Papers by Santiago Roberto Ulloa Lopez
Journal article by Will Wilkinson; The Cato Journal, 2006
Understanding the process of economic change would enable us to account for the diverse performan... more Understanding the process of economic change would enable us to account for the diverse performance of economies, past and present. We would be able to account for the long history of sustained growth of the United States and western Europe, the spectacular rise ...
En los años de la autarquía se pusieron en marcha un conjunto de reglamentaciones que querían&quo... more En los años de la autarquía se pusieron en marcha un conjunto de reglamentaciones que querían" refundar" los centros de investigación con cierta historia, es decir, anteriores a la guerra civil, como por ejemplo, el Instituto Español de Oceanografía, creado en 1914, y reorganizado en diciembre de 1939 y el Instituto Nacional de Técnica Aeronáutica (INTA) en 1942, que era heredero del Laboratorio de Cuatro Vientos creado en 1921. Sin embargo, aquellas ordenaciones hoy nos transmiten la idea, de que lo que predominaba ...
Acta Crystallographica Section A Foundations of Crystallography, 2005
Gold(I) chloride complexes catalyze a wide range of reactions, in the presence of different silve... more Gold(I) chloride complexes catalyze a wide range of reactions, in the presence of different silver(I) salts. In particular alkoxycyclization and skeletal rearrangement of 1,6-enynes proceed at room temperature with [Au(PPh 3) Cl]/AgSbF 6. [1] In addition, dienynes and 1,6-enynes with an aryl ring at the alkyne, give [4+2] products in a reaction catalyzed by gold(I) complexes with bulky phosphines. [2] In order to avoid the use of silver salts, we have synthesized new cationic complexes with bulky phosphines. The preparation of this new type of gold(I) compounds involves the reaction with AgSbF 6 in different coordinating solvents. When aromatic solvents are used, a new type of complexes are formed, which show an interaction between the arene and the electrophilic metal center. The structures of these new gold(I) complexes have been studied by X-ray diffraction.
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Papers by Santiago Roberto Ulloa Lopez