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Analyze the IR spectrum of fumaric acid by writing down and indicating the main bonds. Ignore anything below 1500 nm-1 .
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- what is the meaning of "7H" in 7H-purine?Do you expect the following reaction to occur? Why?Name the following compounds A and B. How could you distinguish these two molecules by using 1H NMR and IR techniques? Propose an analytical technique to determine the iron content of these compounds. Calculate the mass percentages of C and H of compound B (C: 12.01 g/mol; H: 1.008 g/mol; Fe: 55.845 g/mol).
- Why is deuterium oxide used in many NMR experiments in place of water (H2O)?Analyze the ¹H NMR spectrum of methyl crotonate. Use the integrations, splitting patterns, and chemical shifts to assign the protons for the structure. HC H3C A -7.271 7.013 6.974 6.939 s J 1.01 7.0 5.873 5.869 -5.834 -5.830 [ HB 6.0 O 5.0 3.905 4.0 VCL C 3.07€ -3.538 CH3 D T 3.0 f1 (ppm) 006 .894 -1.891 100 3.291 2.0 .877 1.874 .872 1.0 000*0- B 0.0 © University of Michigan Answer Bank U D APlease solve question 2 and explain
- A compound A of mass 114 has the following elemental analysis: C = 63.14%, H=8.83%. The IR, 1H NMR and 13C NMR spectra are given below. 1) Assign and interpret all the data from the 1H NMR and 13C NMR spectra. Propose a formula for A. 7.0 175 с 3000 1,3; 13 I=1 6.0 150 I=1 с 5.0 CH₂ 125 2000 Explain why the answer is this one : CH,—CH,—0 4,2; 60 mavermy I=2 cm-1 4.0 100 1500 3.0 75 135 167 | CH₂ 6 125 CH 3 1,95 ; 18 I=3 1000 2.0 50 H 5,5 I=3 1.0 CH₂ CH₂ 25 500 Ppm ppmA) Phenol Red is a weakly acidic dye which is yellow in the HA form and red in the A form. What concentration of Phenol Red is required to obtain an absorbance of 0.50 at 550 nm at pH 7.8? Note: ε550 of A = 2.5 x 104 M-1 cm-1; ε550 of HA = 0; pKa = 7.8. B) What would the absorbance of the solution in part (a) be if the pH was 8.8?Which of the following compounds will form yellow or orange precipitate when reacting with 2,4-dinitrophenylhydrazine? Choose all that apply. 0 о 1 5 H ОН 2 хон 6 0 3 ОН 7 4 8 0 ОН
- U UU U U QUESTION 6 Which of the following compounds will form yellow or orange precipitate when reacting with 2,4-dinitrophenylhydrazine? Choose all that apply. 3 4 5 6 7 8 1 5 H 2 3 4 OH Дон OH ОН 6 7 8Assume that you are in a laboratory carrying out the catalytic hydrogenation of cyclohexene to cyclohexane. How could you use a mass spectrometer to determine when the reaction is finished?What is the structure of this molecule and ignore the 77 ppm triad in Csrbon-13 NMR. Mass of structure is 162.
