Question

The Hammond postulate describes the relationship between the energy of the transition state and the product distribution in a reaction that is capable of following more than one pathway.
1. Fill in the blanks with the appropriate options given in below:
The Hammond postulate states that reactions which are thermodynamically endothermic and kinetically ___________ have transitions states that occur ___________ in the reacton time frame, and resemble the ___________ in terms of energy and structure.
Options:
a. slow
b. fast
c. late
d. early
e. products
f. reactants

Answer 1

Answer: slow, late, products

Explanation:

Hammond's postulate in physical organic chemistry helps to rationalize the transition states of species. For endothermic reactions, the transition states look more like the products in structure. Hence endothermic reactions which are kinetically slow have transition states which occur late in the reaction and resemble the products more closely.

Answer 2

The Hammond postulate states that reactions which are thermodynamically endothermic and kinetically slow have transitions states that occur late in the reaction time frame, and resemble the products in terms of energy and structure.

Hammond's postulate:

It helps to rationalize the transition states of species. For endothermic reactions, the transition states look more like the products in structure. Hence, endothermic reactions which are kinetically slow have transition states which occur late in the reaction and resemble the products more closely.

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