Infrared Spectroscopy 2.7 Flashcards
(10 cards)
What is electromagnetic radiation?
Electromagnetic radiation consists of an oscillating electric and magnetic field of a wide range of frequencies, approximately 10^11 - 10^24 Hz.
What is the speed of light in a vacuum?
In a vacuum, light travels at the speed of 3.00 × 10^8 m s^-1.
How is frequency measured?
Frequency is measured in Hertz (Hz).
What happens when a particular frequency of light is absorbed by a compound?
Its energy is transferred to the compound.
What do energies in infrared radiation correspond to?
Energies in infrared radiation correspond to the energies involved in covalent bond vibrations.
What is infrared spectroscopy?
Infrared spectroscopy is the study of how infrared radiation interacts with covalent bonds in molecules.
What determines the exact frequency of infrared vibration?
The exact frequency of the infrared vibration depends on the nature of the bond that is vibrating.
What happens to covalent bonds in response to infrared radiation?
Some covalent bonds respond to infrared radiation more than others, resulting in increased bending or stretching of the covalent bonds.
How are different bonds in a covalent molecule measured in terms of radiation absorption?
Different bonds absorb radiation of different frequencies, which are normally measured as wavenumbers (1/wavelength).
What is wavenumber?
Wavenumber is the reciprocal of the wavelength and it is measured in cm^-1.
