孟令芝有机波谱分析第三版课后习题及答案.doc
第二章 质谱习题及答案 解：A、C2H3Cl，B、C2H6S分子离子峰为偶数表明含有偶数个氮或不含氮。CxHyNzOwSS不含氮 含氮 A、，设z=1，则x=4.02，C4N分子量62，不合理。所以无氮元素。同理B，设z=1，则x=3.11，C3N分子量62，不合理。所以无氮元素。同位素相对丰度表，p26表2.3。对于A，RI相对丰度，M：(M+2)=3:1，则A中有氯原子，推断其分子式为CH2=CHCl对于A，RI相对丰度，M：(M+2)=25:1，则A中有硫原子，推断其分子式CH3CH2SH 解：C2H2Cl2，ClCH=CHClm/z=98分子离子峰，M：(M+2)=6:1，有两个氯。同位素相对丰度表，p26表2.3。M-35=98-Cl，M-36=98-HCl，M-37=98-HCl-H解：m/z 142=M-43(×C3H7)，m/z 142=C9H20N，(n-C4H9)3N,分子离子峰为奇数表明含有奇数个氮。CxHyNzOwSS，设z=1，则x=8.75，若z=3，则x=8.08，不合理。M：(M+1)=10:1，表明不含有卤素和氧硫。m/z 44=CH2=N+HCH3，m/z 100=142-42(C3H6)m/z 57=M-43(×C3H7)，m/z 44=57-13(CH3)，CH2=N+HCH3，第四章 红外课后习题及答案 间、邻、对硝基甲苯第三章 紫外习题及答案 Acknowledgements My deepest gratitude goes first and foremost to Professor aaa , my supervisor, for her constant encouragement and guidance. She has walked me through all the stages of the writing of this thesis. Without her consistent and illuminating instruction, this thesis could not havereached its present form. Second, I would like to express my heartfelt gratitude to Professor aaa, who led me into the world of translation. I am also greatly indebted to the professors and teachers at the Department of English: Professor dddd, Professor ssss, who have instructed and helped me a lot in the past two years. Last my thanks would go to my beloved family for their loving considerations and great confidence in me all through these years. I also owe my sincere gratitude to my friends and my fellow classmates who gave me their help and time in listening to me and helping me work out my problems during the difficult course of the thesis. My deepest gratitude goes first and foremost to Professor aaa , my supervisor, for her constant encouragement and guidance. She has walked me through all the stages of the writing of this thesis. Without her consistent and illuminating instruction, this thesis could not havereached its present form. Second, I would like to express my heartfelt gratitude to Professor aaa, who led me into the world of translation. I am also greatly indebted to the professors and teachers at the Department of English: Professor dddd, Professor ssss, who have instructed and helped me a lot in the past two years. Last my thanks would go to my beloved family for their loving considerations and great confidence in me all through these years. I also owe my sincere gratitude to my friends and my fellow classmates who gave me their help and time in listening to me and helping me work out my problems during the difficult course of the thesis.
