The chemical structure reflects the structure at the molecular or ionic level of a uniform ( homogeneous ) substance. It indicates how atoms, groups of atoms, ions and bonds or lone pairs of electrons are spatially arranged. Specifically, the constitution, configuration and conformation describe the structure of the molecular and crystal lattice the structure of ionic compounds. To draw them are different chemical formulas and models, such as space-filling or ball - and-stick models, are used. Information about the structure of a compound is often in accordance with the rules of chemical nomenclature, contained in their name. Modern databases, however, work with unique structure codes such as InChI, SMILES or WLN. With the elucidation of the chemical structure of the subject of structural chemistry.
The structure elucidation of molecules is made in the structural analysis today with various instrumental methods.
- X-ray diffraction and X-ray diffraction
- Electron diffraction and neutron diffraction
- Mass spectrometry
- Vibrational spectroscopy, in particular infra-red and Raman spectroscopy