CHEM 233 Lecture Notes - Lecture 8: Ethyl Acetate, Isatin, Benzene
Document Summary
Lab 1: identification of unknown organic compounds by melting point, boiling point and infrared spectroscopy. The purpose of this lab is to determine the unknown solid and liquid samples through different techniques. From the elemental analysis, the molecular and empirical formulas are derived for the unknowns. Infrared (ir) spectroscopy doesn"t provide with chemical composition or quantitative data rather it provides the peaks at certain wavenumber indicating the carbon to carbon double/triple bonds, aromatic rings, carbonyl groups, or hydroxyl groups. Ir uses the wavenumber in cm-1 which provides direct relationship between energy and wavenumber and also proves the hooke"s law. Ir measures the light transmitted by the sample than absorption. The lower % transmittance, the greater is the absorption of light. The device used in this experiment is attenuated total. Reflectance (atr) ft-ir accessory that creates graphs with peaks indicating specific functional groups in unknown. Melting and boiling points techniques are used to figure out the physical properties of the samples.