Introduction
The study of the interaction between radiation and the matter is called spectroscopy. Molecules in an organic compound have the tendency to absorb specific frequencies according to their structural characteristics. These frequencies can be in the range of visible light, infrared or ultraviolet radiations.
The electrons in the molecules of an organic compound undergo transition when they absorb or emit light. This is the reason that the color perceived by the organic compounds depends on the absorption of light radiations in the visible range.
Infrared spectroscopy is very successful in organic chemistry. The types of bonds present in a compound as well as their lattice arrangements can be found by the absorption of IR radiations when they emit thermal radiations. The frequency at which the absorption of the radiation takes place matches the frequency of the vibrating bond.
Nuclear magnetic resonance spectroscopy analyzes the magnetic properties of certain atomic nuclei like hydrogen and carbon which determines their local environments in an organic compound through which the structure of the compound can be determined.
UV spectroscopy is used in highly conjugated organic compounds which absorb UV light or light in the visible regions. When electrons within the atoms are excited from one electronic state to another, their solutions show change in color based on changes in the wavelength due to absorption of visible light by the d electrons. Organic compounds with solvents may either have significant or weak UV absorptions because the pH value and polarity of the solvent do affect the absorption capability of the organic compound.
By passing a beam of IR light through a sample of organic compound the infrared spectrum of the sample can be recorded. On examining the light rays that are transmitted, we get to measure the quantity of energy absorbed at each wavelength. Absorption takes place when the IR frequency is equal to the frequency of the bond. Analysis of these absorption characteristics reveals details about the molecular structure of the sample.
The study of the interaction between radiation and the matter is called spectroscopy. Molecules in an organic compound have the tendency to absorb specific frequencies according to their structural characteristics. These frequencies can be in the range of visible light, infrared or ultraviolet radiations.
Description of organic chemistry spectroscopy
The electrons in the molecules of an organic compound undergo transition when they absorb or emit light. This is the reason that the color perceived by the organic compounds depends on the absorption of light radiations in the visible range.
Infrared spectroscopy is very successful in organic chemistry. The types of bonds present in a compound as well as their lattice arrangements can be found by the absorption of IR radiations when they emit thermal radiations. The frequency at which the absorption of the radiation takes place matches the frequency of the vibrating bond.
Nuclear magnetic resonance spectroscopy analyzes the magnetic properties of certain atomic nuclei like hydrogen and carbon which determines their local environments in an organic compound through which the structure of the compound can be determined.
UV spectroscopy is used in highly conjugated organic compounds which absorb UV light or light in the visible regions. When electrons within the atoms are excited from one electronic state to another, their solutions show change in color based on changes in the wavelength due to absorption of visible light by the d electrons. Organic compounds with solvents may either have significant or weak UV absorptions because the pH value and polarity of the solvent do affect the absorption capability of the organic compound.
By passing a beam of IR light through a sample of organic compound the infrared spectrum of the sample can be recorded. On examining the light rays that are transmitted, we get to measure the quantity of energy absorbed at each wavelength. Absorption takes place when the IR frequency is equal to the frequency of the bond. Analysis of these absorption characteristics reveals details about the molecular structure of the sample.
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