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Tesis sobre el tema "Titanocenes"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 14 de febrero de 2022

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1

Shu, Ronghua 1962. "Some novel organosilane reactions catalyzed by titanocenes." Thesis, McGill University, 1998. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=35941.

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This thesis presents some novel organosilane reactions catalyzed by titanocenes.<br>Heterodehydrocoupling between silanes and phosphines has been accomplished with titanocenes, as catalysts. The reaction has the characteristics of high yield and high selectivity and can be carried out under mild conditions. Monophosphinosilanes and diphosphinosilanes can be selectively obtained from the reactions of secondary phosphines andsilanes. Primary phosphines react with primary silanes to produce 1,3,5-triphospha-2,4,6-trisilacyclohexanes. A two-catalytic-cycled mechanism is proposed with titanocene hy

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2

Shu, Ronghua. "Some novel organosilane reactions catalyzed by titanocenes." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape7/PQDD_0022/NQ50260.pdf.

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3

Beagley, Paul. "Ansa-titanocenes for enantioselective reduction of C=X bonds." Thesis, University of Sheffield, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.557602.

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4

Santos, Hugo Felix Lima dos. "Estudo te?rico QTAIM e DFT dos compostos de coordena??o: efeito quelato, titanocenos e liga??o qu?mica." Universidade Federal do Rio Grande do Norte, 2012. http://repositorio.ufrn.br:8080/jspui/handle/123456789/17689.

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Made available in DSpace on 2014-12-17T15:42:03Z (GMT). No. of bitstreams: 1 HugoFLS_DISSERT.pdf: 2820205 bytes, checksum: ad87619352b0e479d50e7f9093be5ec0 (MD5) Previous issue date: 2012-10-15<br>This work is a study of coordination compounds by quantum theory of atoms in molecules (QTAIM), based on the topological analysis of the electron density of molecular systems, both theoretically and experimentally obtained. The coordination chemistry topics which were studied are the chelate effect, bent titanocene and chemical bond in coordination complexes. The chelate effect was investigated acc

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5

Kater, Lisa Katharina [Verfasser]. "Neuartige metallhaltige Verbindungen als potentielle Zytostatika, insbesondere für die Behandlung der therapieresistenten akuten lymphoblastischen Leukämie im Kindesalter am Beispiel eines Titanocenes / Lisa Katharina Kater." Berlin : Medizinische Fakultät Charité - Universitätsmedizin Berlin, 2016. http://d-nb.info/1102197041/34.

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6

Kater, Lisa [Verfasser]. "Neuartige metallhaltige Verbindungen als potentielle Zytostatika, insbesondere für die Behandlung der therapieresistenten akuten lymphoblastischen Leukämie im Kindesalter am Beispiel eines Titanocenes / Lisa Katharina Kater." Berlin : Medizinische Fakultät Charité - Universitätsmedizin Berlin, 2016. http://d-nb.info/1102197041/34.

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7

Xin, Shixuan. "Some catalytic and stoichiometric reactions of titanocene and chiral ansa-titanocene derivatives with silanes and siloxanes." Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=39898.

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Several types of catalytic and stoichiometric reactions of titanocenes and chiral ansa-titanocenes were studied.<br>Dimethyltitanocene (DMT) and rac- (EBTHI) TiMe$ sb2$ (EBTHI = ethylene-1,2-bis (4,5,6,7-tetrahydro-1-indenyl)) are effective catalyst precursors for hydrosilation of a variety of ketones when using in conjunction with secondary silanes. A catalyst generated by in situ reaction of enantiomerically pure S- (EBTHI) TiX$ sb2$ (X = Cl, 1/2(S-1,1$ sp prime$-binaphthyl-2,2$ sp prime$-diolate)) with MeLi catalyzes hydrosilation of dialkyl ketones to give, after hydrolysis, the enantioenr

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8

Boyles, John Ronald. "Antiproliferative activity of some polar substituted titanocene dichlorides." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq22278.pdf.

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9

Brink, Susanna. "Structure-activity relationships of titanocene complexes with antitumor properties." Pretoria : [s.n.], 2003. http://upetd.up.ac.za/thesis/available/etd-09052005-101713/.

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10

Cini, Melchior. "Synthesis and biological evaluation of enantiopure substituted titanocene complexes." Thesis, University of Nottingham, 2015. http://eprints.nottingham.ac.uk/30485/.

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Tolerated by normal tissues, implementation of anti-cancer therapies based on titanium compounds is limited by low efficacy/selectivity, lack of understanding of their mode(s) of action and access to the most active chiral variants. This thesis reports the synthesis, characterization and biological evaluation of a novel class of chiral substituted titanocenes from novel chiral cyclopentadienyl ligands, themselves accessible from substituted pentafulvenes. After an introductory chapter, the second chapter describes the synthesis and biological evaluation of substituted (rac/meso)-mixtures of Ti

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11

Bell, Jane Louise. "The synthesis and applications of chiral, group IV metallocenes." Thesis, University of Southampton, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336625.

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12

Kablaoui, Natasha M. (Natasha Miriam). "New synthetic methodologies utilizing reductive cyclizations catalyzed or mediated by titanocene complexes." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/42648.

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13

Plecnik, Christine Emily. "Synthesis, Characterization, and Reactivity of Titanocene Cyclic Organohydroborates; Synthesis, Spectroscopic Studies, and Structures of Lanthanide(II)-Cobalt Carbonyl Complexes." The Ohio State University, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=osu1047408488.

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14

Fartel, Beata. "Titanocene and zirconocene complexes for the carbon-oxygen bond cleavage of lignin model compounds." Thesis, University of British Columbia, 2014. http://hdl.handle.net/2429/46434.

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The development of well-defined transition metal catalysts for the selective cleavage of carbon-oxygen bonds is a critical challenge for the conversion of lignin to useful chemicals. Oxophilic titanocene complexes are particularly attractive for this application. They have been thoroughly studied in a variety of oxidation states and their reactivity can be dramatically altered by simple modifications of the ancillary ligands. Additionally, titanium is earth-abundant, inexpensive, and relatively non-toxic. Titanocene-mediated carbon-oxygen bond cleavage of the α-aryloxy ketones 2-phenoxy-1-phe

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15

Aazam, Elham Shafik. "A study of the reactivity of the titanocene [Ti(#eta#'5-Cp's)â†2]." Thesis, University of Sussex, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.391832.

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16

Mokdsi, George. "Antitumour Metallocenes." University of Sydney. Chemistry, 2000. http://hdl.handle.net/2123/794.

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This thesis reports a study of the chemical stability and coordination chemistry of several antitumour metallocenes Cp2MCl2 (Cp = h5-C5H5; M = Ti 1, V 2, Nb 3, Mo 4), as well as derivatives of Cp2TiCl2 1, with nucleic acids, nucleic acid constituents and proteins. These studies were carried out in order to identify the biologically active species and more fully understand the molecular level mechanism of action of the antitumour metallocenes, in particular Cp2TiCl2 1, which is currently undergoing phase II clinical trials. The interactions of Cp2MoCl2 4 with four oligonucleotides were stud

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17

Svačina, Zdeněk. "Příprava syndiotaktického polystyrenu pomocí monocyklopentadienylových komplexů titanu." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2008. http://www.nusl.cz/ntk/nusl-216371.

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A series of four novel halosilylsubstitued monocyclopentadienyl titanium complexes; [Si(CH3)2FCp]TiCl3 – FSiTTC, [Si(CH3)F2Cp]TiCl3 F2SiTTC, [Si(CH3)Cl2Cp]TiCl3 - Cl2SiTTC, [Si(CH3)2ClCp]TiCl3 - ClSiTTC was tested as catalytic precursors for polymerization of styrene in toluene. The maximum polymerization activity was achieved after polymerization period of 20 minutes. Activity decreased in order FSiTTC/MAO > F2SiTTC/MAO > Cl2SiTTC/MAO > ClSiTTC /MAO. Prepared polystyrenes were characterized using 13C NMR spectroscopy and DSC analysis. Syndiotacticity index of obtained PSs was determined by m

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18

Valadares, Marize Campos. "Avaliação de alguns aspectos da resposta imune tipo celular em animais portadores do tumor ascitico de Ehrlich e tratados com titanocenos." [s.n.], 2002. http://repositorio.unicamp.br/jspui/handle/REPOSIP/311294.

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Orientador : Mary Luci de Souza Queiroz<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Ciencias Medicas<br>Made available in DSpace on 2018-08-01T16:36:52Z (GMT). No. of bitstreams: 1 Valadares_MarizeCampos_D.pdf: 1218609 bytes, checksum: 217724b78283c81f36fd717fc91a9735 (MD5) Previous issue date: 2002<br>Resumo: Neste trabalho, dando prosseguimento a estudos prévios realizados em nosso laboratório investigamos os efeitos do composto diciclopentadienildiclorotitânio IV, DDCT, (15 mg/kg/dia/ dois dias) sobre a capacidade funcional das células ¿natural killer¿ (NK) e a p

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19

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.

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Bibliographische Beschreibung und Referat Frosch, W. Synthese und Reaktionsverhalten Bis(alkinyl)-Metallocen-stabilisierter monomerer Organo-Kupfer(I)-Verbindungen Technische Universität Chemnitz, Fakultät für Naturwissenschaften, Dissertation, 2001, 103 Seiten. In der vorliegenden Arbeit werden Synthese und Reaktionsverhalten von hetero-metallischen Ti(IV)-Cu(I)-Komplexen der Art {[Ti](CCR1)2}CuX {[Ti] = (h5-C5H4SiMe3)2Ti; R1 = einfach gebundener organischer Rest; X = anorganischer, organischer oder metallorganischer Rest} beschrieben. Diese Verbindungen können zwei bis fünf Übergangsme

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20

Meyer, Andreas [Verfasser]. "EPR-Based Distance Measurements on Metal Nitroxide Model Complexes as Well as EPR Spectroscopic Characterization of [Si2]-Radicals and Titanocene Complexes / Andreas Meyer." Bonn : Universitäts- und Landesbibliothek Bonn, 2017. http://d-nb.info/1132711258/34.

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21

Carter, Charles Ashton Garett. "Titanacyclobutanes from radical alkylation of substituted pi-allyl titanocen(III) complexes and conversion to 4- and 5-membered organic ring systems." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ29024.pdf.

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22

Trommenschlager, Audrey. "Conception de complexes d'or et de titane pour l'imagerie moléculaire, la thérapie et la théranostique." Thesis, Bourgogne Franche-Comté, 2019. http://www.theses.fr/2019UBFCK004.

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En vue de contourner les phénomènes de chimiorésistance et l’apparition d’effets secondaires sévères engendrés par les traitements à base de platine, nous avons développé des agents thérapeutiques à base d’autre métaux.Mon premier projet repose sur l’élaboration de complexes d’or(I) traçables possédant des propriétés anticancéreuses et anti-inflammatoires. Afin d’apporter des informations préliminaires sur leur mécanisme d’action, deux sondes imageantes ont été introduites : soit une coumarine, soit un BODIPY. Ainsi, deux séries de complexes d’or(I) ont été synthétisées. Trois d’entre eux prés

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23

Alansawi, Deeb. "Rigid-Rod Structured Homobimetallic Complexes." Doctoral thesis, Universitätsbibliothek Chemnitz, 2005. http://nbn-resolving.de/urn:nbn:de:swb:ch1-200500344.

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The synthesis and reaction chemistry of trans-(PPh3)2Pd(C6H4-4-I)(X) (X = I, OTf) is discussed. Treatment of trans- (PPh3)2Pd(C6H4- 4-I)(OTf) with bidentate Lewis-bases (N)N), such as pz, bipy, C5H4N-4-CN, (C6H4-4-CN)2 or C6H4-1,4-CN produces, depending on N)N, mono- or bimetallic species of type [trans- (PPh3)2Pd(C6H4-4-I)(N)N)]+ or [trans-(Ph3P)2(C6H4- 4-I)Pd N)N Pd- (PPh3)2(C6H4-4-I)]2+. These new complexes rearrange in the solution to give [trans-[(Ph3P)2Pd(C6H4-4-PPh3)(N)N)]2+ (N)N = C4H4N2, C5H4N-4-CN, NaC-4-C5H4N) and [trans-[(Ph3P)2(C6H4-4-PPh3)- Pd N)N Pd(PPh3)2(C6H4-4-PPh3)]4+ (N)N =

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24

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.

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In der vorliegenden Arbeit werden bi- und oligometallische Komplexe, die auf Bis(alkinyl)titanocen-Bausteinen (Metallorganische pi-Pinzetten) basieren, beschrieben. Dabei stehen Synthesestrategien und Untersuchungen zum Reaktionsverhalten sowie elektrochemische Eigenschaften der mehrkernigen Komplexe im Vordergrund. Bimetallische Ti-M-Systeme (M = Cu, Ag) können als Vorstufen zu höhernuklearen Spezies dienen. Die oligometallischen pi-Pinzetten-Komplexe sind entweder durch organische Ligandsysteme oder über anorganische Bausteine wie Halogenide oder Pseudohalogenide miteinander verknüpft. Über

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25

Liu, Huaqin. "Etude de l'oligomérisation des alpha-oléfines amorcées par des systèmes bimétalliques à base de dérivés d'un métal de transition (groupe IV B) et de composés organoaluminiques." Paris 6, 1986. http://www.theses.fr/1986PA066087.

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26

Clawson, Leigh Ellen. "Studies on the Reactivity of Titanocene Alkylidenes and Titanocene Alkyl Chlorides." Thesis, 1988. https://thesis.library.caltech.edu/7406/1/Clawson_le_1988.pdf.

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<p>The scope and limitations of the reaction of titanocene methylidene with ketones were investigated. Easily enolizable ketones are methylenated quantitatively and isolated in high yield. This reagent also demonstrates chemoselectivity for ketones over esters and regioselectivity for less hindered ketones. Enolates are produced by proton transfer to the methylidene from very sterically (but not particularly acidic) ketones.</p> <p>A simple one-pot method for the production of a geminal dimethylated center from a ketone and two equivalents of titanocene methylidene has been developed. This

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27

Brink, Susanna. "Structure-activity relationship of titanocene complexes with antitumor properties." Thesis, 2003. http://hdl.handle.net/2263/27746.

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28

Potter, Gregory David. "A novel series of titanocene dichloride derivatives: synthesis, characterization and assessment of their cytotoxic properties." Thesis, 2008. http://hdl.handle.net/1974/1208.

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Although cis-PtCl2(NH3)2 (cisplatin) has been widely used as a chemotherapeutic agent, its use can be accompanied by toxic side effects and the development of drug resistance. Consequently, much research has been focused on the discovery of novel transition metal compounds which elicit elevated cytotoxicities coupled with reduced toxic side effects and non-cross resistance. Recently, research in this lab has focused on preparing derivatives of titanocene dichloride (TDC), a highly active chemotherapeutic agent, with pendant alkylammonium groups on one or both rings. Earlier results have demons

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29

Park, Joon Won. "Reactivity of titanocene methylidene with metal halides, alkene sulfides, and alkene oxides." Thesis, 1989. https://thesis.library.caltech.edu/7849/8/Park-jw-1989.pdf.

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<p>Titanocene metallacyclobutanes show a wide variety of reactivites with organic and inorganic reagents. Their reactions include methylene transfer to organic carbonyls, formation of enolates, electron transfer from activated alkyl chlorides, olefin metathesis, ring opening polymerization. Recently, preparations of heterobinuclear µ-methylene complexes were reported. In this thesis, mechanistic, synthetic, and structural studies of the heterobinuclear µ-methylene complexes will be described. Also, the reaction of titanocene methylidene trimethylphosphine complex with alkene sulfide and styren

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30

Meinhart, James Douglas. "Synthesis and Reactivity of Titanocene Methylene Complexes and Bis(η⁵-Cyclopentadienyl) Titanacyclobutenes". Thesis, 1987. https://thesis.library.caltech.edu/11837/1/Meinhart_JD_1987.pdf.

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<p>Syntheses of several bis(η<sup>5</sup>-cyclopentadienyl) titanium methylene phosphine complexes are reported. The titanium methylene phosphine complexes are generated from themolysis of titanacyclobutanes in the presence of excess phosphine. Spectral data and reactivity are consistent with a methylene phosphine complex rather than an ylide complex.</p> <p>Bis(η<sup>5</sup>-cyclopentadienyl) titanacyclobutenes are readily synthesized by treatment of sources of "Cp<sub>2</sub>TiCH<sub>2</sub>" with disubstituted alkynes. A variety of stable titanacyclobutenes were synthesized containing ar

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31

Klawonn, Thorsten Harald [Verfasser]. "Niedermolekulare metallorganische Gelatoren Desoxyaminozucker-Carbenkomplexe und Cholesterol-Titanocene / vorgelegt von Thorsten Harald Klawonn." 2008. http://d-nb.info/991806476/34.

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32

Theilmann, Oliver [Verfasser]. "Bisazinverbrückte Titanocen(II)- und (III)komplexe / von Oliver Theilmann." 2009. http://d-nb.info/996766154/34.

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33

Stille, John Robert. "The Synthetic Versatility of Titanocene Methylidene Sources and Their Utility in the Total Synthesis of Capnellene." Thesis, 1986. https://thesis.library.caltech.edu/11859/2/Stille_JR_1986.pdf.

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<p>The development and application of a synthetically useful metallacycle are described. Using this metallacycle reagent to generate the reactive titanocene methylidene, the methylenation of dialkyl carbonates occurs, producing ketene ketals. The transformation of carbonates to ketene ketals varies dramatically with the O-alkyl substituents on the carbonate. Due to the sensitivity of titanocene methylidene toward steric interference, conversion is substantially higher for dimethyl carbonate than for diphenyl carbonate. Restricting the carbonates to the <i>s-trans</i>, <i>s-trans</i> conformati

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34

"Avaliação de alguns aspectos da resposta imune tipo celular em animais portadores do tumor ascitico de Ehrlich e tratados com titanocenos." Tese, Biblioteca Digital da Unicamp, 2002. http://libdigi.unicamp.br/document/?code=vtls000250729.

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35

Graham, Philip Brand. "Studies in metallocene chemistry: A cell for infrared spectroelectrochemistry with applications in titanocene chemistry, ferrocene-containing polyesters, substituent effects in cyclopentadienylrhodium compounds." 1990. https://scholarworks.umass.edu/dissertations/AAI9101637.

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Studies of the properties of metal cyclopentadienyl compounds were made by infra-red spectroelectrochemistry, electrochemistry, synthesis and $\sp{103}$Rh nuclear magnetic resonance spectrometry. A cell capable of simultaneously recording IR spectra of the region near the electrode surface during electrochemical experiments was developed, and characterized using ferricyanide. The absorbance-time response to potential step and potential sweep experiments was investigated and the experimentally determined response compared to a digital simulation of the response at different distances from the e

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36

Frade, Ana Sofia Barreto da Silva Cortez. "Comportamento químico e síntese de nitrilos na presença de monocloreto de titanoceno: suas aplicações na síntese de B-Lactamas." Master's thesis, 2012. http://hdl.handle.net/10451/9241.

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Tese de mestrado em Química, apresentada à Universidade de Lisboa, através da Faculdade de Ciências, 2012<br>O grupo de investigação onde este trabalho foi desenvolvido tem-se dedicado á síntese de β-lactamas potencialmente inibidoras da elastase leucocitária humana (HLE), usando a química radicalar do monocloreto de titanoceno. Assim, com o objetivo de identificar as estruturas cíclicas efetivas na formação dos radicais titanoimidoilo, levou-se a cabo reações com Cp2TiCl de diferentes monolactamas e compostos lineares com as funções nitrilo e carbonilo na sua estrutura de modo a identificar o

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37

Frosch, Wolfgang. "Synthese und Reaktionsverhalten Bis(alkinyl)-Metallocen-stabilisierter monomerer Organo-Kupfer(I)-Verbindungen." Doctoral thesis, 2001. https://monarch.qucosa.de/id/qucosa%3A17865.

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Bibliographische Beschreibung und Referat Frosch, W. Synthese und Reaktionsverhalten Bis(alkinyl)-Metallocen-stabilisierter monomerer Organo-Kupfer(I)-Verbindungen Technische Universität Chemnitz, Fakultät für Naturwissenschaften, Dissertation, 2001, 103 Seiten. In der vorliegenden Arbeit werden Synthese und Reaktionsverhalten von hetero-metallischen Ti(IV)-Cu(I)-Komplexen der Art {[Ti](CCR1)2}CuX {[Ti] = (h5-C5H4SiMe3)2Ti; R1 = einfach gebundener organischer Rest; X = anorganischer, organischer oder metallorganischer Rest} beschrieben. Diese Verbindungen können zwei bis fünf Übergangsme

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38

Yeung, Darien. "Automation of reaction monitoring." Thesis, 2019. http://hdl.handle.net/1828/10667.

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Automation plays an integral role in our daily lives. From transportation to agriculture, we rely on robots and programs to assist in accomplishing tasks. Chemistry is no except with the deployment of high throughput screening and the recent machine-led reaction discovery, there is increased interest to integrate artificial intelligence and robotics beyond medicinal and synthetic organic chemistry. The addition of automation to mechanistic studies can improve the method in which reactions are understood experimentally and fundamentally. Chapter 1 introduces the basics of reaction chemistry.

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