When steric hindrance prevents a mixture of compounds named for this scientist from combining classically, the mixture is referred to as his namesake (*) "frustrated pair".
One method of experimentally testing a property named for this scientist uses a T-E-P-O probe and analyses the system with phosphorus-31 NMR spectroscopy. The enthalpy change in a reaction involving two compounds named for this scientist can be calculated with the Drago-Wayland equation. When steric hindrance prevents a mixture of compounds named for this scientist from combining classically, the mixture is referred to as his namesake (*) "frustrated pair". One type of compound named for this scientist mediates the Mukaiyama aldol addition, and those compounds named for this scientist also typically catalyze EAS reactions. Boron trifluoride and aluminum trichloride are examples of his namesake "acids". For 10 points, name this American scientist who defined acids as electron pair acceptors. 
One method of experimentally testing a property named for this scientist uses a T-E-P-O probe and analyses the system with phosphorus-31 NMR spectroscopy.
Gilbert Newton Lewis [accept Lewis Acids or Lewis Bases] (The technique in clue one is the Gutmann-Beckett method/procedure