Draw out the structure: The Key signals for IR are = 3090, 2800-3000,1700,1455,1560,1598,1110,1290 cm^-1. MS is = M+ 150,m/z121,105,77. 1H NMR is=7.5 –7.9 m,4.1 q,1.2 t.; 13C NMR: 14.4,60.8,128.4,129.7,131,133,167ppm
Draw out the structure: The Key signals for IR are = 3090, 2800-3000,1700,1455,1560,1598,1110,1290 cm^-1. MS is = M+ 150,m/z121,105,77. 1H NMR is=7.5 –7.9 m,4.1 q,1.2 t.; 13C NMR: 14.4,60.8,128.4,129.7,131,133,167ppm
Chapter13: Structure Determination: Nuclear Magnetic Resonance Spectroscopy
Section13.SE: Something Extra
Problem 59GP: The mass spectrum and 13C NMR spectrum of a hydrocarbon are shown. Propose a structure for this...
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Draw out the structure:
The Key signals for IR are = 3090, 2800-3000,1700,1455,1560,1598,1110,1290 cm^-1. MS is = M+ 150,m/z121,105,77. 1H NMR is=7.5 –7.9 m,4.1 q,1.2 t.; 13C NMR: 14.4,60.8,128.4,129.7,131,133,167ppm
Expert Solution
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Step 1
- Number of signals in 1H NMR = Number of sets of protons in different electronic environment
- Multiplicity of signals in 1H NMR tells us about the number of protons on the neighboring carbons
- Number of signal in 13C NMR = Number of sets of carbons in different electronic environment
- M+ peak in MS tells us about the MW of the molecule
- IR tells us about functional group
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