2002年诺贝尔化学奖的一半奖金授予了瑞士科学家库尔特维特里希,以表彰他“发明了利用核磁共振技术测定溶
(1)分子式C 4 H 8 的同分异构体有CH 3 CH 2 CH=CH 2 、CH 3 CH=CHCH 3 、CH 2 =C(CH 3 ) 2 等,还有环丁烷、甲基环内烷等环烷烃。符合“两种氢原子(两个峰)”、“两类氢原子为3:1(共面积之比为3:1)”这两项条件的只有CH 3 CH=CHCH 3 、CH 2 =C(CH 3 ) 2 。
(2)作打火机燃料是正丁烷,正丁烷分有两类氢原子,个数比为3:2。所以答案为:3:2,CH 3 CH 2 CH 2 CH 3 ;9:1,CH 3 CH(CH 3 ) 2 。
题示信息“乙醚分子中有两种氢原子,其HNMR谱中有两个共振峰,两个共振峰的面积比为3:2,而乙醇分子中有三种氢,HNMR谱中有三个峰,三个共振峰之间的面积比为3:2:1”中可得出两个结论:一是有机分子中氢原子和种类数跟HNMR中共振峰个数相等;二是共振峰的面积比机分子中各类氢原子个数有关,如乙醚分子(CH 3 CH 2 OCH 2 CH 3 )中,两类氢原子的个数比为3:2,所以两个共振峰的面积之比为3:2。
2002年诺贝尔化学奖
2002 ; 29 ( 6) 生物化学与生物物理进展 Prog. Biochem. Biophys.?9 7 3 ?生物大分子质谱电离技术的突破及 核磁共振三维结构测定方法的建立―― ― 2002 年诺贝尔化学奖简介黄仁槐 33( 中国科学院生物物理研究所 ,分子生物学研究中心 ,北京 100101)?9 7 4 ?生物化学与生物物理进展 Prog. Biochem. Biophys. 2002 ; 29 ( 6)2002 ; 29 ( 6) 生物化学与生物物理进展 Prog. Biochem. Biophys.?9 7 5 ??9 7 6 ?生物化学与生物物理进展 Prog. Biochem. Biophys. 2002 ; 29 ( 6)Mass Spectrometry ( MS) and Nuclear Magnetic Resonance( NM R) Revolutionized The Study of Biological MacromoleculesHUAN G Ren - Huai 3( Center f or Molecular Biology , I nstit ute of Biophysics , The Chi nese Academy of Sciences , Beiji ng 100101 , China)Abstract The progress of science is in part att ributed to t he development of new met hodologies. The application of mass spect romet ry ( MS ) and nuclear magnetic resonance ( NMR ) in t he st udy of biological macromolecules is such a representative example , which is t he subject of t his year ' Nobel prize award in s chemist ry shared by t hree scientist s. The works include t he development of soft desorption ionization met hods for mass spect romet ric analysis of biological macromolecules and t he development of NMR for determining t he t hree - dimensional st ruct ure of biological macromolecules in solution. These development s revolutionized t he analytical met hods for biomolecules such as proteins and facilitate t he st udy of biological macromolecules so much enough to have deep effect s on t he whole life sciences.Key words nobel prize , nuclear magnetic resonance , elect rospray , soft laser desorption 3 Corresponding aut hor. Tel : 86210264888548 , E2mail :huangrh @moon. ibp . ac. cn Received : November 20 , 2002 Accepted : November 26 , 2002
2002年诺贝尔化学奖 2002年诺贝尔化学奖简介