Question 10 [1.2 pts] A certain compound was analyzed using a 400 MHz NMR spectrometer. The resulting spectrum exhibits a singlet at 4.5 ppm and a singlet at 7.5 ppm. What numerical value (expressed as a whole number) correctly completes the following statement. The two singlets are separated by __ Hz.
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Question 10 [1.2 pts] A certain compound was analyzed using a 400 MHz NMR spectrometer. The...
i need help. can you please explain and
show the math too thanks!
Question 8 [1.5 pts] A certain proton NMR spectrum exhibits signals at 5.0 ppm and 9.0 ppm. The operating frequency of the spectrometer is 200 MHz. The two peaks are separated by how many Hz? Please carry maximum number of significant figures through to final answer then round to a whole number. Do not include units. Do not use scientific notation
Question 11 [1.4 pts] A certain proton NMR spectrum exhibits one singlet, one quartet and a number of other peaks. The height of the singlet’s “integration step” is 16 mm while the quartet’s “integration step” is 127 mm. Given that the singlet is due to one proton how many protons (expressed as a whole number) are responsible for the quartet?
the
compound is dibenzalacetone
-NMR (expansion 7.0-7.8 ppm (400 MHz) in CDC13 7.76 7.72 DO 7.07 Solvent peak (ignorel) 7.80 7.75 7.70 7.65 7.60 7.55 7.50 7.45 7.40 7.35 7.30 7.25 7.20 7.15 7.10 ppm 18 Peak List for 1H NMR (8 in ppm) TH NMR (draw labelled structure here) (10 marks) Multiplicity Chemical shift 8 (ppm, 4 decimal places) Coupling constant Integral J (Hz) Assignment indicate whether it is a singlet (s) doublet (a), triplet 3. quartet (allor dd...
QUESTION 3 If a CH3 proton appears in NMR spectroscopy at 1.2 kHz in a 600 MHz instrument, where would this signal appear in parts per million (ppm) scale? 0.002 ppm 0.5 ppm 2 ppm 5 ppm QUESTION 5 Predict the NMR spectrum of the following compound: на H2 Hз -NO2 H1 no H1 H2 H3 Hj shows triplet near 1.0 ppm, H2 shows multiplet near 2.0 ppm, H3 shows triplet near 4.5 ppm Hy shows triplet near 1.0 ppm,...