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43 Cards in this Set
- Front
- Back
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Chemical Shift Equation
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distance of peak from (CH3)4Si in Hz / spectrometer frequency in megahertz
-answer is in ppm |
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Alkane and Alkane like hydrogens
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-primary alkyl:RCH3 .8 - 1.0 ppm
-secondary alkyl:RCH2R' 1.2 - 1.4 -tertiary alkyl:R3CH 1.4 -1.7 ppm |
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Allylic (next to double bond)
R2C=CCH3 R |
1.6 to 1.9 ppm
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Benzylic (next to benzen ring)
ArCH2R |
2.2 to 2.5 ppm
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Ketone
RCCH3 ll O |
2.1 to 2.6 ppm
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Alkyne RC(triple bond)CH
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1.7 to 3.1 ppm
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Choloralkane: RCH2Cl
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3.6 to 3.8
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Bromoalkane: RCH2Br
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3.4 to 3.6
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Iodoalkane: RCH2I
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3.1 to 3.3
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Ether: RCH2OR'
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3.3 to 3.9
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Alcohol: RCH2OH
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3.3 to 4.0
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Terminal Alkene: R2C=CH2
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4.6 to 5.0
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Internal Alkene R2C=CH
R' |
5.2 5.7
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Aromatic: ArH
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6.0 to 9.5
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Aldehyde: R-CH
ll O |
9.5 to 9.9
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Alcoholic Hydroxy: ROH
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.5 to 5.0 variable
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Thiol: RSH
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.5 to 5.0 variable
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Amine: RNH2
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.5 to 5.0 variable
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CH3F
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4.26 (chemical shift for CH3 group)
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CH3OH
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3.40 (chemical shift for CH3 group)
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CH3Cl
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3.05 (chemical shift for the CH3 group)
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CH3Br
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2.68 (Chemical shift for the CH3 group)
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CH3I
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2.16 (chemical shift for the CH3 group)
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CH3H
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.23 (chemical shift for the CH3 group)
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C NMR Shifts: primary, secondary, tertiary, quarternary carbon
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Primary: 5-20 ppm
Secondary: 20-30 ppm Tertiary: 30-50 ppm Quarternary: 30-45 ppm |
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C NMR Shift for allylic carbon
R2C=CCH2R' R" |
20-40 ppm
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C NMR for Choloralkane: RCH2Cl
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25-50 ppm
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C NMR for bromoalkane: RCH2Br
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20-40 ppm
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C NMR for Ether or Alcohol
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50-90 ppm
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C NMR for Carboxylic acid: RCOOH
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170-180 ppm
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C NMR for aldehyde or ketone
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190-210 ppm
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C NMR for alken, aromatic
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100-160 ppm
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C NMR for alkyne
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65-95 ppm
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Alchohols
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3200-3650 cm-1 (O-H Bond)
1000-1260 cm-1 (C-OR Bond) |
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Carboxylic Acids
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2500-3300 cm-1 (O-H Bond)
1710-1760 cm-1 (C=O Bond) |
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Amines (R2N-H)
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3250-3500 cm-1 (N-H Bond)
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Alkynes
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3260-3330 cm-1 (C-H Bond)
2100-2260 cm-1 (C triple bond C) |
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Alkenes
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3050-3150 cm-1 (C-H bond)
1620-1680 cm-1 (C=C bond) |
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Alkanes
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2840-3000 cm-1 (C-H Bond)
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nitriles
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2220-2260 cm-1 (C triple bond N)
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aldehydes, ketones
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1690-1750 cm-1 (C=O Bonds)
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esters
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1735-1750 cm-1 (C=O Bond)
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ethers
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1000-1260 cm-1 (C-OR Bond)
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