1H and 13C NMR data (CDCl3) and 1H/13C correlations of compounds 4 and 5 (δ in ppm, J in Hz).Dilfaraz, Khan
4.0398ppm 1.9609ppm 1.1785ppm 13C NMR Spectrum170.939 77.3841 77.0658 76.7469 60.2345 20.8632 14.0665 试推测其化学构造。相关知识点: 试题来源: 解析 答:计算出不饱和度为1。2应该是亚甲基,两个3应该是甲基。甲基裂坡成了三重坡,亚甲基裂坡成了四重坡,说明这边刚好是个乙基。在210左右有个吸收峰,这是...
百度试题 题目CDCl3在1HNMR谱中溶剂峰和水峰的化学位移分别为 A. 7.27ppm,3.3ppm B. 7.27ppm, 1.55ppm C. 2.05ppm, 2.84ppm D. 2.5ppm,3.3ppm 相关知识点: 试题来源: 解析 B.7.27ppm, 1.55ppm 反馈 收藏
45-46AdegC); IR (max, cm-1) KBr disc: 2951 (=C-H), 1694 (C=O), 685 (C-Br); 1H NMR (500 MHz, CDCl3, I' in ppm): 4.46 (2H, s, CH2), 7.49 (2H, t, J = 7.4 Hz, H3'), 7.61 (1H, dd, J = 7.4,1.5 Hz, H4'), 7.98 (2H, dd, J = 7.4, 1.5 Hz, H2'); ...
是个异常峰…一般在这个位置出现的峰会是什么官能团啊 @wyy080214发自小木虫IOS客户端 ...
没有图,只有数据,求详细解析1HNMR (CDCl3, ? inppm): 8.98 (d, 2 H, J )2.2Hz), 8.79 (dd, 4 H), 8.15 (t, 1 H, J ) 2.2Hz), 7.60 (dd, 4 H,J1 ) 2.8Hz, J2 ) 1.7Hz).13CNMR (CDCl3, ? inppm): 151.7,148.4,144.7, ... 分享回复赞 南京名思教育吧 爱叨叨的开琴 初中...
4.0398ppm 1.9609ppm 1.1785ppm 13C NMR Spectrum170.939 77.3841 77.0658 76.7469 60.2345 20.8632 14.0665 试推想其化学构造.相关知识点: 试题来源: 解析 答:盘算出不饱和度为1.2应当是亚甲基,两个3应当是甲基.甲基裂坡成了三重坡,亚甲基裂坡成了四重坡,解释这边刚好是个乙基.在210阁下有个接收峰,这是典范的...
1H and 13C NMR data and important HMBC correlations of compound 3 (CDCl3, δ in ppm, J in Hz).Dilfaraz, Khan
百度试题 结果1 题目CDCl3在1HNMR谱中溶剂峰和水峰的化学位移分别为 B A. 7.27ppm,3.3ppm B. 7.27ppm, 1.55ppm C. 2.05ppm, 2.84ppm D. 2.5ppm,3.3ppm 相关知识点: 试题来源: 解析 B 反馈 收藏
The Deltadelta(1H) values do not exceed one ppm; Deltadelta(13C) ranges from - 1 to 6 ppm. Various complexation modes have been proved by electronic absorption spectroscopy in the visible region (VIS). For comparison purposes, some adducts of pyridine, thiophene and furan derivatives have ...