Assign each signal in the spectrum and give a brief explanation for each. Problem R-26L (C₂H₁₂) 300 MHz 'H NMR spectrum in CDCI, Source: Aldrich Spectra Collection/Reich g Hz لسلسلسسلسلسيليسيا 30 20 10 0 سلسل 1.7 1.6 1.5 1.4 ми المسلسلين 5.1 5.0 E 4.9 24 2.3 2.2 1.00 1.2 1.1 1.0 0.9 2.16 1.83 8.0 7.0 6.0 5.0 4.0 3.0 2.0 1.0 0.0 nom

From the proton spectrum given in Figure 19-45, determine the structure of this compound, a commc used painkiller; its empirical formula is C10H13NO2.

The following 1H NMR peaks were recorded on a spectrometer operating at 200 MHz. Convert each into δ units. (a) CHCl3; 1454 Hz (b) CH3Cl; 610 Hz (c) CH3OH; 693 Hz (d) CH2Cl2; 1060 Hz

In a 300 MHz NMR spectrometer, A) what is the Larmor frequency in MHz of a 15N nucleus? g H = N 26.752; g = 2.7126; B) Using the same NMR instrument, suppose that a 13C nucleus from a sample generates a signal which has a frequency of 11,250 Hz higher than that from the carbons in TMS. What is the chemical shift of that carbon atom from the sample? A) 30 MHz; B) 0.15 ppm OA) 25 MHz; B) 0.35 ppm A) 35 MHz; B) 0.30 ppm OA) 25 MHz; B) 0.55 ppm