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105年 - 105 學士後西醫：有機化學#78642
> 試題詳解
28. Which of the following would not produce nuclear magnetic resonance?
(A)
2
H
(B)
14
N
(C)
16
O
(D)
19
F
(E)
11
B
答案：
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統計：
A(4), B(1), C(43), D(1), E(1) #2053825
私人筆記 (共 1 筆)
台中孔乙己
2021/04/07
私人筆記#2956383
未解鎖
不能用在NMR:質子數與中子數皆為偶數者...
(共 21 字，隱藏中）
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29. Which compounds have 3 signals in the 13C NMR spectrum? (A) I, II (B) III, IV (C) I, II, III (D) I, III, IV (E) I, II, III, IV
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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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