Preorganization · How a Rigid Cavity Pays the Entropy Bill Before Binding
unseel.com · spherand vs podand · Cram 1987
guest Li⁺
Kₐ ratio
−TΔS°
step
rigid spherand (preorganized)
flexible podand (disordered)
guest cation Li⁺/Na⁺
converging O lone pairs
Unseel.com · Preorganization Unseel.com · Preorganization Principle — Concepts