ORGANIC CHEMISTRY Chapter g o Chemical shifts measured with respect to tetramethylsilane, (CH)Si(i.e. TMS) Similar factors affect the chemical shifts in 3c as seen for h nmr Normal"IC spectra are "broadband, proton decoupled"so the peaks show as single lines o Number of peaks indicates the number of types ofc Department of Chemistry, Xiamen UniversityORGANIC CHEMISTRY Department of Chemistry, Xiamen University Chapter 9 Chemical shifts measured with respect to tetramethylsilane, (CH3)4Si (i.e. TMS) Similar factors affect the chemical shifts in 13C as seen for H NMR "Normal" 13C spectra are "broadband, proton decoupled" so the peaks show as single lines Number of peaks indicates the number of types of C