Palladium-catalyzed homocoupling reaction of aryl boronic acids has been developed using a protocol similar to the well-documented crosscoupling reaction. -Halocarbonyl compounds are applied to initiate the reaction via oxidative addition to a palladium(0) species. The resulting palladium enolate halide can promote the double transmetallation. Reductive elimination generates the desire homocoup...

Chemical modification techniques are widely used in graphite furnace atomic absorption spectrometry (GFAAS). Palladium is a very effective chemical modifier and can be used to stabilize many elements to several hundred degrees higher than the temperatures possible with current methods [1-9]. Of the elements tested, the greatest temperature shifts are achieved for the semi-metallic elements such...

We report a route to benzosultams that exploits the palladium-catalysed aminsulfonylation of alkenyl iodides as initial step. An (Z)-configured iodide substrate is combined with DABSO, N,N-dialkylhydrazine nucleophile and palladium(0) catalyst achieve aminsulfonylation. A second palladium(0)-catalysed transformation, this time intramolecular, leads benzosultam formation. Good variation starting...

Sawadjoon, S. 2013. Palladium-Catalyzed Nucleophilic Substitution of Alcohols. Mechanistic Studies and Synthetic Applications. Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology 1092. 63 pp. Uppsala: Acta Universitatis Upsaliensis. ISBN 978-91-554-8785-0. This thesis deals with the palladium-catalyzed nucleophilic substitution of π-activated alco...

Selected results of investigations focused on the changes to some mechanical properties palladium and several palladium-based alloys caused by exposure hydrogen have been collected presented. The findings indicate that pure are highly susceptible alteration upon hydrogen. In cases alloying with silver copper, alloys, as compared palladium, appear resist properties. case manganese, interesting o...

This paper describes self-assembled monolayers (SAMs) on palladium that resist the nonspecific adsorption of proteins and the adhesion of mammalian cells. These SAMs form when thin films of palladium are exposed to solutions of alkanethiol with the general structure HS(CH(2))(m)()(OCH(2)CH(2))(n)()OH (m = 2, 11; n = 3, 6, 7). Ellipsometry and surface plasmon resonance spectroscopy (using a pall...

The palladation of potentially chelating bisimidazolium ligand precursors with palladium acetate gives bridging bimetallic, chelating monometallic, and homoleptic tetracarbene complexes. The coordination mode of the biscarbene ligand has been identified by spectroscopic analysis and crystallographic characterization of representative complexes, including the first example of a biscarbene A-fram...

Several novel palladium triphosphine complexes have been synthesized and tested as recyclable catalysts for the methoxylation of alkynes into acetals in ionic liquids. A complete conversion of phenylacetylene was achieved with only 0.2% of [Pd(Triphos)NCMe][(PF6)2] in a methanol/[BMIM][BF4] mixture. We discovered that the addition of an ionic liquid to methanol allowed not only to increase the ...

Impingement of high fluxes of helium ions upon metals at elevated temperatures has given rise to the growth of nanostructured layers on the surface of several metals, such as tungsten and molybdenum. These nanostructured layers grow from the bulk material and have greatly increased surface area over that of a not nanostructured surface. They are also superior to deposited nanostructures due to ...

A method for the determination of total selenium in wheat and wheat flour using graphite furnace atomic absorption spectrometry (GFAAS) with palladium/ascorbic acid as a chemical modifier was studied. The effects of nickel nitrate, palladium/ascorbic acid, and palladium/magnesium nitrate as chemical modifiers on the sensitivity in the determination of selenite, selenate and selenomethionine by ...