Your sister will teach you spectroscopy..3 ACETYL COUMARIN

 

3 ACETYL COUMARIN

CAS 3949-36-8

Synonym Name:	3-Acetyl-2H-chromen-2-one; 2H-1-benzopyran-2-one, 3-acetyl-; 3-acetyl-chromen-2-one
Synthesis Reference:	Monatshefte fur Chemie, 121, p. 85, 1990

H1 NMR Spectrum

Predict NMR spectrum

Liu, Jinbing; Wu, Fengyan; Chen, Lingjuan; Zhao, Liangzhong; Zhao, Zibing; Wang, Min; Lei, Sulan
Food Chemistry, 2012 ,  vol. 135,  4  pg. 2872 - 2878

 http://www.sciencedirect.com/science/article/pii/S0308814612011697

1H NMR, 400 MHZ

chloroform-d1

¹H NMR (400 MHz, CDCl₃):

δ 8.49 (s, 1H, C=CH),

7.65-7.63 (m, 2H, Ph-H),

7.37-7.32 (m, 2H, Ph-H),

2.71 (s, 3H, CH₃)

13 C NMR

(100 MHz, CDCl₃)

δ 195.41 (1C),  C=O OF ACETYL

159.17 (1C), C=O OF COUMARIN

155.27 (1C), ARC-O-C=O

147.39 (1C),

134.33 (1C),
130.17 (1C),

124.92 (1C),

124.48 (1C),

118.20 (1C),

116.63 (1C),

30.49 (1C)    -CH3

IR (KBr): 3078, 3026,

1723,  C=O

1675, 1598, 1556, 1441, 1406, 1351, 1297, 1220, 1198, 1162, 1098, 967, 762 cm^-1