Abstract:
ZnF2, CdF2, and CUF2 have been adsorbed onto the surface
of montmorillonite K10, and the infrared and 19F, 27 AI, and 29Si MAS
NMR spectra of the reagents over a range of loadings have been
obtained. CUF2 was observed to attack the Si02 layer and form the
complex CuSiF6, Zn F2 tends to attack the aluminium oxide layer, in
which Zn isomorphously replaces AI, and forms AIF3 and AIF4 -
complexes. All the spectroscopic evidence ruled out the formation
of any AI-F and/or Si-F free species as CdF2 is adsorbed on the
surface of montmorillonite K10. The reactivity of MF2-K10 reagents
towards Friedel-Crafts benzylation of benzene with benzyl chloride
varied from one reagent to another. ZnF2-K10 was observed to be
the most reactive and CUF2 was the least reactive.
