As mentioned in lecture, MRI (magnetic resonance imaging) works with the exact same principles as NMR and is superior to other imaging techniques such as CT or PET scan as these imaging techniques use ioning radiation and MRIS do not. One thing I hope we all retain 5 or 10 years from now is helping our friends and family understand how this works. Using the figure provided, provide a basic explanation as to how this technology works. Utilize all parts of the figure (A-E) and include the following terms: External magnetic field, Free induced decay, Fourier transform, Proton spin, Radio frequency, Spectrum. Protons In the MRI scanner A Protons in the Body RF pulse B0 magnetic field No magnetic field FT 50 Hz frequency
Electronic Effects
The effect of electrons that are located in the chemical bonds within the atoms of the molecule is termed an electronic effect. The electronic effect is also explained as the effect through which the reactivity of the compound in one portion is controlled by the electron repulsion or attraction producing in another portion of the molecule.
Drawing Resonance Forms
In organic chemistry, resonance may be a mental exercise that illustrates the delocalization of electrons inside molecules within the valence bond theory of octet bonding. It entails creating several Lewis structures that, when combined, reflect the molecule's entire electronic structure. One Lewis diagram cannot explain the bonding (lone pair, double bond, octet) elaborately. A hybrid describes a combination of possible resonance structures that represents the entire delocalization of electrons within the molecule.
Using Molecular Structure To Predict Equilibrium
Equilibrium does not always imply an equal presence of reactants and products. This signifies that the reaction reaches a point when reactant and product quantities remain constant as the rate of forward and backward reaction is the same. Molecular structures of various compounds can help in predicting equilibrium.
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