Signature:Q1. For each of the following molecules, determine how many signals you would expect to seein an ¹H-NMR spectrum of the molecule. Additionally, label each of the hydrogen atoms (A, B, C,...) such that those in the same chemical environment are given the same designation anddetermine the expected splitting for all protons (s, d, t, q, m etc.).a.b.Q2. How many 13C signals would you expect for the following compounds?a.LOHb.CIH

1. 1H NMR signals:a) 6 signals.There are 6 different protons giving 6 signals.a. 3 Methyl protons at…

Answered: Signature: Q1. For each of the…

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

ChapterL4: Proton (1h) Nmr Spectroscopy

Section: Chapter Questions

Problem 12CTQ

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Following is the mass spectrum of an unknown compound. The two highest peaks are at m/z 120 and 122. Suggest a structure for this compound. (Data from http://webbook.nist.gov/chemistry/.)
Here are proton NMR data for 1-bromopropane: Ha : triplet (2H) 3.32ppm; Hb : multiplet (2H)1.81ppm; Hc : triplet (3H) 0.93ppm. (Relative integrations shown in parentheses.) a. Through how many bonds can a hydrogen split another hydrogen? b. According to this splitting rule, does Ha split Hc ? c. Is your answer in part a) consistent with the multiplicity listed for peak clusters a and c? d. How many hydrogenssplit Hb ? e. Upon very close inspection of the proton NMR spectrum of 1-bromopropane, you wouldfind that peak cluster b has at least six peaks. Is this consistent with your answer in part d)? f. Speculate as to why any peak cluster with more than four peaks is listed simply as a"multiplet."
Following are infrared spectra of nonane and 1-hexanol. Assign each compound its correct spectrum.
Following are mass spectra for the constitutional isomers 2-pentanol and 2-methyl- 2-butanol. Assign each isomer its correct spectrum.
Q6. Complete Table 6. i) Copy and paste (insert) the correct alternative of the structures below into the table, ii) insert expected number of different ¹H and 1³C environments expected for these compounds (Table 6: columns 2 and 3 respectively) and correctly label the ¹H and ¹³C NMR spectra below in boxes provided .CI CI Table 6: Assigning NMR spectra for aromatic Structures of disubstituted No. of expected ¹H NMR peak/s benzene compounds 1,2-dichorobenzene 1,3-dichorobenzene .CI 1,4-dichorobenzene CI compounds No. of expected ¹³℃ NMR peak/s
4. There are two spectra on the next page, one for each of the following compounds: W с Draw a resonance structure of each compound (use the alkene electrons, and think of D as an enol ether). How could these resonance structures be used to distinguish the spectra? (Think about, in particular: a) How can the chemical shifts of the vinylic protons be used to distinguish which spectrum belongs to which compound? b) How can the chemical shift of the aliphatic (i.e. sp³) methylene group be used to distinguish which spectrum belongs to which compound?) A w || YY 10 W H D 3 WE Y B W H MI H
Magnetically equivalent protons give a single signal in 1H-NMR. How many signals will be observed in the 1H-NMR spectrum of the compound in the figure? (TO). 4 (B). 6C). 8 (D). 10 CH3
Please help me answer these questions thank you
Please help me with 1 and 2 thank you
Which of the following C5H8 compounds best fits the spectrum. The integration values are shown above the individual resonances. 1.00 C3H3 3.00 1.99 1.98 4.5 4 3.5 2.5 1.5 0'5 A) CH;CH,CH,-CEC-H B) CH;CH,-CEC-H CH3 D) A O O O
In a HNMR spectrum, the molecular structure * where A, B and D are different parts that contain no NMR-active atoms, would produce which of the following features? OA Two signals of equal strength, each being a doublet. B. Two signals of equal strength, each being a triplet. OC. Two signals, one three times the strength of the other, with the stronger one being a doublet. D. Two signals, one twice the strength of the other, with the weaker one being a triplet and the other a doublet. OE. One unsplit signal.
Provide your expectation of the chemical shifts of each molecule below in the 1H NMR spectrum of the molecules below. Please label the non-equivalent protons in each given molecule.

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