Abstract
The isomerization of methylcyclopropane on several metal phosphates including AlPO4, Zr(HPO4)2, Ti(HPO4)2, Ca3(PO4)2, and Ni3(PO4)2 was examined. Only n-butenes were formed as products; neither cyclobutane nor isobutene was detected. The composition of n-butenes was essentially independent of the extent of conversion but altered depending on the kind of phosphates. On the basis of product distributions, proton addition mechanism (Brønsted site) is presented for the isomerization of methylcyclopropane.
