79. Using a 400 MHz 1H NMR instrument, if a hydrogen atom shows a quartet at δ = 4.06, 4.03, 4.00, 3.97 ppm, please calculate it's coupling constant. And where will this triplet peak shows up at a 600 MHz H NMR instrument?
(A) 12 Hz; δ: 4.035, 4.015, 3.995, 3.975 ppm
(B) 12 Hz; δ: 4.045, 4.025, 4.005, 3.985 ppm
(C) 12 Hz; δ: 4.025, 4.005, 3.985, 3.965 ppm
(D) 6 Hz; δ: 4.045, 4.025, 4.005, 3.985 ppm
(E) 6 Hz; δ: 4.035, 4.015, 3.995, 3.975 ppm

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統計: A(1), B(3), C(0), D(0), E(0) #3421274

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