Qu X Studen M Inbox Wordle | E Intro A Home Forest + data co E Project | Meetin Title + OASIS & Shared + O is.edu/courses/848465/quizzes/234535/take Question 17 Br A B OH ملا تو E OH C 6 pts G H D H F How many different signals would you expect to see in the 1H NMR of the given compounds? (i.e. different chemical shifts)? Compound A = Compound B = Compound C = Compound D = Compound E = Compound F = Search 10:28 PM 3/15/2024 4

xx How many signals are expected in the ¹H NMR spectrum of the given compound? (Enter a numerical value.)

A3

H NMR (300 mMHz, CDCl3, 21C) 0.92 ppm (t, 3H, J = 7Hz), 1.20 (s, 6H), 1.50 (q, 2H, J = 7 Hz), 1.64 (broad singlet, 1H). Choose the chemical shift of the three lines in the triplet signal at 0.92 ppm? (Select all correct answers) a b с d f b0 0.920 ppm 0.897 ppm 0.943 ppm 7.920 ppm 6.080 ppm 0.998 ppm 0.842 ppm

Compound 4, Formula + Unknown MS: M peak at 74 C-NMR: There Z are (3) signals. Compound 4, Formula Unknown MS: M* peak at m/z 74 100 90 80 70 60 50 40 30 20 10 of 4000 mmm 1 H 3500 11-12 ppm 3000 C-NMR: There are (3) signals. 2500 2000 1800 1600 1400 1200 1000 800 2 H 3 H

Total number of stereoisomers possible for the following compounds is HINT: a. 4 How many possible stereoisomers? How do we know how many stereoisomers are possible for a given structure? There is actually a straightforward way to figure this out. All we need to do is count the number of chiral centers and stereogenic alkene groups, the use this following rule: number of stereoisomeric forms = 2" ... where n = the number of chiral centers plus the number of stereogenic alkene groups b. 2 Consider for example a molecule with two chiral centers and one stereogenic alkene. By the rule stated above, we know right away that there must be eight possible stereoisomers. terminal alkene OH stereogenic alkene C. 8 OH d. 3 OH chiral center HO OH 3 2 = 8 T nonstereogenic alkenes (cannot be labelled E or Z) ←

#3) Using the following spectra and other information provided, identify the compound. Assign pertinent peaks in the spectra. Label the peaks on the spectrum and place the structure of the compound in the box on the right side of the spectrum - Identify correct compound - label proton spectrum - label carbon spectrum

Name 4 chemical chifts, their multiplicity and their assignments using the following NMR spectrum?

ch1