). A abertura desse oxirano ao utilizar os nucleófilos MeSeMgCl e MeSeLi-BF3·Et2O ocorreu seletivamente no Carbono C-3 formando o composto de interesse (3-metilseleno 2-hidroxipropanoato de etila), já ao utilizar MeSeLi (em ausência ácido de Lewis) a abertura procedeu-se seletivamente no carbono C-2

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35

Bejjani, Joseph. "Stabilité configurationnelle de carbénoi͏̈des alléniques et applications en synthèse asymétrique." Paris 6, 2003. http://www.theses.fr/2003PA066019.

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36

Jun, Chang-Lim. "Synthèse et caractérisation d'oligomères bifonctionnels racémiques et optiquement actifs dérivés de l'oxyde de propylène." Paris 6, 1986. http://www.theses.fr/1986PA066162.

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Étude bibliographique; synthèse de l'oxyde de propylène optiquement actif; oligomérisation de l'oxyde de propylène; caractérisation des oligomères par détermination de la masse moléculaire et de la fonctionnalité des oligoethers par IR, RMN du proton et du carbone 13; modification chimique de oligo(oxyde de propylène)s; étude des propriétés chirooptiques de oligoethers; étude par RMN du carbone 13 des oligomères de l'oxyde de propylène; étude par RMN du carbone 13 des polyoxyde de propylène préparés par le système tétraphenylporphyrine…

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37

Rof, Christine. "Fonctionnalisation de la cellulose en vue d'améliorer la souplesse de la toile-éponge régénérée issue du procédé viscose." Nancy 1, 1988. http://www.theses.fr/1988NAN10502.

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38

Charpentier, Langlois Patricia. "Transposition de N-tosyl oxirannes-méthanamines en N-tosyl aziridines-méthanols." Bordeaux 1, 1987. http://www.theses.fr/1987BOR10578.

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39

Pale, Patrick. "Synthese et reactivite d'epoxyalcools acetyleniques chiraux : application a la synthese de cyclopropanes et d'heterocycles fonctionnalises." Reims, 1988. http://www.theses.fr/1988REIMS012.

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40

Bernadet, Philippe. "Propriétés spectroscopiques de complexes formes entre un hydracide (HCl, HBr, HI)) et l'oxyde d'éthylène (EO) en matrice d'argon et d'azote : analyse du profil de la bande d'absorption HCl des complexes H(D)Cl:EO et H(D)Cl:dimethylether et étude." Paris 6, 1986. http://www.theses.fr/1986PA066355.

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41

Jachiet, Denis. "Reactivite des organocuprates et des organoaluminates associes a bf::(3) dans l'ouverture nucleophile des oxirannes : application a la synthese de pheromones." Paris 6, 1987. http://www.theses.fr/1987PA066438.

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42

Li, Tao-Hung, and 李道弘. "Photopolymerization of Ferroelectric Liquid Crystal Oxiranes." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/92203839162422313409.

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碩士<br>國立交通大學<br>應用化學系<br>87<br>The goal of this research is to synthesize oriented ferroelectric liquid crystal oxiranes which form a chiral smectic C phase at room temperature. Two series of ferroelectric liquid crystal oxiranes and their side chain liquid crystal polymer was synthesized. In order to study the effect of spacer on the mesogenic phases formed by both monomer and polymer, two different kinds of spacers are used. The first series of monomers contain 2 and 3 oxyethylene units as spacers while the second series of monomers contain 4 and 9 methylene units as spacers. In order to stu

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43

Woydowski, Karsten [Verfasser]. "Optisch aktive Heterocyclen durch Ringtransformation von Oxiran-2-Carbonsäurederivaten / von Karsten Woydowski." 1999. http://d-nb.info/956618073/34.

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44

Chen, Cheng-Yu, and 陳正育. "Study of synthesis and self-assembled structure of oxiran-2-ylmethyl 3,4,5-trialkoxybenzoate." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/43440005020766838616.

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碩士<br>國立高雄師範大學<br>化學系<br>100<br>A series of oxiran-2-ylmethyl 3,4,5-trialkoxybenzoate with different chain length n (n= 12, 14, 16 and 18) have been synthesized and characterized by 1H NMR, FT-IR and SEM. The results demonstrate that the oxiran-2-ylmethyl 3,4,5-trialkoxybenzoate can form fiber structures with hundreds nm diameter via self-assembly. The second part is the reaction of oxiran-2-ylmethyl 3,4,5-trialkoxybenzoate with 3,4,5-trialkoxybenzoic acid via ring opening reaction and a series of disotic liquid crystal were obtained. The effects on gel and liquid crystal properties with diffe

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Chen, Hsing-Ming, and 陳行明. "Microwave-assisted Conversion of Oxiranes to Thiiranes in Ammonium Thiocyanate Aqueous Solution." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/77006669504069186786.

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碩士<br>高雄醫學大學<br>藥學研究所碩士班<br>92<br>A new and highly efficient method for conversion of oxiranes to thiiranes was established. By the treatment of oxiranes with ammonium thiocyanate in aqueous media and irritating with microwave, thiiranes were obtained efficiently and smoothly in high yields , and in a short reaction time .

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Haiß, Peter [Verfasser]. "Die Oxiren-Beteiligung in der photochemischen Wolff-Umlagerung / vorgelegt von Peter Haiß." 2005. http://d-nb.info/975583190/34.

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Wilson, Stephanie Jo. "Coupling of CO_(2) and CS_(2) with Novel Oxiranes: Polycarbonate vs. Cyclic Carbonate Production." Thesis, 2013. http://hdl.handle.net/1969.1/151157.

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Polycarbonates are a type of engineering thermoplastic that have countless uses in modern society. Currently, the major industrial production of polycarbonates involves the polycondensation of a diol and phosgene or phosgene derivative. Though there are many advantages to this process, it creates large amounts of waste and requires dangerous chemicals in order to proceed. Over the past four decades, the coupling of CO_(2) and epoxides has grown into a viable, greener alternative for the production of select polycarbonates. The byproduct of this reaction, cyclic carbonates, also have use as

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Maciá, Ruiz Beatriz. "Litiación catalizada por un areno: doble litiación, apertura reductora de oxiranos y transposición de Wittig." Doctoral thesis, 2005. http://hdl.handle.net/10045/16455.

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Hövetborn, Thomas [Verfasser]. "Synthese, Charakterisierung und thermischer Abbau von Copolymeren aus THF und funktionalisierten Oxiranen / vorgelegt von Thomas Hövetborn." 2001. http://d-nb.info/965178617/34.

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Cordova, Lozano Felipe. "Photochemistry from Density-Functional Theory." Phd thesis, 2007. http://tel.archives-ouvertes.fr/tel-00346053.

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Les méthodes de la chimie quantique sont aujourd'hui des outils importants pour étudier la structure électronique des molécules et pour calculer les énergies totales associées. Les méthodes de la chimie quantique sont souvent utilisées pour interpréter toutes sortes d'expériences spectroscopiques. Ces méthodes servent également pour étudier les mécanismes chimiques des réactions chimiques. Un cas particulier est celui de la photochimie. Actuellement grâce à l'élaboration des méthodologies théoriques, l'analyse théorique de l'état fondamental et des états excités a évolué jusqu'au point qu'il f

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