CHEMOSELECTIVE HOMOGENEOUS HYDROGENATION OF PHENYLACETYLENE USING THIOSEMICARBAZONE AND THIOBENZOYLHYDRAZONE PALLADIUM(II) COMPLEXES AS CATALYSTS

Citation
P. Pelagatti et al., CHEMOSELECTIVE HOMOGENEOUS HYDROGENATION OF PHENYLACETYLENE USING THIOSEMICARBAZONE AND THIOBENZOYLHYDRAZONE PALLADIUM(II) COMPLEXES AS CATALYSTS, Journal of the Chemical Society. Dalton transactions, (16), 1998, pp. 2715-2721
Citations number
47
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Chemistry Inorganic & Nuclear
ISSN journal
0300-9246
Issue
16
Year of publication
1998
Pages
2715 - 2721
Database
ISI
SICI code
0300-9246(1998):16<2715:CHHOPU>2.0.ZU;2-9
Abstract
A series of monometallic palladium(II) complexes with thiosemicarbazon es and thiobenzoylhydrazones has been synthesized and characterised by spectroscopic methods. The crystal structures of chloro(phenyl 2-pyri dyl ketone thiosemicarbazonato)palladium(II) 1a and chloro(phenyl 2-py ridyl ketone thiobenzoylhydrazonato)palladium(II) 2 were also determin ed. The catalytic activity of the complexes in the homogeneous hydroge nation of phenylacetylene was tested with particular regard to the che moselectivity from a triple to a double bond. Using chlorocomplexes a high chemoselectivity was always observed. Results of a kinetic study of the hydrogenation of phenylacetylene in the presence of chloro(meth yl 2-pyridyl ketone thiosemicarbazonato)palladium(II) 3 as catalyst pr ovided suggestions for the elucidation of the catalytic cycle of the r eaction.