第十八章有机波谱 Spe
第十八章 有机波谱 Spectroscopy Spectroscopy
红外光谱仪 红外光谱
Organic Chemistry Organic Chemistry Xiamen Xiamen University University 18.1 红外光谱
Synchronous motor Chart Synchronous motor Reference Attenuator 人 IR Source Grating Detector Chopper ①D Sample Monochromat ⑨D Filter odulat Pre amplifier Synchronous amp rectifier
Organic Chemistry Organic Chemistry Xiamen Xiamen University University
f(m1+ mo 12 2TC m1×m2 nnu e v=the frequency in cm-l f= the force constant a c=the velocity of light ⑨D
Organic Chemistry Organic Chemistry Xiamen Xiamen University University f(m 1+ m 2 ) m 1 × m 2 ν ~ = 2 π c 1 ν ~ = the fr equen cy i n c m-1 f = the fo rce c onstant c = th e v elo c ity o f ligh t
L振动类型 Stretching(伸缩振动 _ Bending(弯曲振动)
Organic Chemistry Organic Chemistry Xiamen Xiamen University University 振动类型 振动类型 Stretching( Stretching(伸缩振动 伸缩振动 )) Bending ( Bending (弯曲振动 弯曲振动 ))
Yaye umber cm 4000 5000 2500 2000 150 3012001100 R-0一H R一N一H R -C≡H ①D wavelength, micron ⑨D
Organic Chemistry Organic Chemistry Xiamen Xiamen University University
Bond O-H N一H C-H ≡C-H C-H C≡N C≡C C=C 1620~1680 C=0 1630~1780 Aromatic ring 1500and1650~1550
Organic Chemistry Organic Chemistry Xiamen Xiamen University University 1630 ~ 1780 3590 ~ 3650 Frequency Range (cm-1 Bond ) Aromatic ring 1500 and 1650 ~ 1550 1620 ~ 1680 2100 ~2200 2220 ~ 2260 3010 ~ 3095 ~ 3300 2853 ~ 2962 3300 ~ 3500 O H C O C C C C C N C H C H N H C H
Frequency [Cm1) ③20,111,12,1 ASSIGNMENTS 3350oH· Stretch 2950-CH Aliphatic Stretch 2860-CH Aliphatic Stretch 3350 1425-CH Bending 1425 1065. co Stretch 2860 1065 ①D 2950 ⑨D
Organic Chemistry Organic Chemistry Xiamen Xiamen University University
18.1.1 Hydrocarbons 100 1985 1417 9938912 1825 3080 sp'C-H stretching 1465 993 2965 asymmetric CH 2932 asymmetric CH 2876 symmetric CH3 1643 2845 symmetric CH2 92 1-Pentene CH3 CH2 CH2 CH=CH2 er cr
18.1.1 Hydrocarbons
18681750 Overtones 1170 spC-H stretch 1085 3062 2920 1030 8gcE销cm 1605 rIno 1496 696 Toluene -CH 729 4000 1500
