Repositori URV

Identifier: TDX:923

Handle: https://hdl.handle.net/20.500.11797/TDX923

Authors:
Campos Carrasco, Ariadna

Abstract:
The Thesis is divided in two parts, in the first part is described the use of carbon dioxide as green solvent in dicationic and cationic palladium catalysed CO/vinyl arenes copolymerisation comparing the catalytic activity with conventional media (2,2,2-trifluoroethanol). The initiation and termination mechanism of the copolymerisation reaction was studied by MALDI-TOF analysis of the copolymers. The coordination chemistry of the bidentate P,N hybrid ligand 2-(2’-pyridyl)-4,6-diphenylphosphinine (L4) towards Pd(II), Pt(II) and Rh(I) was investigated. Both Pd(II) and Pt(II) complexes reacted with (chiral) alcohols and (chiral) amines at the P=C double bond at elevated temperature, leading to the corresponding products [MCl2[L4H•XR] (XR = OR or NR1R2). In the second part is described the use of carbon dioxide as C1 building block in zinc (II) catalysed CO2/epoxides copolymerisation. The effect in the productivity and polycarbonate selectivity of the different amino-alcohol substituents were studied. Moreover, new zinc (II) Schiff base complexes were synthesized; characterized and preliminary catalytic studies were obtained.