Answer the follow using the Energy Profile plot. More than one answer is possible for some questions.

What chemical species are present...

A. at the longest constraint distance? (Use i, ii, iv, etc. for your answer)

B. at the highest energy? (Use i, ii, iv, etc. for your answer)

C. at the shortest constraint distance? (Use i, ii, iv, etc. for your answer)

To answer these questions using the Energy Profile plot, you need to analyze the graph and identify the corresponding chemical species at specific points.

A. To determine the chemical species present at the longest constraint distance, you need to identify the point on the Energy Profile plot where the distance between the interacting species is the greatest. Look for the point that represents the largest distance between the species. Then, refer to the labels or legend on the plot to determine the corresponding chemical species. For example, if the point corresponds to species i, then your answer would be i.

B. To identify the chemical species at the highest energy, you need to look for the point on the Energy Profile plot that represents the maximum energy value. Look for the peak or highest point on the graph and find the corresponding label or legend on the plot to determine the chemical species. If the highest energy point corresponds to species iv, then your answer would be iv.

C. Similarly, to find the chemical species at the shortest constraint distance, you need to locate the point on the Energy Profile plot where the distance between the interacting species is the smallest. Identify the point that represents the shortest distance and refer to the labels or legend to identify the corresponding chemical species. If the shortest constraint distance corresponds to species ii, then your answer would be ii.

Remember, the specific chemical species present at different points on the Energy Profile plot may vary depending on the context and the specific graph you are analyzing.