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Showing 1 to 20 of 113 for “"Rhenium"”.
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The system tantalum-rhenium
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Metallurgy, 1960.
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Rhenium (VII) cis-dioxo complexes
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1996.
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Thiophene derivatives of rhenium and titanium
Significant strides have recently been made involving organometallic modeling of hydrodesulfurization (HDS). These studies have typically utilized late transition metals with high d-electron counts. This thesis focuses on three areas, (i) the synthesis of high oxidation state metal-oxo derivatives …
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Surface-cycling of rhenium and its isotopes
The application of elemental and isotopic metal palaeoredox tracers to the geologic past rests on an understanding of modern metal cycles. This study reevaluates the surface-cycling of Mo and Re in near-surface reservoirs. Revised river averages of Mo and Re are 1.8- and 7.9-fold larger than …
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Synthesis of Rhenium and Manganese Pyridazoal Complexes
… complexes. Thalium Cp salts were converted to Rhenium and Magnenese complexes through transmetalation. We have had success with the off-metal route at both higher yields and greater purity than the previous published on-metal route. These compounds have been fully characterized by <sup>1</sup>H …
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Synthesis and Characterization of Some Rhenium Complexes
… and expanding upon that by the addition of a rhenium metal to an organic compound, (1,2-C5H3(CNR)2) and this should offer some new and interesting chemical properties. These new properties are; new optical properties, new electronic properties, improved physical properties, and a reversible …
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Surface-cycling of rhenium and its isotopes
The application of elemental and isotopic metal palaeoredox tracers to the geologic past rests on an understanding of modern metal cycles. This study reevaluates the surface-cycling of Mo and Re in near-surface reservoirs. Revised river averages of Mo and Re are 1.8- and 7.9-fold larger than …
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Technetium and rhenium complexes of tripodal ligands
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1992.
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Heterogeneous catalytic studies with rhenium cluster-based precursors
When (Re(CO)$\sb3$OH) $\sb4$ was supported on Al$\sb2$O$\sb3$ followed by heating in H$\sb2$ no decomposition gas products, CO and CH$\sb4$, were observed below 650 K. Following the activation by infrared spectroscopy showed the formation of Re(CO)$\rm\sb3\{O$-$\rm Al\}\{HO$-Al$\}\sb2$ at 480 K. …
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The marine geochemistry of rhenium, iridium and platinum
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, and Woods Hole Oceanographic Institution, 1991.
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The Synthesis and Characterization Of A Functionalized Diethylenetriamine Rhenium Complex Followed By Analytical Analysis of Novel Rhenium-Luteinizing Hormone-Releasing Hormone Conjugates
… is complicated. Here we use non-radioactive rhenium (Re) in [Re(CO)3L]+ analogues to serve as safer models for 99mTc complexes. Furthermore, complexes with a [Re186/188(CO)3L]+ core have also shown promise in both medical diagnostic imaging and targeted cancer treatment. Here we synthesized …
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Plasma arc excitation for the spectrographic determination of rhenium
Call number: LD2668 .T4 1965 C45
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Plasma arc excitation for the spectrographic determination of rhenium
Call number: LD2668 .T4 1965 C45
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Chemistry of rhenium(I) tricarbonyl complexes of biomedical relevance
<p class=MsoNormal style='text-align:justify;text-justify:inter-ideograph; text-indent:.5in'><span class=GramE><i style='mso-bidi-font-style:normal'>fac</i>-[</span><span class=SpellE>Re<sup>I</sup></span>(CO)<sub>3</sub>L]<sup>n</sup> complexes serve as models for short-lived <i …
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Alkyl, alkylidene, and alkylidyne complexes of rhenium and osmium
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1995.
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Synthesis and reactivity of rhenium and technetium polyaryl complexes
Chapter 1. The organometallic chemistry of rhenium includes a variety of [sigma]-aryl complexes. The syntheses and structures for these complexes follow a pattern that relates predominantly to their oxidation states. The high oxidation state compounds all contain oxo or imido ligands. The low …
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Synthesis and characterization of technetium and rhenium organohydrazide complexes
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1997.
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On Metal synthesis of Some Substituted Rhenium and Manganese Complexes
… <p>Our recent efforts focused in attaching Rhenium and Manganese ligands/substituents (process in which is called doping) that would cause oxidation to occur to our polymer making it a p-type polymer. Since p-type polymers charge carriers leave a vacancy that does not delocalize completely. …
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Low magnetic field transitions of rhenium near the critical temperature
… than 10 to the -5 Gauss. For the single crystal rhenium sample isothermal magnetization curves were obtained with thermodynamic critical fields Hc between 4mG and 0.3G. The slope of Hc(T) vs. T was found to be not constant near the zero field transition temperature To. For Hc(T))>100mG a slope of …
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