¹H NMR Correlation


 

Group	PPM	Rationale
A	1.1159 (s)	These hydrogen atoms are attached to sp3-hybridized carbon atoms linked to another carbon atom.
B	1.2641-1.4158 (m)	These hydrogen atoms are bonded to an sp3-hybridized carbon atom, and have one neighbor.  Since they are also diastereotopic, they split each other.
H2O	1.5327 (s)	This is a water impurity in the solvent system.
C	2.9855-2.9993 (t)	There is only one group of hydrogen atoms that has two neighbors.
D	3.4755 (s)	This hydrogen group is part of a methoxy group, but this the most shielded of all the methoxy groups in the molecule.
E	3.6076 (s)	The methoxy group here is more deshielded than in D, since it is closer to the electron-withdrawing carbonyl group.
F	3.6992 (s)	This group is closer than E to the electron-withdrawing carbonyl group.
G	3.8797 (s)	This group is closest to the electron-withdrawing carbonyl group.
I	4.9210 (s)	This H is bonded to an sp2-hybridized carbon atom.
CH2Cl2	5.3220-5.3177 (t)	This is the impurity peak for dichloromethane (CH2Cl2), which was the solvent system used in the H NMR.
H	5.6858-5.6962 (d)	These two hydrogen atoms are bonded to a carbon that is bonded to a deshielding nitrogen atom.  They are diastereotopic, and so split each other.
M	6.6406-6.6994 (m)	This group is closest to the deshielding carbonyl withdrawing group, and is near an electron-donating phenyl group.  Both M hydrogens are also shielded by the two electron-donating oxygen atoms in the ring.
J	6.7328-6.8472 (m)	These aromatic H atoms are closest to the electron-donating methoxy group.
K	7.0721-7.1410 (m)	These aromatic hydrogen atoms are more deshielded than the J atoms because they are farther from the electron-donating methoxy group.
L	7.1568-7.2851 (m)	This group is in conjugation with both the carbonyl electron-withdrawing group and the methoxy donating group, but because of the electron-withdrawing group, it is more deshielded than either J or K.