1NMR-4の問いの回答例
カルボンのカーボン多重度の区別
δ(ppm) | 分類
|
---|
199.4 | C
|
146.5 | C
|
144.4 | CH
|
135.2 | C
|
110.3 | CH2
|
42.9 | CH2
|
42.3 | CH
|
31.0 | CH2
|
20.3 | CH3
|
15.5 | CH3
|
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多置換ベンゼンのカーボンケミカルシフト計算
o-クレゾール
- C1
- (基準値)+(-OHのZ1)+(-CH3のZ2)
=128.5+26.9+0.6=156.0 (ppm)
- C2
- (基準値)+(-OHのZ2)+(-CH3のZ1)
=128.5-12.7+9.3=125.1 (ppm)
- C3
- (基準値)+(-OHのZ3)+(-CH3のZ2)
=128.5+1.4+0.6=130.5 (ppm)
- C4
- (基準値)+(-OHのZ4)+(-CH3のZ3)
=128.5-7.3+0.0=121.2 (ppm)
- C5
- (基準値)+(-OHのZ3)+(-CH3のZ4)
=128.5+1.4-3.1=126.8 (ppm)
- C6
- (基準値)+(-OHのZ2)+(-CH3のZ3)
=128.5-12.7+0.0=115.8 (ppm)
m-クレゾール
- C1
- (基準値)+(-OHのZ1)+(-CH3のZ3)
=128.5+26.9+0.0=155.4 (ppm)
- C2
- (基準値)+(-OHのZ2)+(-CH3のZ2)
=128.5-12.7+0.6=116.4 (ppm)
- C3
- (基準値)+(-OHのZ3)+(-CH3のZ1)
=128.5+1.4+9.3=139.2 (ppm)
- C4
- (基準値)+(-OHのZ4)+(-CH3のZ2)
=128.5-7.3+0.6=121.8 (ppm)
- C5
- (基準値)+(-OHのZ3)+(-CH3のZ3)
=128.5+1.4+0.0=129.9 (ppm)
- C6
- (基準値)+(-OHのZ2)+(-CH3のZ4)
=128.5-12.7-3.1=112.7 (ppm)
p-クレゾール
- C1
- (基準値)+(-OHのZ1)+(-CH3のZ4)
=128.5+26.9-3.1=152.3 (ppm)
- C2, C6
- (基準値)+(-OHのZ2)+(-CH3のZ3)
=128.5-12.7+0.0=115.8 (ppm)
- C3, C5
- (基準値)+(-OHのZ3)+(-CH3のZ2)
=128.5+1.4+0.6=130.5 (ppm)
- C4
- (基準値)+(-OHのZ4)+(-CH3のZ1)
=128.5-7.3+9.3=130.5 (ppm)
バニリン
- C1
- (基準値)+(-CHOのZ1)+(-OCH3のZ3)+(-OHのZ4)
=128.5+9.0+0.9-7.3=131.1 (ppm)
- C2
- (基準値)+(-CHOのZ2)+(-OCH3のZ2)+(-OHのZ3)
=128.5+1.2-14.7+1.4=116.4 (ppm)
- C3
- (基準値)+(-CHOのZ3)+(-OCH3のZ1)+(-OHのZ2)
=128.5+1.2+30.2-12.7=147.2 (ppm)
- C4
- (基準値)+(-CHOのZ4)+(-OCH3のZ2)+(-OHのZ1)
=128.5+6.0-14.7+26.9=146.7 (ppm)
- C5
- (基準値)+(-CHOのZ3)+(-OCH3のZ3)+(-OHのZ2)
=128.5+1.2+0.9-12.7=117.9 (ppm)
- C6
- (基準値)+(-CHOのZ2)+(-OCH3のZ4)+(-OHのZ3)
=128.5+1.2-8.1+1.4=123.0 (ppm)
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