CHEM 2444 Chapter Notes - Chapter 14: Electromagnet, Free Induction Decay, Uncertainty Principle
Document Summary
C6h12o: 1:2:3:6 = 12 (all 12 h accounted for) Ratios (assume everything is connected to carbon for the time being) 4 different types of h but all h in each signal are identical. 6h = 2ch3: integration is the conversion of signals into identical hydrogens, and then into actual fragments of the original molecule. Ft-nmr: a short blast of radio waves is delivered to the sample and then re-emitted radiation by the sample is monitored over time. Complex fid pattern contains info on all the nuclei that were excited by our radiation pulse. We can convert these oscillations in time back to each nucleus" frequency by using a mathematical process called a fourier transform. 1 h nmr: low field (downfield) closer to 8 ppm. Lower magnetic field to resonate: high field (upfield) closer to 0 ppm. Higher magnetic field to resonate: tms = tetramethyl sylane.
