A 1 M solution of TEMPO in chloroform at room temperature shows broader EPR spectrum than that of a 1 mM solution. Which sentence describes this phenomenon most accurately?(See page: tw6ce) A) in the more concentrated solution, the lines are broadened due to the dipole-dipole interaction between the TEMPO molecules B) in the more concentrated solution, the lines are broadened by the slow tumbling of TEMPO molecules C) in the more concentrated solution, the lines are broadened due to the exchange interaction between the TEMPO molecules D) in the more concentrated solution, the lines are broadened by the hyperfine interaction between the TEMPO molecules

Chemistry

Question
A 1 M solution of TEMPO in chloroform at room temperature shows broader EPR spectrum than that of a 1 mM solution. Which sentence describes this phenomenon most accurately?(See page: tw6ce)
A) in the more concentrated solution, the lines are broadened due to the dipole-dipole interaction between the TEMPO molecules
B) in the more concentrated solution, the lines are broadened by the slow tumbling of TEMPO molecules
C) in the more concentrated solution, the lines are broadened due to the exchange interaction between the TEMPO molecules
D) in the more concentrated solution, the lines are broadened by the hyperfine interaction between the TEMPO molecules
Answer

B) in the more concentrated solution, the lines are broadened by the slow tumbling of TEMPO molecules

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