Alpha

Name:
Alpha
Detailed information:
(α). (1) A prefix denoting the position of a substituting atom or group in an organic compound. The Greek letters α, β, γ, etc., are usually not identical with the IUPAC numbering system 1, 2, 3, etc., since they do not start from the same carbon atom. However, α and β are used with naphthalene ring compounds to show the 1 and 2 positions, respectively. α, β, etc., are also used to designate attachment to the side chain of a ring compound.(2) Both a symbol and a term used for relative volatility in distillation.(3) Symbol for optical rotation.(4) A form of radiation consisting of helium nuclei.See Alpha Particle. (5) The major allotropic form of a substance, especially of metals, e.g., α-iron.