Q1 27) For the structure below the number of proton NMR signals is(A) 2 (B) 3 (C)5 (D) 6 (E) 4BrHBrH₂H28) Which of the following is true for the molecule in question 27?(A) He and He are homotopic(B)He and Hr are enantiotopic(C) He and HF are diastereotopic(D) H. and He are chemically equivalent29) How many proton signals are expected for the molecule shown below?(A) 1 (B) 2 (C) 3 (D) 4OH30) How many proton signals are expected for the molecule shown below?(A) 1 (B) 2 (C) 3 (D) 4

Answered: Image /qna-images/answer/2eb0190c-c384-42cd-8d3a-cd1df9b08295.jpg

27) For the structure below the number of proton NMR signals is (A) 2 (B) 3 (C)5 (D) 6 (E) 4 Br H на Br 28) Which of the following is true for the molecule in question 27? (A) He and He are homotopic (B)H. and He are enantiotopic (C) H. and HF are diastereotopic (D) H. and He are chemically equivalent 29) How many proton signals are expected for the molecule shown below? (A) 1 (B) 2 (C) 3 (D) 4 OH 30) How many proton signals are expected for the molecule shown below? (A) 1 (B) 2 (C) 3 (D) 4

27) For the structure below the number of proton NMR signals is (A) 2 (B) 3 (C)5 (D) 6 (E) 4 Br H на Br 28) Which of the following is true for the molecule in question 27? (A) He and He are homotopic (B)H. and He are enantiotopic (C) H. and HF are diastereotopic (D) H. and He are chemically equivalent 29) How many proton signals are expected for the molecule shown below? (A) 1 (B) 2 (C) 3 (D) 4 OH 30) How many proton signals are expected for the molecule shown below? (A) 1 (B) 2 (C) 3 (D) 4

Organic Chemistry

8th Edition

ISBN:9781305580350

Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Publisher:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Chapter20: Dienes, Conjugated Systems, And Pericyclic Reactions

Section: Chapter Questions

Problem 20.25P

See similar textbooks

Similar questions

The IR and NMR spectra are given for an unknown with the following isotopicdistribution: 178 (100%), 179 (9%), 180 (33.1%). What is the formula of the molecule and show the structure?
Can you give an example of homotopic, heterotopic, enantiotopic, and diastereotopic for compounds?
What is the NMR Spectra for C6H10O2 and what is the chemical formula for the compund?
The IR and NMR spectra are given for an unknown with the following isotopicdistribution: 178 (100%), 179 (9%), 180 (33.1%)
What are the functional groups or peaks for this C6H14O IR spectra?
The IR and NMR spectra are given for an unknown with the following isotopicdistribution: 178 (100%), 179 (9%), 180 (33.1%) find the formula for the molecule
How could 1H NMR spectroscopy be used to distinguish among isomersA, B, and C?
An aromatic compound K, whose molecular formula is C8H11N, is examined in the laboratory to elucidate its structure. The following observations were made: A) Compound K is soluble in dilute hydrochloric acid but insoluble in sodium hydroxide solution. B) Treatment of compound K with excess potassium hydroxide and benzenesulfonyl chloride, C(6)H(5)SO(2)Cl, results in the formation of a heterogeneous mixture. The NMR spectrum of compound K is shown below. C) Compound K when treated with acetic anhydride[CH3-C(O)-O-C(O)-CH3], gives compound L, whose molecular formula is C(10)H(13)ON. Compound L is insoluble in dilute acid or dilute base at room temperature, heating compound L in dilute acid or base, however, regenerates compound K. D) When compound L is heated with a mixture of concentrated nitric acid and sulfuric acid, a single product, compound M, with the molecular formula C(10)H(12)O(3)N(2) is formed in excellent yields. On the basis of these observations draw the structures of…
How would the pKa values of carboxylicacids, alcohols, ammonium ions 1RNH32 + , phenol, and an anilinium ion 1C6H5NH32 + change if they were determined in a solvent less polar than water?
The IR and NMR spectra of the material whose structure formula is C16H22O4 are given below.To this datawhat could be the ingredient?
The two compounds 1,2-dibromobenzene and 1 3-dibromobenzene both have the molecular formula C6H4Brz. a)Draw the chemical structures of the two molecules. b)Can these two molecules be distinguished by 1H NMR spectroscopy? Give reasons for your answer and describe the number of proton environments and their splitting for both molecules. Can these two molecules be distinguished by 13C NMR spectroscopy? Give reasons for your answer. Can these two molecules be distinguished by IR spectroscopy? Give reasons for your answer and describe the main IR signals (with frequencies) you expect to see for both molecules. Can these two molecules be distinguished by mass spectrometry? Give reasons for your answer.
What is the index of hydrogen deficiency of a compound with the empirical formula C5H11NO? a) 0 b) 1 c) 2 d) 3