CHEM 3P40 Lecture Notes - Nuclear Magnetic Resonance Spectroscopy, Combustion Analysis, 10 Nanometer
11 Sep 2013
School
Department
Course
Professor
Document Summary
The importance of spectroscopy: identification of unknown organic compounds. What else is in the reaction mixture? (impurities, other compounds?) The goal is to be able to put all of the obtained data together and correctly interpret it. As the number of data increases, the complexity or the size of the molecule being analyzed increases: traditional methods of analysis: Taste, smell, color (obsolete and quite dangerous!) These methods work, but there are obvious drawbacks, such as the destruction of the sample: modern methods (extensive field): Mainly the elucidation of the structures of organic compounds, but also of inorganic and organometallic compounds. This analysis is done on dilute samples (solutions) or small amounts of the compound in vapor phase to minimize the interaction between molecules: main methods: Nuclear magnetic resonance (nmr): 10mm-100m, generally insensitive method of detection. (bell and hammer analogy). Will not ionize the sample, but will excite electrons (which may cause isomerization to occur).
