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Gas electron diffraction
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<p>Gas electron diffraction (GED) is one of the applications of <a href="/facts/Electron_diffraction/IlFzQyVu">electron diffraction</a> techniques. The target of this method is the determination of the structure of gaseous molecules, i.e., the <a href="/facts/Molecular_geometry/7USG5zDn">geometrical arrangement of the atoms</a> from which a molecule is built up. GED is one of two experimental methods (besides microwave spectroscopy) to determine the structure of free molecules, undistorted by intermolecular forces, which are omnipresent in the solid and liquid state. The determination of accurate molecular structures by GED studies is fundamental for an understanding of <a href="/facts/Structural_chemistry/5vlGoj96">structural chemistry</a>. </p>