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Showing 1 to 20 of 449 for “"organometallic"”.
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Organometallic Polymerization Catalysts
A study has been made of the polymerization of styrene initiated by vanadium-based Ziegler-Natta catalysts, the most active of which was formed from VOC1₃/A1Et1.5Cl1.5 and was the most active also for the copolymerization of ethylene and propylene. A dilatometric study of the polymerization, using …
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Pioneering investigations into organometallic electrochemistry
… and electrochemical properties of three diverse organometallic systems. In chapter 2, the first experimental determination of a an unsupported AuII-AuII bond is reported. The electrochemical characterisation of gold(III) hydride, hydroxide and chloride pincer complexes based on a backbone of a …
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Novel Organometallic Mixed Valence Complexes
Organometallic mixed valence complexes have been studied extensively over the past 30 years providing many synthetic and theoretical challenges. This thesis has sought to provide the field with a unique family of mixed valence complexes through which theories of electron transfer in weakly coupled …
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Organometallic molecules with nonrigid structures.
Massachusetts Institute of Technology. Dept. of Chemistry. Thesis. 1971. Ph.D.
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The synthesis of novel organometallic materials.
Due to their highly interesting electroactive properties, complexes based on the sulphur heterocycle DMIT have been studied extensively for several decades. The literature is abundant with materials exhibiting semiconducting and metallic properties and up to early 2000 there are eight examples of …
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Aspects of organometallic chromium nitrosyl chemistry
The behavior of a series of paramagnetic organometallic complexes, CpCr(N0)(L)X, (Cp = 175-05H5; L = phosphine or amine; X = Cl or I) in solutions has been investigated by ESR spectrometry and cyclic voltammetry. The 17-valence electron CpCr(N0)(L)X compounds undergo ligand substitution in donor …
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Organometallic precursors for pillared clay synthesis
… for improvement in conductivity to be observed. Organometallic intercalation of a range of organotellurium compounds with laponite provided evidence that a hydrolysis reaction on the clay surface followed by the release of hydrochloric acid was an important first step if a reaction was to occur …
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Chiral Organometallic osmium(VI) Nitrido Complexes
The chiral-at-metal complex [Os(N)(CH2SiMe3)MeCl 2]- forms in a reaction of a mixed tetraalkyl osmium nitrido complex with pyridinium chloride. Reactions between Ag2CrO 4 and [Os(N)(CH2SiMe3)MeCl2] - or [Os(N)(CH2SiMe3)PhCl2] - give chiral-at-metal heterobimetallic complexes that catalyze the …
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Diastereoselectivity of Organometallic Additions to Nitrones
Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs
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Synthetic studies towards an organometallic rotaxane
… to assess the viability of the synthesis of an organometallic rotaxane in which the transition metal is covalently bonded to a carbon atom of an alkyl group. The formation of a rotaxane using the host cyclophane, cyclobis (paraquat-pphenylene), formed by a template effect, has been investigated …
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Organometallic Chemistry in Fe–S Clusters
The organometallic chemistry of Fe–S clusters has emerged as a new area in Fe–S enzyme biochemistry. In particular, alkylated [Fe₄S₄] clusters are now thought to be important intermediates in several classes of enzymes, including radical S-adenosyl-L-methionine (SAM) enzymes and enzymes involved in …
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Probing Organometallic Reactions With 19F NMR
This dissertation explores fundamental aspects of the reaction of group 4 metallocenes with methylaluminoxane (MAO) that lead to active Ziegler-Natta olefin polymerization catalysts. A novel experimental approach is described, in which a unique spectroscopic probe (a fluorinated substituent) is …
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Understanding Reactive Organometallic Complexes through Mass Spectrometry
Contains fulltext : 312682.pdf (Publisher’s version ) (Open Access)
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Computational chemistry of organometallic and inorganic species
This thesis presents computational investigations of problems related to redox processes and structural rearrangement in inorganic systems. Density functional theory has been used to gain insight into the origin and nature of such reactions. The work presented concerns two main topics: …
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Organometallic and Inorganic Derivatives of the Tetrathiometallates
… the preparation of a number of low-valent organometallic derivatives of MoS$\sb4\sp{2-}$ and WS$\sb4\sp{2-}$ was undertaken. The complex ((COD)Rh) $\sb2$WS$\sb4$ 1 was prepared from the direct reaction of equimolar amounts of ((COD)RhCl) $\sb2$ and (Ph$\sb4$P)$\sb2$WS$\sb4$. Compound 1 was …
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Spectroscopic Studies of Penta-Coordinate Organometallic Complexes
Made available in DSpace on 2014-12-10T23:01:48Z (GMT). No. of bitstreams: 1 7412153.pdf: 4457896 bytes, checksum: ad972943f91ce8f17a6016320fa9f96f (MD5) Previous issue date: 1973
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Group I and Iii Organometallic Exchange Reactions
Made available in DSpace on 2014-12-09T17:35:43Z (GMT). No. of bitstreams: 1 6706775.pdf: 2848933 bytes, checksum: 494af9246df24c89221ed25f1f9c87f1 (MD5) Previous issue date: 1966
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