Synthesis and behavior of novel sulfonated water-soluble N-heterocyclic carbene (η4-diene) platinum(0) complexes

A series of water-soluble (NHC)Pt(0)(dvtms) and (NHC)Pt(0)(AE) complexes containing different sulfonated NHC ligands (dvtms = divinyltetramethyldisiloxane and AE = diallyl ether) are reported. The dvtms compounds have been found to be quite robust and to display some conformational rigidity, whereas their AE counterparts are less stable and more flexible. The catalytic evaluation of these complexes in the hydrosilylation of alkynes in water revealed no benefits in favor of the complexes containing the more labile spectator diene (AE), and a fairly regular catalytic behavior for all complexes that restricts the location of the sulfonate group to the proximity of the metal site.Fil: Ruiz Varilla, Andrea M.. Universidad de Alcala. Facultad de Ciencias; EspañaFil: Baquero, Edwin A.. Universidad de Alcala. Facultad de Ciencias; EspañaFil: Silbestri, Gustavo Fabián. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Bahía Blanca. Instituto de Química del Sur; ArgentinaFil: Gonzalez Arellano, Camino. Universidad de Alcala. Facultad de Ciencias; EspañaFil: de Jesús, Ernesto. Universidad de Alcala. Facultad de Ciencias; EspañaFil: Flores, Juan C.. Universidad de Alcala. Facultad de Ciencias; Españ