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Which one of these species involved in a chemical reaction has the shortest time of existence?​...

Which one of these species involved in a chemical reaction has the shortest time of existence?​

A. reactants

B. transition states

C. intermediates

D. products

Science   Chemistry   
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Answer #1

Answer: C intermediates

An intermediate is a short-lived unstable molecule in a reaction. It shows a slight reduction in energy on the reaction coordinate.
A transition state is the transition to a new molecule. It has everything it needs to be the new molecule and is the highest point on the reaction coordinate.

An intermediate would be something like a carbocation, and a transition state would be the 5-membered carbon complex that forms in an SN2 reaction.

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