4. A chemist isolated a compound in the lab with the formula of C,H,Br. This chemist quickly realized that there are two possible structural isomers with this formula therefore, she arranged to determine which isomer is present by taking a 'H NMR spectrum of the compound. Your goal for this problem is to discuss how to distinguish between the two compounds, 1-bromopropane and 2- bromopropane using 'H NMR. In your discussion, you should address the differences she would expect for the number of signals for each compound as well as the integration of each signal and the spin-spin splitting of each signal for each compound.

Which of these choices best describes the interpretation of the following peak that may be recorded in a 'H NMR spectrum? 3.0 8 (1H, t). The underlined hydrogen atom is intended to be the one producing the peak that we are interpreting. Ar-CHCO2H Ar-CHCHX2 Ar-CHCH,X Ar-CHCH3 None of these interpretations describes this peak.

1512.99 1509 70 as00. 78 1497.96 1489.04 1485 75 QUESTION 1 CH3 3.1 3.0 2.9 H NMR signal for broton at position X/Y The atoms at positions X and Y in compound A above are a Cl and a H. By analysing the multiplet structure for the H atom located at either position X or Y in 'H NMR spectrum for A, determine whether the H atom resides at position X or Y? Fully explain your reasoning.

For the following compound: C3H5BrO2​​​​​​​​​​​ (Molecular Weight = 152)   -Calculate the degrees of unsaturation -Use the IR and NMR to determine the structure for your compound -All 1H NMR peaks (number of signals, chemical shift, integration and splitting)-All 13C NMR peaks (number of signals and chemical shift)-All IR peaks that are important (no need to look into the fingerprint region!)-Your proposed structure of the compound (C3H5BrO2)​​​​​​​​​​​ and how it matches with the spectra (images attached)

C,HBrO2, The strong peak at 1750 cm The molecular formula of an unknown compound is The proton NMR data is, 1.2d(6H, d), 4.2d(1H, t), 2.2d(2H, quintet), 4.93d(1H, septet), 1.08d(3H, t). What is the name of the unknown compound? ethyl 2-bromo-3-methylbutanoate 1-bromopropyl isobutyrate 1-bromoethyl 3-methylbutanoate Isopropyl 2-bromobutanoate

Instructions: Consider the following 'H NMR to answer the following question. 14 12 10 Chemical shifn (8) Spectrum obtained from: SDBSWeb: http:/ riodb01.ibase aist go jp sdbs (National Instirute of Advanced Industrial Science and Technology, 11-07-05) Refer to instructions. This compound is known to contain both a -C=0 group and an -OH group. Based on this spectrum, this compound would be classified as: aliphatic carboxylic acıd aromatic carboxylic acid more than one are possible carbonyl containing an alcohol functional group

How many signals would one expect to see in the 'H NMR of 4-methylanisole? What ratio of peak areas (ie, integration) would one expect for the integration of the spectrum? Refer to Appendix 4 for the approximate shifts and sketch what the spectrum would look like. 10 8 7 6 5 4 3 2 1

Cc.18.

Show how the NMR spectrum of 2-bromo-2-methylbutane would look like, include approximate chemical shifts, integration ratios, and signal multiplicity. Briefly state your reasoning so i can understand better, thanks!

3. An unknown compound having the formula C9H₁2 gave the following ¹H NMR spectral data. Write a structural formula of the compound that is consistent with the data. Assign the delta value to the hydrogens in your proposed structure. Delta value 0.93 1.63 2.58 7.19 Multiplicity Triplet Sextet Triplet Narrow multiplet Integration 3H 2H 2H 5H