[問題]有機光譜(關務考題)
大家好
想請問兩題光譜問題 (關務三等 98 年第九大題),題目如下:
化合物 A: IR 光譜於 1830 cm-1 有強吸收訊號; 1H-NMR (CDCl3) 光譜僅於
δ7.34 有一寬的單峰訊號。且質譜圖顯示 m/z:138 (M+ +2, 0.8%),
137 (M+ +1, 6.1%),136 (M+, 75.5%), 92 (56.5%), 64 (100%), 63 (48%)。
化合物B:IR 光譜於1680 cm-1 有強吸收訊號;質譜圖中信號相對強度高於10% 僅有
m/z:182 (M+, 55%), 105 (100%), 77 (62%) 及 51 (19%);且此物與
2, 4-二硝基苯肼(2,4-dinitrophenylhydrazine,2, 4-DNP)產生橘黃色沈澱。
這兩題我一直解不出來
想請大家幫忙
感激不盡
謝謝
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