Browsing Departament de Química by Title

Now showing items 140-143 of 143

Theoretical study of water oxidation and reduction mechanisms by aminopyridine first row transition metal catalysts

Acuña-Parés, Ferran (Date of defense: 2016-07-20)

One of the major current scientific goals is the development of renewable energy sources. An effective alternative to fossil fuels consists in the conversion of the sunlight energy into chemical fuels. The molecular hydrogen ...

Transition metal-catalysed [2+2+2] cycloaddition reactions. Methodology and mechanism

Parera Briansó, Magda (Date of defense: 2014-05-20)

The transition-metal catalysed [2+2+2] cycloaddition reaction is a highly efficient synthetic tool that allows six-membered polysubstituted carbo- and heterocyclic derivatives to be obtained in an atom economy process. ...

Understanding C-H oxidation and amination reactions performed by late first-row transition metals: trapping high-valent metal-O/N species

Corona Prieto, Teresa (Date of defense: 2017-02-17)

The transformation of C-H bonds into C-O/N bonds is a process of interest in organic synthesis, but controlling the reactivity and selectivity among the multiple C-H bonds existing in most molecules is a challenging task. ...

Utilització de suports polimèrics en processos de separació de metalls valuosos. Aplicacions hidrometal.lúrgiques i analítiques

Iglesias Juncà, Mònica (Date of defense: 2000-03-03)

The present study focuses on the characterization of solid-liquid extraction techniques for the separation and preconcentration of rare-earth elements and precious metals. We developed an impregnated resin with di ...