the benzene molecule In some cases. such as the benzene molecule. the circulation of the electrons in the aromatic orbitals creates a magnetic field at the hydrogen nuclei which enhances the b. field This phenomenon is B called deshielding. In this example, the b. field is applied perpendicular to the plane of the molecule. The ring current is traveling clockwise if you look down at the plane THNMR YAN
In some cases, such as the benzene molecule, the circulation of the electrons in the aromatic orbitals creates a magnetic field at the hydrogen nuclei which enhances the Bo field. This phenomenon is called deshielding. In this example, the Bo field is applied perpendicular to the plane of the molecule. The ring current is traveling clockwise if you look down at the plane. the benzene molecule THNMR YAN
B.环状共轭体系的环电流效应 Cyclohexane -CDCl3 CH 12 6432 Benzene-CDCI THMMR
THNMR YAN B. 环状共轭体系的环电流效应 C6H12 C6H6
B.环状共轭体系的环电流效应 Toluene- CDCI CHCH 687654326 Ethyl benzene-CDCl3 C6HS CH2CH 5432 THMMR
THNMR YAN B. 环状共轭体系的环电流效应 C6H5CH3 C6H5CH2CH3
B.环状共轭体系的环电流效应 uridine CDCl3 H-c C-H H-C C-H THMMR
THNMR YAN B. 环状共轭体系的环电流效应
C.相连键的磁各向异性 CH3(C=OCH2CH3 CH3 in cdcl3 CH3 CH2 TMS 2 D.相连碳原子的s亲化 E.溶剂、氢键 ■■■■■■ F.活拨氢 THMMR
THNMR YAN C. 相连键的磁各向异性 D. 相连碳原子的s-p杂化 E. 溶剂、氢键 …… F. 活泼氢