8.下列何者在氫核磁共振光譜中的化學位移（ppm）最大？
(A)CH4
(B)C6 H6
(C)CH3 I
(D)CH2 Cl2

答案：登入後查看
統計： A(149), B(4379), C(373), D(1603), E(0) #1631418

詳解 (共 10 筆)

#2376045

帶陰電性的原子或基團，在δ 2~5 ppm共振

苯環的δ在7.27 ppm，如果取代基則7.27+X

175
1
#2843823

化學位移（ppm）小→大：

挽<   青   <春<兮<本<錢<算

烷<腈(炔)<醇<烯<苯<醛<酸


 

(A)烷類

(C)(D)有鹵素修飾，但還是烷類

因此選(B)苯

155
0
#2583107
這題應該是一個小陷阱
因為一般都會記陰電性越大
化學位移越大
苯環的位移剛好都比一些帶有極性的小分子大

所以選B

129
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#2593326
C6H6是苯環（芳香環）6~8.5 ...
(共 41 字，隱藏中）
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#3451166

Chemical Shift

烷<酮<炔<醚<烯<芳香(對<鄰<間)<醛<酸

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#3743965

18.在 102-1-%2525E8%252597%2525A5%2525E7%252589%2525A9%2525E5%252588%252586%2525E6%25259E%252590%2525E8%252588%252587%2525E7%252594%25259F%2525E8%252597%2525A5%2525E5%2525AD%2525B8%252528%2525E5%25258C%252585%2525E6%25258B%2525AC%2525E4%2525B8%2525AD%2525E8%252597%2525A5%2525E5%2525AD%2525B8%252529-18-1.png#s-104,141 的氫核磁共振光譜中，那個位置的氫核具有最大的化學位移？
(A)a
(B)b
(C)c
(D)d . 

編輯私有筆記及自訂標籤
答案：C 21 下列結構標示之碳核（13 C）何者在13 C NMR中的化學位移（ppm）最大？ 
 
(A)  98-2-%2525E8%252597%2525A5%2525E7%252589%2525A9%2525E5%252588%252586%2525E6%25259E%252590%2525E8%252588%252587%2525E7%252594%25259F%2525E8%252597%2525A5%2525E5%2525AD%2525B8%252528%2525E5%25258C%252585%2525E6%25258B%2525AC%2525E4%2525B8%2525AD%2525E8%252597%2525A5%2525E5%2525AD%2525B8%252529-21-1.png#s-331,183
 
(B)  98-2-%2525E8%252597%2525A5%2525E7%252589%2525A9%2525E5%252588%252586%2525E6%25259E%252590%2525E8%252588%252587%2525E7%252594%25259F%2525E8%252597%2525A5%2525E5%2525AD%2525B8%252528%2525E5%25258C%252585%2525E6%25258B%2525AC%2525E4%2525B8%2525AD%2525E8%252597%2525A5%2525E5%2525AD%2525B8%252529-21-2.png#s-321,183
 
(C)  98-2-%2525E8%252597%2525A5%2525E7%252589%2525A9%2525E5%252588%252586%2525E6%25259E%252590%2525E8%252588%252587%2525E7%252594%25259F%2525E8%252597%2525A5%2525E5%2525AD%2525B8%252528%2525E5%25258C%252585%2525E6%25258B%2525AC%2525E4%2525B8%2525AD%2525E8%252597%2525A5%2525E5%2525AD%2525B8%252529-21-3.png#s-348,173
 
(D) 98-2-%2525E8%252597%2525A5%2525E7%252589%2525A9%2525E5%252588%252586%2525E6%25259E%252590%2525E8%252588%252587%2525E7%252594%25259F%2525E8%252597%2525A5%2525E5%2525AD%2525B8%252528%2525E5%25258C%252585%2525E6%25258B%2525AC%2525E4%2525B8%2525AD%2525E8%252597%2525A5%2525E5%2525AD%2525B8%252529-21-4.png#s-360,197
.

編輯私有筆記及自訂標籤
答案：A
難度：適中
21. 在  101-2-%2525E8%252597%2525A5%2525E7%252589%2525A9%2525E5%252588%252586%2525E6%25259E%252590%2525E8%252588%252587%2525E7%252594%25259F%2525E8%252597%2525A5%2525E5%2525AD%2525B8%252528%2525E5%25258C%252585%2525E6%25258B%2525AC%2525E4%2525B8%2525AD%2525E8%252597%2525A5%2525E5%2525AD%2525B8%252529-21-1.png#s-107,157的氫核磁共振光譜中，那個位置的氫原子具有最大的化學位移？
(A)a
(B)b
(C)c
(D)d . 
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#4078717
...



(共 2 字，隱藏中）
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18
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#2572247

看不太懂....求其他解

12
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#4497115

25.下列何種官能基的訊號在氫核磁共振譜中看不到？
(A)酮基
(B)醛基
(C)甲氧基
(D) 乙醯基

專技 - 藥物分析與生藥學(包括中藥學)- 107 年 - 107-2 專技 藥物分析與生藥學(含中藥學)#70390

樓上說的題目


詳解:酮基沒有H
 

10
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#4941823

各種H在苯環上的鄰間對^_^

60fd2d4455edb.jpg

60fd2d6371a2e.jpg

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私人筆記 (共 1 筆)

私人筆記#5637025
未解鎖
改編前人口訣：H譜化學位移1晚(烷1) ...
(共 103 字，隱藏中）
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