Propose the structure of a monosubstituted geminal alkene that fits the following NMR spectrum.
NMR spectra of compound gives following information:
1) The relation between number of signals (peakss) and number of different kinds of hydrogens.
2)The area underneath each signal are in the same ratio as the number of hydrogen atoms causing signals.
3) The splitting patter depends on the number of neighbouring non-equivalent hydrogen atoms. Splitting pattern can be predicted by n+1 rule, where n is the number of neighbouring protons.
4) The chemical shift value tells the sheilding ot deshielding of protons.
5) The hydrogen atoms bound to a carbon consisting of a double bond are found in low field of the NMR spectrum, which is the left side, and the hydrogens are said to be deshielded. The cause for this is due to the movement of the electrons in the pi bond of the carbon-carbon double bond.
In the given question:
The mono substituted geminal alkenes are basically terminal alkene. So the proposed structure of molecular formula C5H10 may be as :
CH2=CH-CH2-CH2-CH3
If we observe the structure, we have six different types of hydrogen.
a) -CH3 - Highly shielded, will appear around 0.9 ppm, as a triplet, as spin spin splitting due to two neighbouring hydrogens
b) -CH2- : Will appear around1.4ppm, as a sextate, due to splitting by 5 neighbouring protons.
c) -CH2- ; Will appear around 2.0 ppm, as a quaderate, due to splitting by 3 neighbouring protons.
d) =CH - Will appear around 5.8 ppm, as a multiplet, due to splitting by neighbouring protons.
e) =CHe : Will appear around 4.8 ppm, as a triplet, due to splitting by neighbouring protons.
f) =CHf : Will appear around 4.9 ppm, as a multiplet, due to splitting by neighbouring protons.
Propose the structure of a monosubstituted geminal alkene that fits the following NMR spectrum.
Propose the structure of a disubstituted geminal alkene that fits the following NMR spectrum.4-4.jpg
Draw the structure that fits the following data. Molecular
formula: C6H12O 1H NMR spectral data: 13C NMR spectrum:
PLEASE HELP
the structure that fits the following data. Molecular formula: C6H12O H NMR spectral data: ppm 0.90 1.53 2.34 9.72 Integration6 4 1 1 Multiplicity triplet multiplet multiplet doublet C NMR spectrum:
Propose a structure for C3H5CIO2 that fits the following 1H NMR data: 1H singlet at 11.5 ppm; 1H quartet at 4.4 ppm; 3H doublet at 1.7 ppm
16. Propose a structure for a molecule of formula CaHsCl which gave the following 1H NMR spectrum. PPM 17. Propose a structure for a molecule whose mass spectrum shows a parent ion at m/z 148, an IR peak at 1680 cm'and gives the following H and 13C NMR spectra 3H зн 2H 2H 2H 3 5 2 7 6 4 PPM 160 140 180 60 220 200 20 0 120 100 80 40 PPM -
An amine with formula C8H11NO yields the following 1H-NMR
spectrum. Propose a structure for the compound.
Draw the structure that fits the following data. Molecular
formula: C6H12O 1H NMR spectral data: 13C NMR spectrum:
PLEASE HELP
the structure that fits the following data. Molecular formula: C6H12O H NMR spectral data: ppm 0.90 1.53 2.34 9.72 Integration6 4 1 1 Multiplicity triplet multiplet multiplet doublet C NMR spectrum:
9. Propose a structure for a molecule that has the following 'H NMR spectrum and a molecular formula of C3H30. The peak at 2.28 disappears when D20 is added to the sample. (5 points) бH HSP-03-214 ppm
Use a condensed structure to provide your answer. Propose a structure for an acyclic alkane having the following spectrum. The results of the DEPT spectra are given following the signals.4-6.jpg4-5.jpg
propose a structure that is consistent with the following set of
data
C4H1002 1H NMR spectrum IR spectrum 8 1.36 (3H, doublet, J= 5.5 Hz) Except for CH stretching, 8 3.32 (6H, singlet) nothing above 1500 cm-1 8 4.63 (1H, quartet, J= 5.5 Hz)
4. Propose a structure for a molecule whose mass spectrum shows a parent ion at m/z 100 with a base peak at m/z 43, an IR peak at 1720 cm' which gave the following 'H NMR spectrum. 33 N - PPM 5. Propose a structure for a molecule whose mass spectrum shows a parent ion at m/z 100 with a base peak at m/z 43, an IR peak at 1720 cm' which gave the following 'H NMR spectrum. doublet 2...