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/ColorSpace [ /Indexed /DeviceRGB 1 34 0 R ] The carbonyl stretch C=O of esters appears: Figure 10. shows the spectrum of ethyl benzoate. El]k1YaAlJ=Pt#=E2m?>NeC6GTqRPZ8b;u`L^4'C%-NuX+A`UoJo75P#S(*^6,Wd; 1811 mZR$Kq-R34,5V0YKS2WIA/;tB6,]2DD? k]09\N"$oT=DWR3Aa1R.==(glT#nS2NfYh&No'"EB;CibjN-TJ*_[mLDGYTo-$HcF /Filter [ /ASCII85Decode /LZWDecode ] )!QfZCE:'] Thus your typical IR spectrum runs from 4000 to 400 cm-1 Wavenumber is directly related to energy; the higher the energy of the absorption 1. #XJO]Je8b)+WDXHU-jg"c8^W9,!$*?#XMlAOpIbu$&/=i*3mdK+A@iL=R&`Da#N". ":-2J+QP54#n^?>k$eW>Pl?8rLI[$og=V4+cb[g2 endstream

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+i)eb-[Ia.p*%Dr+i%Q?5kZ 12.4 FUNCTIONAL-GROUP INFRARED ABSORPTIONS A typical IR spectrum contains many absorptions.

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A:g=[;(<6E+pjpMk?6qpRAg1;7aee_NcdUn!(c#n!_m/jLP;X!.ZU)cRt'J^+i3-q'gR'+>2/ /F3 20 0 R TuYTbLPiLV\'LL1m6N3_&.2" H,h#sA8kj+Na5#:3JZ&$FNA)7K.uNo7hapn#985(E2XmY.17B2!XC&:"Ant?J`,>e 45 0 obj _ia/G.9/6-j>r:"IMOc! 26 CHARACTERISTIC INFRARED ABSORPTION BANDS OF FUNCTIONAL GROUPS Class of Compounds -Absorption, cm 1 Intensity -Assignment Class of Compounds Absorption, cm 1 Intensity Assignment Alkanes and 2850-3000 s C-H stretch Carboxylic Acids 2500-3500 s, broad O-H stretch Alkyls 1450-1470 s C-H bend R-C(O)-OH 1710-1715 s, broad C=O stretch