有机化合物波谱解析课件 综合练习题及答案_第1套.pdfVIP

SPECTRUM ELUCIDATION HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY Comprehensive Exercises 1 Try to do the exercises by yourself, then go to the answers and think why. Problem 1. Which spectrum provides the information of structure? (1) Relative Molecular mass (2) conjugation (3) functions groups (4) proton chemical surrounding Answer (1)MS (2)UV 1 (3)IR (4) H NMR Problem 2. In the solution of methanol, the absorption maximum is at 284nm. Which is the structure of the compound, A or B? CH3 H C 3 O O O O H C H C 3 3 OH OH A B Answer A Problem 3. For each of the following pairs of compounds, indentify which has the longer λ ? max CH3 CH2 and (1) O O NH2 (2) and (3) CH CH CH and CH3CH CHOCH3 3 2 Answer (1) CH2 (2) NH2 O (3) CH CH CHOCH 3 3 Problem 4. An IR spectrum of compound has been given in the following figure? 1 / 6 SPECTRUM ELUCIDATION HEBEI UNIVERSITY