CHEM 14C Study Guide - Midterm Guide: Electronic Correlation, Sodium Chloride, Polarizability
28 Feb 2018
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Direction of magnetic field (h: nucleus is in constant motion (including rotation, hydrogen nucleus is generating its own magnetic field = h0 or b, counterclockwise rotation = direction of electric current. Hydrogen nuclei will either align w/ or against the external field (only 2 orientations), but usually h is chaotic/ random. Uv visible light uv visible hv = excitation from a bonding mo to antibonding mo (electornic excitation) Nmr = radio frequency = rf radiation (weakest type of energy) In ir, hooke"s law = determined frequency of vibration due to different functional groups: but in mnr = proton surrounding magnetic field results in a specific e. A proton"s chemical environment = influences e. Determining number of h-nmr signals: get 1 signal for each set of equivalent set of protons that are different from other equivalent sets of protons. This mirror plane shows that left and right side are the same.
