Relevant bibliographies by topics / Organometallic ; Thorium

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Academic literature on the topic 'Organometallic ; Thorium'

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Published: 4 June 2021
Last updated: 8 February 2022

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Journal articles on the topic "Organometallic ; Thorium"

1

Leigh, G. J. "Gmelin handbook of inorganic and organometallic chemistry, 8th edition, thorium, thorium carbides, supplement volume C6." Journal of Organometallic Chemistry 463, no. 1-2 (December 1993): C11. http://dx.doi.org/10.1016/0022-328x(93)83431-t.

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Pool, Jaime A., Brian L. Scott, and Jaqueline L. Kiplinger. "Carbon–nitrogen bond cleavage in pyridine ring systems mediated by organometallic thorium(iv) complexes." Chemical Communications, no. 20 (2005): 2591. http://dx.doi.org/10.1039/b502439k.

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Monreal, Marisa J., Lani A. Seaman, George S. Goff, Ryszard Michalczyk, David E. Morris, Brian L. Scott, and Jaqueline L. Kiplinger. "New Twists and Turns for Actinide Chemistry: Organometallic Infinite Coordination Polymers of Thorium Diazide." Angewandte Chemie 128, no. 11 (February 10, 2016): 3695–700. http://dx.doi.org/10.1002/ange.201510851.

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Monreal, Marisa J., Lani A. Seaman, George S. Goff, Ryszard Michalczyk, David E. Morris, Brian L. Scott, and Jaqueline L. Kiplinger. "New Twists and Turns for Actinide Chemistry: Organometallic Infinite Coordination Polymers of Thorium Diazide." Angewandte Chemie International Edition 55, no. 11 (February 10, 2016): 3631–36. http://dx.doi.org/10.1002/anie.201510851.

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Inman, Christopher J., and F. Geoffrey N. Cloke. "The experimental determination of Th(iv)/Th(iii) redox potentials in organometallic thorium complexes." Dalton Transactions 48, no. 29 (2019): 10782–84. http://dx.doi.org/10.1039/c9dt01553a.

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Ossola, F., G. Rossetto, P. Zanella, G. Paolucci, and R. D. Fischer. "Organometallic amides of uranium(IV) and thorium(IV) involving one, two, or three cyclopentadienyl ligands." Journal of Organometallic Chemistry 309, no. 1-2 (January 1986): 55–63. http://dx.doi.org/10.1016/s0022-328x(00)99573-1.

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Jantunen, Kimberly C., Raymond J. Batchelor, and Daniel B. Leznoff. "Synthesis, Characterization, and Organometallic Derivatives of Diamidosilyl Ether Thorium(IV) and Uranium(IV) Halide Complexes." Organometallics 23, no. 9 (April 2004): 2186–93. http://dx.doi.org/10.1021/om0343115.

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Leigh, G. J. "Gmelin Handbook of Inorganic and Organometallic Chemistry, 8th edition Th, Thorium, Supplement Volume D4, Chromatography, Chemistry in Nonaqueous Solutions." Journal of Organometallic Chemistry 452, no. 1-2 (June 1993): C11. http://dx.doi.org/10.1016/0022-328x(93)83209-e.

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Shilova, Inessa Vladimirovna, Natal'ya Vladimirovna Baranovskaja, Rustam Niyazovich Mustafin, and Nikolay Innokent'yevich Suslov. "FEATURES OF THE COMPOSITION MACRO ELEMENTS AND TRACE ELEMENTS OF THE EXTRACT OF ALFREDIA CERNUA (L.) CASS., POSSESSING PSYCHOTROPIC EFFECT." chemistry of plant raw material, no. 4 (December 27, 2019): 191–98. http://dx.doi.org/10.14258/jcprm.2019045422.

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The 95% ethanol extract of Alfredia drooping Alfredia cernua (L.) Cass. (Asteraceae) aerial part exhibits pronounced antidepressant, nootropic and anxiolytic activity. The aim of the work was the qualitative and quantitative analysis of macro-, trace and ultra trace elements of the pharmacologically active extract of the aerial part of the plant. The study of the elemental composition of the extract was performed after ashing using instrumental neutron activation analysis with irradiation with thermal neutrons. The study found 26 elements, of which eight are (conditionally) essential, two macro elements and four trace elements. The obtained results indicate the prevalence of Alfredia cernua of calcium, zinc, sodium, strontium, bromine, as well as iron, barium, cobalt, chromium and lanthanum in the pharmacologically active extract. The extract concentrates a specific group of elements (zinc, cobalt, thorium, hafnium, bromine, chromium, lutetium, lanthanum, strontium, samarium) in comparison with the feedstock, which can be explained by the formation of strong organometallic compounds and chelate complexes. Macro-, trace and ultra trace elements can have a significant impact on metabolic processes, nervous, immune, endocrine, cardiovascular systems, they are an integral part of enzymes, give other biologically active substances an easily digestible form and potentiate their effects.
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Blake, Paul C., Michael F. Lappert, Richard G. Taylor, Jerry L. Atwood, and Hongming Zhang. "Some aspects of the coordination and organometallic chemistry of thorium and uranium (MIII, MIV, UV) in +3 and +4 oxidation states." Inorganica Chimica Acta 139, no. 1-2 (December 1987): 13–20. http://dx.doi.org/10.1016/s0020-1693(00)84028-1.

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Dissertations / Theses on the topic "Organometallic ; Thorium"

1

Formanuik, Alasdair. "Investigations into the physical properties and reactivity of thorium(III) complexes." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/investigations-into-the-physical-properties-and-reactivity-of-thoriumiii-complexes(7c59099f-69be-4462-8178-a713d3ae994e).html.

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Investigations into the Physical Properties and Reactivity of Thorium(III) Complexes: A thesis submitted to The University of Manchester for the degree of Doctor of Philosophy in the Faculty of Science and Engineering. Since the first full structural characterisation of a thorium(III) complex 30 years ago, the chemistry of the highly reactive oxidation state has been largely neglected with respect to related uranium(III) chemistry. Despite the employment of nuclear technologies across the globe since the 1950's, the relatively poor understanding of the actinides is somewhat surprising, in particular the models used to describe their bonding. Herein, this work presents an investigation into the reactivity of a thorium(III) complex, [Th(Cp'')3] (Cp'' = {C5H3(SiMe3)2-1,3}-); the synthesis and full characterisation of a new thorium(III) complex, [Th(Cptt)3] (Cptt = {C5H3(tBu)2-1,3}-); and the synthesis of two new hexadentate trisanilido ligands which are shown to stabilise uranium(III) and offer highly flexible coordination modes. All of the compounds presented were characterised via a range of analytical and spectroscopic techniques. [Th(Cptt)3] is shown to react with a series of small molecules, displaying elevated reactivity in the majority of cases to the similar uranium(III) complexes. In this work, [Th(Cptt)3] is shown to activate: P4, pyridine, 4,4'-bipyridine, Ph2CO, MeCN, CS2 and CO2, to form dimeric thorium(IV) complexes. The reactivity studies presented provide the first real measure of the reductive capability of the thorium(III) oxidation state. The first pulsed EPR spectroscopy experiments on actinide containing complexes are reported for a pair of new complexes, [M(Cptt)3] (M = U, Th), with the results allowing the direct calculation, via measurement of hyperfine coupling constants, of bonding between the actinide elements and the supporting ligand framework. The results indicate that comparative covalent character is found for the studied actinide complexes with the only other f-element complex characterised by this technique, [Yb(Cp)3], challenging conventional bonding models.
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2

Tian, Shun. "Aspects of the organometallic chemistry of alkali metals, lanthanides and thorium." Thesis, University of Sussex, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387339.

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McKinven, Jamie. "Heteroleptic thorium terphenolate complexes for small molecule activation." Thesis, University of Edinburgh, 2016. http://hdl.handle.net/1842/19567.

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The chemistry and physical properties of actinide complexes has become increasingly significant and relevant since the dawn of the nuclear age. In addition to increasing the potency of nuclear power and the safety and disposal of its subsequent waste products, exploration of the chemistry of actinide complexes provides a fascinating insight into the increased complexity and divergence of reactivity of these complexes when compared to transition metal complexes. Chapter One provides a brief introduction to the chemistry of actinides and in particular, the major focus of this work, of thorium. This is followed by a survey of examples of rare examples of thorium complexes with a formal oxidation state other than Th (IV). Following this is a review of selected examples of thorium (IV) complexes exhibiting unusual reactivity surveying thorium hydride and alkyl complexes initially. This progresses into reviewing the chemistry of thorium complexes containing multiple bonds to non-metal atoms, beginning with carbon atoms and then progressing to atoms in the chalcogen and pnictogen groups. The introduction finishes with an investigation into the properties of the terphenolate ligands used in this study, including examples of unusual complexes that they have been shown to stabilise. In Chapter Two, an exploration into the catalytic activity of fairly simple actinide amide catalysts, N”2Th (IV) {k2-N(SiMe3)SiMe2CH2, N”2U (IV) {k2-N(SiMe3)SiMe2CH2} and UN”3, upon terminal acetylenes is presented. The chapter begins with a brief introduction summarising the previous reactivity observed in the catalysis of terminal acetylenes, with particular focus on actinide-based catalyst mediated reactions. The catalytic results on a variety of terminal acetylenes with different steric and electronic properties is then reported upon. It is found that high conversions and selectivities can be achieved upon optimisation of the catalytic process. It was also found that the different catalysts and substrates favoured different products, with selective oligomerisation and cyclotrimerisation reactions observed. The differing reactivities lend support to the role of f-electrons upon the catalytic route of the reaction. Conclusions are discussed at the end of the chapter. In Chapter Three, the synthesis and characterisation of heteroleptic terphenolate thorium chloride complexes and their subsequent reactivity was investigated. The synthesis and characterisation of ThCl2(OTerMes)2DME and ThCl2(OTerMes)2(H2O)3 are initially described. The reactivity of these complexes favoured transmetallation of the terphenolate ligands, with the complexes; [Li(OTerMes)THF]2, [Li(OTerMes)]2THF, μ3- (TerMesO)μ3-(CH2SiMe3)3Li4, LiAlH2(OTerMes)2, [(THF)K(OTerMes)]2, MgCl(OTerMes)(THF)2, MgBr(OTerMes)(THF)2 and Fe(OTerMes)2(py)2 synthesised and characterised from reactions attempting to transform the ancillary chlorido-ligands. The reactivity of ThCl2(OTerMes)2DME was found to not be solely transmetallation of the terphenolate ligands as elucidated by the synthesis and characterisation of [Th(OTerMes)2(Cl)2(4,4’- bipyridyl)1.5]∞ and [MgTh2μ2-Cl2μ3-Cl(OTerMes)2(C4H7)2μ-η3:η3(C4H7)H]. The synthesis of [MgTh2μ2-Cl2μ3-Cl(OTerMes)2(C4H7)2μ-η3:η3(C4H7)H] was found to proceed via a reductive elimination route with concomitant formation of a terphenolate transmetallation product Mg(OTerMes)2(THF)2. The formation of[Th(OTerMes)2(Cl)2(4,4’- bipyridyl)1.5]∞ was achieved via reaction with the Lewis base 4-4’ bipyridine. Reactions attempting to form heteroleptic uranium terphenolate complexes were also detailed. Conclusions are discussed at the end of the chapter. In Chapter Four, the synthesis and characterisation of heteroleptic terphenolate thorium borohydride complexes and their subsequent reactivity was investigated. It was found that the conversion of ThCl2(OTerMes)2DME to Th(BH4)2(OTerMes)2DME proceeded smoothly using a precedented reaction route. In contrast to ThCl2(OTerMes)2DME, reaction with a Lewis acid was found to result in abstraction of the solvating DME molecule, resulting in the synthesis and characterisation of Th(BH4)2(OTerMes)2. In similarity to ThCl2(OTerMes)2DME, Th(BH4)2(OTerMes)2DME was found to react with a Lewis base (4-4’ bipyridine) to form Th(BH4)2(OTerMes)2(4,4’ bipyridine)∞. However, despite the increased robustness and versatility of the borohydride complexes, transmetallation of the terphenolate complexes remained an issue as shown by the synthesis and characterisation of Mg(OTerMes)((μ-H)3BH)THF)2. Th(BH4)2(OTerMes)2 was found to be able to facilitate small molecule activation in a variety of substrates, encompassing CO, CO2 and CS2 amongst others. In most cases this small molecule activation favoured the formation of BMe3, with the concomitant formation of HB(OTerMes)2 in the case of CO2 and CS2. Attempts at catalysis of isonitriles and terminal acetylenes by Th(BH4)2(OTerMes)2 are presented with mixed results. Conclusions are discussed at the end of the chapter. In Chapter Five, investigations into the effects of changing the donor atom of the terphenyl moiety were probed. The chapter began by examining the differing properties of a phosphorous atom acting as a ligating atom, as opposed to the oxygen atom seen in Chapters Three and Four. The chapter continued by detailing the result of reactions attempting to synthesise and characterise terphenyl phosphino-actinide complexes. It was found that in the case of actinides with easily accessible lower oxidation states, i.e. U (IV), that reductive elimination was favoured, culminating in the isolation of (TerMesPH)2. Following this result attempts were made to modify the ligand system in an attempt to divert the reaction away from this product, in the hope of isolating a phosphino-actinide complex. Reactions attempting to ligate the terphenyl moiety via the aryl α-carbon to thorium were also detailed, resulting in radicular degeneration and the isolation of nBuTerTrip and ClTerTrip. Conclusions are discussed at the end of the chapter. Experimental and characterising data are provided in Chapter Six.
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Brusich, Mark John. "Theoretical Insights into the Bonding in Thorium Organometallic Complexes: A Comparison with Group IV Transition Metal Chemistry." Thesis, 1988. https://thesis.library.caltech.edu/5307/4/Brusich_MJ_1988.pdf.

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In this thesis a detailed ab initio theoretical study of organothorium chemistry is presented. The first part is devoted to examining both the bonding in and the reaction chemistry of various substituted thorium complexes. Using the chlorine ligand as a model for the usual cyclopentadienyl groups found in these systems, we examine the bonding of hydrogen and methyl ligands to thorium. Frequent comparisons with the experimental results on similar species are made. In addition, by contrasting the bonding in the thorium complexes with the bonding in the analogous Group IVB systems, a qualitative and quantitative picture of bonding, as the atomic number of the metal becomes larger, can be obtained. The reaction chemistry is studied via two different sets of processes. In the first, the deuterium (D2) exchange reaction with a thorium-hydrogen bond is examined. Several studies have been done previously, both experimentally and theoretically, on the Group IVB exchange reactions. Hence, there is enough information to see trends and to make predictions about relative reaction rates. Also, from our investigation the effect that different types of ligands have on the activation barrier to reaction can be ascertained.

In the second part of the thesis, the factors that go into stabilizing bond formation are discussed concerning both main group elements and transition metals, including actinides. In particular, the process of bond formation between hydrogen atom and the alkali metals is compared with the same process in the Group IVB-hydrogen and thorium-hydrogen saturated complexes. The main difference between the alkali metal and the transition metal bonds with hydrogen is the bond strength trends with increasing atomic number. For the alkali metals the bond energies decrease down the column, yet for the transition metals and thorium it is the reverse. The conclusion is that the shape of the mostly d in character transition metal bonding orbitals is such that better overlap can be achieved with hydrogen as the orbitals become more diffuse. In the alkali metals the bonds can be described as s—s bonds whose overlap decreases with increasing diffuseness.

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Books on the topic "Organometallic ; Thorium"

1

(Editor), Rudolf Keim, Cornelius Keller (Editor), and Sten Ahrland (Editor), eds. Gmelin Handbook of Inorganic and Organometallic Chemistry - 8th Edition Element T-H Th. Thorium (System-NR. 44) Supplement A-E Supplement Part D Chemi. Springer, 1987.

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Keller, Cornelius, Rudolf Keim, and Hermann O. Haug. Gmelin Handbook of Inorganic and Organometallic Chemistry - 8th Edition Element T-H Th. Thorium (System-NR. 44) Supplement A-E Supplement Part D Chemi. Springer, 1990.

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Wedemeyer, Horst, Hans U. Borgstedt, and Wolfgang Huisl. Gmelin Handbook of Inorganic and Organometallic Chemistry - 8th Edition Element T-H Th. Thorium (System-NR. 44) Supplement A-E Supplement Part B Gmeli. Springer, 1992.

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Kleykamp, Heiko. Gmelin Handbook of Inorganic and Organometallic Chemistry - 8th Edition Element T-H Th. Thorium (System-NR. 44) Supplement A-E Supplement Part C Die V. 8th ed. Springer, 1992.

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Benz, R., A. Naoumidis, and D. Brown. Gmelin Handbook of Inorganic and Organometallic Chemistry - 8th Edition Element T-H Th. Thorium (System-NR. 44) Supplement A-E Supplement Part C Die V. Springer, 1987.

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Keller, Cornelius, Karl-Christian Buschbeck, and Kenneth W. Bagnall. Gmelin Handbook of Inorganic and Organometallic Chemistry - 8th Edition Element T-H Th. Thorium (System-NR. 44) Supplement A-E Supplement Part C Die V. Springer, 1988.

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Keim, Rudolf, Horst Wedemeyer, and Michael Bickel. Gmelin Handbook of Inorganic and Organometallic Chemistry - 8th Edition Element T-H Th. Thorium (System-NR. 44) Supplement A-E Supplement Part C Die V. Springer, 1993.

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Nigel, P., H. Geckeis, and J. H. Holloway. Gmelin Handbook of Inorganic and Organometallic Chemistry - 8th Edition Element T-H Th. Thorium (System-NR. 44) Supplement A-E Supplement Part C Die V. Springer, 1993.

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Feinauer, Dieter, and Kate Grudpan. Gmelin Handbook of Inorganic and Organometallic Chemistry - 8th Edition Element T-H Th. Thorium (System-NR. 44) Supplement A-E Supplement Part a the E. Springer, 1989.

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Wedemeyer, Horst, and Buschbeck. Gmelin Handbook of Inorganic and Organometallic Chemistry - 8th Edition Element T-H Th. Thorium (System-NR. 44) Supplement A-E Supplement Part C Die V. Springer, 1985.

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Book chapters on the topic "Organometallic ; Thorium"

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Macintyre, J. E., F. M. Daniel, D. J. Cardin, S. A. Cotton, R. J. Cross, A. G. Davies, R. S. Edmundson, et al. "Th Thorium." In Dictionary of Organometallic Compounds, 217–18. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4757-4966-3_58.

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MacIntyre, Jane E. "Th Thorium." In Dictionary of Organometallic Compounds, 282–83. Boston, MA: Springer US, 1996. http://dx.doi.org/10.1007/978-1-4899-6848-7_56.

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Macintyre, J. E. "Th Thorium." In Dictionary of Organometallic Compounds, 351–52. Boston, MA: Springer US, 1986. http://dx.doi.org/10.1007/978-1-4615-6847-6_53.

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Cotton, S. A. "Th Thorium." In Organometallic Compounds of the Lanthanides, Actinides and Early Transition Metals, 176–84. Boston, MA: Springer US, 1985. http://dx.doi.org/10.1007/978-1-4899-7164-7_30.

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ERKER, GERHARD, and THOMAS MÜHLENBERND. "(η4-BUTADIENE) BIS (η-PENTAMETHYLCYCLOPENTADIENYL) THORIUM." In Organometallic Syntheses, 6–8. Elsevier, 1988. http://dx.doi.org/10.1016/b978-0-444-42956-8.50009-8.

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