New Method of Determining Acid Base Strength Distribution and a New Acidity-Basicity Scale for Solid Catalysts: The Strongest Point, H (sub O)

摘要

The use of the strongest H (sub 0) as an acid-base scale is illustrated. It is concluded that the catalytic activity arises from carbonium ions for solid catalysts whose strongest point values are less than 2, from carbanions for solid catalysts whose strongest point values are larger than 10, and from both acid and base points for those which have the H (sub 0) value of 4 to 8. Further, from correlation between selectivity of o-isopropyl compounds and their strongest point H (sub 0), it was found that the ortho selectivity increased as the basicity of the solid surface increased.