Title: Lanthanide(III) complexes of aromatic sulfonic acids as catalysts for the nitration of toluene
Authors: Parac-Vogt, Tatjana ×
Deleersnyder, Karen
Binnemans, Koen #
Issue Date: 2004
Publisher: Elsevier science sa
Series Title: Journal of alloys and compounds vol:374 issue:1-2 pages:46-49
Abstract: Ytterbium(III) complexes of benzenesulfonic acid, Yb(BSA)3,p-toluenesulfonic acid, Yb(Tos)3, and 2-naphthalenesulfonic acid, Yb(NSA)3, were prepared and tested as possible catalyst for the nitration of toluene. With a loading of 5-10 mol% of Yb(BSA)3 and Yb(NSA)3, a quantitative conversion of toluene to nitrotoluene was achieved within 5 h, while Yb(Tos)3 was slightly less active and 77% of nitrated products were obtained. The catalysts can be easily recovered after the reaction, and 1H NMR spectroscopy of analogous diamagnetic lanthanide(III) catalysts showed that the recovered catalysts were identical to the freshly prepared ones. The ratio of ortho:meta:para products was in all reactions 52:6:42, which is consistent with a direct electrophilic attack by the nitronium ion, NO2+.
ISSN: 0925-8388
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Molecular Design and Synthesis
× corresponding author
# (joint) last author

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