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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?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 AFrom the following 1H-NMR and 13C-NMR spectra, assign a structure for a compound with a formula of C4H9Br. Give reasons (explanations) for the choosen structure.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 ppm
- The options to choose from are: -Relative number and number of types of hydrogen -absolute number and number of types of hydrogen -confirms molecular weight of molecule -relative number and number of types of carbon -confirms presence of functional groups -number of types of carbon -relative number of functional groupsSynthesis also label any major/minor/trace productsAssume 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?
- Which tracking dye is used in SDS-PAGE? O bromothymol blue O bromophenol blue O coomassie blue O acridine dyeN-H bonds in ammonia NH_3NH3 produce an IR absorbance at 3335 cm^-1. P-H bonds in phosphine PH_3PH3 produce an IR absorbance at 2327 ccm−1. Explain the difference in a single sentenceThe pka's of the the three hydrogens of phosphoric acid are 2.15, 7.2 and 12.3. These numbers tell us that it is much more difficult to remove the second and third hydrogens of phoshoric acid. Why do you think this is so?