For 10 points, name these temporary states in a reaction that correspond to the activation energy.
The vibrational partition function can be used to characterize these entities as "loose." Analogs of these entities are useful enzyme inhibitors because they bind to the target enzymes more tightly than the enzyme's natural substrate. They correspond to (*) saddle points on potential energy surfaces. For an SN2 reaction, this entity is trigonal bipyramidal. They more closely resemble the species they are closest to in energy according to Hammond's postulate. For 10 points, name these temporary states in a reaction that correspond to the activation energy.
The vibrational partition function can be used to characterize these entities as "loose."
transition state