UNT Theses and Dissertations - 3 Matching Results

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Ligand Substitution Studies in the Tetracobalt Cluster Co₄(CO)₁₀([mu]₄-PPh₂) and Synthesis and Reactivity Studies in the Fe₂Pt and FeCo₂ Mixed-metal Clusters

Description: The kinetics of ligand substitution for CO in Co4(CO)10(mu4-PPh2) , 1, have been investigated for the ligands P(OMe)3, P(OEt)3, PPh2H, P(0-i-Pr)3, P(n-Bu)3, PPh3, P(i-Pr)3, and PCy3 over a wide temperature range.
Date: August 1991
Creator: Don, Ming-jaw
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Reactions and Kinetics of Photogenerated Silylenes and Silenes

Description: Trapping reactions, matrix isolation and kinetics of a few photogenerated silylenes and silenes have been studied. Several vinylsiliranes, the long sought intermediates from the addition of dimesitylsilylene to various 1,3-dienes, have been made and characterized. The product study by various nmr techniques demonstrates that the silylene addition to the dienes is highly stereospecific and the addition to the cis v bond is about 9 times faster than to the trans one in gis,trans-2,4-hexadiene. Hi… more
Date: August 1991
Creator: Zhang, Shizhong
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Static and Flow Properties of Dilute Polymer Solutions

Description: Small weight percentages of certain high-molecular weight polymers added to liquids in turbulent flow through conduits can result in dramatic friction reduction. Although many current and potential uses of the drag reduction phenomenon exist, there is a fundamental problem: drag reduction efficacy decreases rapidly with flow time due to the mechanical degradation in flow of the added polymer. In this thesis study, dilute aqueous solutions of polyacrylamide were tested under turbulent flow condi… more
Date: August 1991
Creator: Whang, Kyu-ho
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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