4 research outputs found
A polystyrene-supported tin trichloride catalyst with a C11-spacer. Catalysis monitoring using high-resolution magic angle spinning NMR
A
Synthesis, Characterization and Transesterification Activity of Cross-Linked Styrenic Resins Containing the Triphenyltincarboxylate Moiety Spaced by a Dimethylene from the Aromatic Ring
An organotin monomer, triphenyltin 3-(4-styryl)-
propionate (TPTSPr) has been synthesized and
copolymerized in different ratios with styrene and 1,4-divinylbenzene
in order to obtain resins with catalytic activity in
transesterification reactions. The resins and a low molecular
weight model compound, triphenyltin 3-(4-ethylphenyl)-
propionate (TPT-C2-Pr), mimicking the catalytic co-unit,
have been characterized by FT-IR and NMR spectroscopy,
with particular attention paid to the coordination at tin and
how it correlates to the catalytic activity. The activity of both
the resins and of the model compound have been tested in a
transesterification model reaction between ethyl acetate and
primary alcohol. All the resins show catalytic activity that
decreases with increasing content of the active co-unit in the
resins, owing to the interaction of the active sites among
themselves