Tennis Balls and Softballs Self-Complementary Assemblies

1 Tennis Balls and Softballs Self-Complementary Assemblies 

X-ray crystallography - which reveals a total of eight hydrogen bonds of N-2.78-2.89 A. 

It is interesting to speculate on the origins of the (stoichiometric) rate enhancement of these reactions inside the softball cavity. In more conventional forms of catalysis, such as reactions occurring at transition metal centres, the mode of catalysis often involves a significant statistical effect. The reactants are brought into close proximity to one another by simultaneous coordination to the metal. This increases 

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