Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 14 of 14 for “"Chlorine Atoms"”.
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Comparative fates of three structurally distinct PCB congeners in rats and house flies
… are influenced by the number and position of chlorine atoms on the biphenyl rings. The excretion and tissue retention of three $\sp{14}$C-labeled structurally distinct lower chlorinated PCBs (2,2$\sp\prime$,5-tri-, 2,2$\sp\prime$,4,4$\sp\prime$-tetra- and …
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The effect of methyl groups on nucleophilic substitution reactions of chlorocyclotriphosphazenes
… a single methyl group is found to activate the chlorine on the same phosphorus atom, while a pair of geminally substituted methyl groups is found to deactivate the chlorine atoms on a different phosphorus atom. The results allow a new interpretation of the substitution patterns of various …
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Synthesis and Coordination Chemistry of Functionalised Phosphazanes
… Chapter 3 concerns the substitution at the chlorine atoms of [ClP(μ-NR)]$_2$ by LiSH to give a variety of sulfur-containing PV species [S=P(H)(μ-NR)]$_2$. The thermodynamic preference for the cis or trans isomers of the latter are explored by detailed NMR spectroscopic and DFT calculation …
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The chemistry of chlorine in combustion systems and the gas-phase formation of chlorinated and oxygenated pollutants
… Under fuel-lean conditions, oxygen and chlorine compete for the available hydrogen to form H2O and HCl respectively. Laboratory reactor experiments show that, at short residence times (<100ms), relatively large amounts of chlorine atoms and Ch can be present under oxygenrich conditions. …
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Bound antioxidants in elastomers
… (ECH) rubbers with their reactive chlorine atoms. These reactions take place during high shear mixing in a torque rheometer or in a Winkworth mixer at high temperature or during the vulcanization of the elastomers at 160°C. Mixed alkyl, aryl secondary amines are shown to react only …
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Rapid reductive dechlorination of environmentally hazardous aromatic compounds and pesticides
Organochlorine compounds, such as polychlorinated biphenyls (PCBs), pentachlorophenol (PCP), p,p'-DDE and Toxaphene, have been widely used in industry and agriculture for more than fifty years. Although they have served their purpose very effectively and at low cost, many of these compounds have …
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An Evaluation of Tellurium Compounds as Polymer Stabilisers
… shown to neutralise hydrogen chloride, replace chlorine atoms of chlorohydrocarbons with carboxylate groups and also have the ability to stoichiometrically decompose peroxides. The effect of organotellurium compounds on PVC during processing, thermal ageing and UV irradiation was examined by …
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Solving the crystallographic structure of the Cl2J construct and occupancy titration trials to quantitatively determine isomer ratio
Halogen atoms are commonly found in biological organic compounds such as plastic polymers, flame retardants, coolant fluids, insecticides and herbicides. Halogens are known to mediate neurotransmitters in the brain and are required for the production of many hormones (i.e. thyroxine). Because …
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Synthesis and Characterization of Highly Porous Borazine-Linked Polymers via Dehydrogenation/Dehydrocoupling of Borane-Amine Adducts and Their Applications to Gas Storage
… sites of the pores are aligned with hydrogen atoms contrasted with the recently reported halogenated BLPs which consist of pore channels aligned with bromine or chlorine atoms. One of the reported BLPs, BLP-2(H), was proven to be crystalline by PXRD, matching the experimental pattern to …
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Coating and Doping of Ge QDs
… LiAlH4 results in Ge QDs with a low level of chlorine atoms on the surface; however, during the H2PtCl6 catalyzed alkylation of the surface with allylamine, chlorine functionalization of the surface occurs resulting in p-type doping of the QD. A similar location of the dopant is proposed for …
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Novel Host Materials for Blue Phosphorescent Organic Light-Emitting Diodes
… ring of alternating phosphorus and nitrogen atoms. Each phosphorus atom bears two aromatic substituents attached via a non-conjugated linkage. Depending on the type of linkage to the central phosphazene core two sets of host materials can be distinguished: phenoxy substituted phosphazenes …