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30. Using a 300 MHz 1 H NMR instrument, if a H shows a triplet at δ 4.02, 4.00, 3.98 ppm, please calculate it’s coupling constant. And where will this triplet peak shows up at a 600 MHz 1 H NMR instrument?
(A) 6 Hz; δ: 4.01, 4.00, 3.99 ppm
(B) 6 Hz;δ: 4.02, 4.00, 3.98 ppm
(C) 6 Hz; δ: δ: 4.00, 3.98, 3.96 ppm
(D) 2 Hz; δ: 4.02, 4.00, 3.98 ppm
(E) 2 Hz; δ: 4.00, 3.98, 3.96 ppm.
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統計： A(17), B(6), C(2), D(2), E(3) #2053827
統計： A(17), B(6), C(2), D(2), E(3) #2053827
