These compounds are used to promote high selectivity of oxidation of ketones to lactones or esters in the Baeyer-Villiger oxidation.
The change in enthalpy for a certain type of reaction involving these compounds is dependent on their reactance by the Drago equation. Mukaiyama found that these compounds can promote the formation of aldols from acetals and silyl enol ethers. These compounds are used to promote high selectivity of oxidation of ketones to lactones or esters in the Baeyer-Villiger oxidation. They are necessary to remove the chlorine atom from an alkyl or acyl halide in the first step of the Friedel-Crafts reactions. For 10 points, name these compounds that include tin tetrachloride and boron trifluoride, which act as electron pair acceptors in their namesake American chemist's acid-base theory.
The change in enthalpy for a certain type of reaction involving these compounds is dependent on their reactance by the Drago equation.
Lewis acids [or Lewis bases until "aldols"; prompt on Lewis; prompt on acids]