2. What is the coupling constant (J value) between Ha and Hb in the following compound?
(A) 0~5 Hz
(B) 6~12 Hz
(C) 11~18 Hz
(D) 20~25 Hz
(E) None of the above
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統計: A(3), B(9), C(30), D(2), E(6) #937531
統計: A(3), B(9), C(30), D(2), E(6) #937531