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A: Find the complete detailed solution given below.
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- Label each set of chemically equivalent protons, using a for the set that will be at the lowest frequency in the 1H NMR spectrum, b for the next lowest,and so on. Indicate the multiplicity of each signal.The carbon NMR chemical shifts of diethylmethylamine, piperidine, propan-1-ol, andpropanal follow. Determine which spectrum corresponds to each structure, and showwhich carbon atom(s) are responsible for each absorption.7.9, 44.7, 201.9Estimate the 1H NMR chemical shift for the protons onC2 in the following compound.
- 3-Bromo-1-phenyl-1-propene shows a complex NMR spectrum in which the vinylic proton at C2 is coupled with both the C1 vinylic proton (J = 16 Hz) and the C3 methylene protons (J = 8 Hz). Draw a tree diagram for the C2 proton signal, and account for the fact that a five-line multiplet is observed.The 13C-NMR spectrum of 3-methyl-2-butanol shows signals at 17.88 (CH3), 18.16 (CH3), 20.01 (CH3), 35.04 (carbon-3), and 72.75 (carbon-2). Account for the fact that each methyl group in this molecule gives a different signal.When the 1HNMR spectrum of an alcohol is run in dimethylsulfoxide (DMSO) solvent rather than in chloroform, exchange of the Ο-H proton is slow and spin-spin splitting is seen between the Ο-H proton and C-H protons on the adjacent carbon. What spin multiplicities would you expect for the hydroxyl protons in the following alcohols? (a) 2-Methyl-2-propanol (b) Cyclohexanol (c) Ethanol (d) 2-Propanol (e) Cholesterol (f) 1-Methylcyclohexanol
- 1. methyl butanoate2. benzaldehyde3. 1-chlorobutane4. 1-chloro-2-methylpropane5. butan-2-one6. propan-2-ol7. propanal For each of the possible listed unknowns above, draw and label its structure. Then, provide a brief description of how you will identify the corresponding proton NMR spectrum for that compound. Be specific.06) The following spectrum refers to an ester of formula C5H8O2. The multiplicities of signs are based on proton-coupled 13C and are indicated above the peaks. give the formula structure and the assignment of each peak.How many proton and carbon signals are expected for the 2 possible regioisomers? Clearly mark the chemically distinct/inequivalent carbons in your structures.
- V.) A compound with molecular formula C8H10O has the following proton NMR spectrum. Determine the number of protons giving rise to each signal (a, b, c, and d). (SEE PICTURE ATTACHED).Isoamyl acetate is the primary component of artificial banana flavor. Which signals will be in the positive phase, negative phase, or nonexistent in normal 13C NMR, DEPT-90, and DEPT-135 of isoamyl acetate?identify the groups of homotopic protons and from these, the group with the lowest and the group with the highest shift values. Give an estimate for these shift values.