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 20 of 2631 for “"reactivity"”.
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The Reactivity of Tetrathioperrhenate
The reaction of ReS4- with nitriles in the presence of S8 yielded azadithiolene (S2NCR 2-) complexes, ReS(S4)(S2NCR)- (R = C6H5, 4-C6H4CF 4, 4-C6H4CO2Me, or 4-C6H 4NO2). The reaction of ReS4- with CF3CN in the presence of 1/8 equiv of S8 yielded ReS(S2NCCF3)2-, in the presence of Me3NO this …
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Reactivity, Coping, and Adjustment after Bereavement
… associations between age, gender, emotion reactivity, coping, history of depression, grief, and adjustment (in terms of both positive and negative well-being) using a structural equation model (chi2 (50) = 165.143, p < .001, chi2/df = 3.30, CFI = .939, GFI = .944, RMSEA = .075). The model …
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Cardiovascular Reactivity to Forgiveness in Females
Empirical evidence exists directly relating forgiveness to physiological markers of cardiovascular health based on the manner in which individuals respond to interpersonal offenses. Extant literature has identified the harmful effects of stress in cardiovascular disease and health in general and …
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Reactivity of the Vinylogous Epoxyketone Moiety
… characterization of the model are presented. The reactivity of the model was predicted from molecular orbital calculations and the hard and soft acid base (HSAB) theory. These results are compared to experimental results obtained from adding various nucleophiles. A hard nucleophile, phenyl …
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Increased Microglial Reactivity Alters Morphine Analgesia
… use disorder. In addition, increased microglial reactivity can alter analgesic response to opioids. Thus, understanding the role of microglia in response to opioids is both critical for improving the analgesic efficacy of opioids and for interfering with the negative side effects associated with …
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The structure and reactivity of metallohydroporphyrins
Metallohydroporphyrins are metal-containing porphyrins that have been reduced at one or more of the porphyrin macrocycle positions. Such complexes have been identified as being essential in a variety of biological systems including nitrite and sulfite reductases and S-methyl coenzyme M reductase. …
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Inclusion compounds : structure, reactivity and selectivity
This thesis is concerned with structure, thermodynamic and kinetic aspects of a variety of inclusion compounds which contain small organic guests. The host compounds studied are alkaline-earth metal salts of O,O’-dibenzoyl-(2R, 3R)-tartraric acid (magnesium, calcium and strontium), …
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Bioorthogonal Reagents: Design, Synthesis, and Reactivity
… cyclic dienes that accelerate or impede their reactivity in Diels–Alder reactions. I show that 4H-pyrazoles can react rapidly as Diels–Alder dienes upon the induction of hyperconjugative antiaromaticity and predistortion. These dienes can also be stabilized to biological nucleophiles allowing …
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Synthesis and reactivity of triphenyllead compounds.
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1993.
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Synthesis and reactivity of technetium hydrides
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1995.
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Characterization and Reactivity of Mo₂C
Two types of Mo₂C have been investigated: polycrystalline β-Mo₂C and single crystal α-Mo₂C. The β-Mo₂C material was synthesized via a temperature-programmed method, and then characterized using x-ray diffraction (XRD), x-ray photoelectron spectroscopy (XPS), CO chemisorption, and N₂ physisorption. …
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Sharing the Burden of Reactivity: Synthesis, Characterization, and Reactivity of Phosphino-Alkoxide First-Row Transition Metal Complexes
Bond activation is both central in many reaction mechanisms and essential to industrial production of chemicals. Many industries, such as pharmaceutical and petrochemical production, use precious metals to perform critical synthetic transformations that rely on bond activation. Due to the scarce …
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The Reactivity of Ditetrelenes Towards Organophosphorus Oxides
The reactivity of tetramesityldisilene 4 and tetramesityldigermene 5 towards organophosphorus oxides was explored in this thesis. The reaction of dialkyl and diarylphosphine oxides and phosphites with ditetrelenes 4 and 5 resulted in a 1,3-addition to form diorganodisilyl and digermyl phosphinites …
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THREE STUDIES OF 2-PYRIDONE PHOTOADDUCT REACTIVITY
2-Pyridones such as iii undergo efficient [4+4] photocycloaddition reactions, yielding strained tricyclic cyclooctadiene structures iv and v, with functionality at every carbon. As part of a program to develop the chemistry of these complex adducts, three studies have been conducted. Halogenation …
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