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.
Results
Showing 1 to 20 of 23 for “"thiolates"”.
-
The characterization and chemistry of {\it mono\/}- and {\it bis\/}-cyclopentadienyl titanium thiolates.
The reactions of Cp$\rm\sb2TiCl\sb2$ with the dithiols, HS(CH$\sb2)\sb{\rm n}$SH (n = 2, 3) in the presence of imidazole proceed with formation of imidazole$\cdot$HCl affording relatively insoluble titanocene dithiolate derivatives 2.1 and 2.2 respectively. Alternatively, 2.2 can be prepared by the …
-
Structural studies of phosphinegold(I) thiolates with potential medicinal applications / by Douglas Robert Smyth.
… the solid state chemistry of phosphinegold(I) thiolates remains difficult to predict when competing intra- and inter-molecular forces are present.
-
Alkyl transfer to metal thiolates and models for the repair of DNA aklylation damage
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1997.
-
Synthetic approaches to new three coordinate Group 6 compounds : chromium alkenyls, molybdenum thiolates and tungsten amides
A series of alkenyl (-C[Ad]Ar) and thioalkenyl (-SC[Ad]Ar, Ad=2-adamantylidene, Ar=3,5-Me2C6H3, 4-tBuC6H4, 3,5-(C6H5)2C6H3, 3,5-(4-tBu-C6H4)2 C6H3) ligands have been prepared. The alkenyl ligands are synthesized by bromination and dehydrohalogenation of an adamantyl olefin to yield an alkenyl …
-
High oxidation state organometallic and coordination chemistry: The synthesis and reactivity of nitridoosmium(VI) thiolates and alkoxides
Transition metal-thioaldehyde complexes were reviewed in Chapter 1. A series of organoosmium(VI) thiolate complexes, (Os(N)$\rm(CH\sb2SiMe\sb3)\sb2(\mu$-SR) $\sb2$ (R = Et, CMe$\sb3,$ CHMe$\sb2,$ CH$\sb2$CHMe$\sb2,$ CH$\sb2$Ph), and the tetraalkoxide and tetrathiolate complexes $\rm\lbrack …
-
Structural and Functional Models of the Iron -Only Hydrogenase Enzymes
… the first members of a new class of iron thiolates. Crystallographic characterization established that the 34 e- dinuclear core resembles the [Fe 2]H portion of the H-cluster. Treatment of [Fe2(S 2C3H6)(CNMe)7](PF6) 2 with excess CNMe led to [Fe2(S2C3H 6)(CNMe)10](PF6)2; the rate of …
-
Zinc enzyme model complexes with Ligands containing a N2S Donor Set and their methylating reactions
… of the reactions indicates <br>that zinc-bound thiolates react with those methylating reagents. The methyl <br>group transfer occurs like in the enzymatic processes.
-
Preparation of Dehydropeptides and Their Application in the Convergent Synthesis of Peptide Conjugates
… through the Michael addition of corresponding thiolates to dehydropeptides. Furthermore, the preparation of dehydropeptides and the Michael addition were also illustrated to be compatible with solid phase.
-
Recombinant Human Betaine -Homocysteine S -Methyltransferase: Discovery as a Zinc Metalloenzyme, and Regulation of Activity by Redox Status
… disulfide bond between two of the three thiolates that normally chelate Zn. When oxidized, the loss of activity is likely due to the change in the electronics of the Zn-ligand interactions.
-
New high nuclearity carbonyl clusters
… may display the same ligand capability of thiolates and go beyond. Indeed, the above clusters bring structural resemblance to the structurally characterized gold thiolates by showing Fe-Au-Fe, rather than S-Au-S, staple motives. Staple motives, the oxidation state of surface gold atoms and …
-
Conjugated dithiols as model systems for molecular electronics: assembly, structure, and electrical response
… precursors which are converted in-situ to thiolates using NH4OH. We elucidated how the type of substrate, the solvent quality, and the concentrations of NH4OH and the thioacetyl precursors affect the final structures of these assemblies. BPDT molecular assemblies are disordered on both gold …
-
New Chemistry of Mercaptoazulenes and Low-Valent Complexes of Isocyanoarenes
… in materials with luminescent capabilities. Thiolates have also been studied as junction groups used to attach organic compounds with extended π systems to electrodes. Linear asymmetric dimercaptoarenes are rare, but are intriguing for electronics and construction of molecular electronic …
-
Pd-Catalyzed Cross-Coupling, High Throughput Experimentation, and Machine Learning
… and agricultural applications. Since thiols and thiolates strongly bind late transition metals, previous research has focused on catalysts supported by chelating, bisphosphine ligands, which were considered less likely to be displaced during the course of the reaction. We show that by using …
-
Zur asymmetrischen Synthese von Beta-Thio-Alpha-Aminosäuren
… which is nucleophil substituted with thiolates. After acidic hydrolyses of the acetals the correspending sulphur-substituted aldehydes are obtained. In the first approach the aldehyde is transformed into the chiral Imine and subsequently alpha-alkylated. Because of the low …
-
NEW NCN-PLATINUM(II) COMPLEXES WITH LUMINESCENT PROPERTIES
… These ancillary ligands are two aromatic thiolates, a simple azide, a phthalimide, a thioacetate and an isothiocyanate. The substitution reactions were carried out in acetone or MeOH, at room temperature and under Argon atmosphere, using a large excess of the new ligand. iii) Finally, …
-
Cyclometallated platinum and iridium complexes with thiolate ligands, and novel bioimaging agents inspired by dynamic disulfide interchange reactions
… n = 0,1) is described and their reactions with thiolates are explored with the aim of producing new classes of thiol sensors. Thus, novel monometallic complexes of the type [Pt(N^C^N)(thiolate)] and [Ir(N^C^N)(N^C)(thiolate)] are reported as well as a novel series of dimers with the general …
-
Mixed-valence bimetallic dithiolates of iron, cobalt, and nickel and their relevance to the hydrogenases
… possess bimetallic cores bridged by thiolates. The iron centers are ligated by species that are peculiar in biological systems: carbon monoxide and cyanide. Due to the effectiveness of H2ases as H2 oxidation proton reduction catalysts, there is a strong drive to synthesize small …
-
Development And Applications Of Thioacids In Peptide Chemistry And Exploration Of Methods Toward The Stereochemical Elucidation And Synthesis Of Virgineone
… of various â-thiolactones with soft aromatic thiolates to form thiocarboxylates, with subsequent trapping in-situ by Mukaiyama's reagent or Sanger's reagent in presence of an amine to form amide bonds.</p> <p>In chapter five, studies toward the assignment of configuration and the total …
-
Nitric oxide reactions of bio-Inspired zinc and cobalt complexes
… is discussed. Chapter 3. Reactions of Organozinc Thiolates with Nitrosonium Ion: C-Nitroso Formation by Intramolecular Transnitrosation The organometallic species [ZnPAThEt] and [ZnPAThMes] are prepared, and their reactions with NOBF4 are characterized. The formation of C-nitrosoethane and …
-
Bioadhesion to model thermally responsive surfaces
… (SAMs) of hexa(ethylene glycol) and alkyl thiolates (mixed SAM) and poly(N-isopropylacrylamide) (PNIPAAm). The synthesis of hexa(ethylene gylcol) alkyl thiol (C11EG6OH) is presented along with the mass spectrometry and nuclear magnetic resonance results. The mixed SAM surface was confirmed …
Page 1 of 2