(Solved):   figure 1: portion of the 1H NMR spectrum of DSS compound on the same spectrum? 7- The H ...

 

figure 1: portion of the 1H NMR spectrum of DSS

compound on the same spectrum? 7- The ¹H NMR spectrum of DSS, 1.75 and 2.9 ppm at pH 7.4. 4,4-dimethyl-4-silapentane-1-sulfonic acid, contains 4 signals at 0, 0.6, 7.a- What is the frequency difference between the various signals on the currently considered spectrometer? 7.b- What would the corresponding frequency be on a 600-MHz spectrometer? 7.c- With the help of chemical shift tables and your chemical knowledge can you assign the 4 signals? Explain your reasoning. 7.d- Does the signal at 0 ppm correspond to a singlet, doublet, triplet...? 7.e- Let's consider that the integral of the signal at 0 ppm has a value of 100. What would be the value of the integral for the other signals? 7.f- The downfield shifted signals are shown on the spectrum below. Can you rationalize the shape of each resonance with your current chemical knowledge? 7.g- How many signals would the 13C NMR spectrum contain? The 29Si spectrum? T 1.0 0.9 0.8 0.7 0.6 ppm 2.9 2.8 2.7 2.6 2.5 2.4 2.3 2.2 2.1 2.0 1.9 1.8 1.7 1.6 1.5 1.4 1.3 1.2 1.1