Heterolysis

Heterolysis

In chemistry, heterolysis or heterolytic fission (from Greek ἑτερος, "heteros," "different," and λυσις, "lusis," "loosening") is chemical bond cleavage of a neutral molecule generating a cation and an anion. [IUPAC Compendium of Chemical Terminology, 2nd Edition (1997): http://www.iupac.org/goldbook/H02809.pdf] In this process the two electrons that make up the bond are assigned to the same fragment.

: A:B longrightarrow A^{+} + B^-

The energy involved in this process is called heterolytic bond dissociation energy. Bond cleavage is also possible by a process called homolysis. In heterolysis additional energy is required to separate the ion pair. An ionising solvent helps reduce this energy.

In biology, heterolysis refers to necrosis induced by hydrolytic enzymes from surrounding (usually inflammatory) cells. Autolysis is necrosis of a cell by its own enzymes.

ee also

* Homolysis

References


Wikimedia Foundation. 2010.

Игры ⚽ Нужен реферат?

Look at other dictionaries:

  • heterolysis — [het΄ər äl′ə sis] n. 〚 HETERO + LYSIS〛 1. the destruction of cells of one species by lysins or enzymes derived from cells of a different species 2. Chem. the breakdown of a compound into two particles with opposite charges heteroly …   Universalium

  • heterolysis — [het΄ər äl′ə sis] n. [ HETERO + LYSIS] 1. the destruction of cells of one species by lysins or enzymes derived from cells of a different species 2. Chem. the breakdown of a compound into two particles with opposite charges heterolytic… …   English World dictionary

  • heterolysis — noun Etymology: New Latin Date: 1938 decomposition of a compound into two oppositely charged particles or ions • heterolytic adjective …   New Collegiate Dictionary

  • heterolysis — n. [Gr. heteros, different; lysis, loosen] Disintegration of a cell or tissue by an external agent, either by lysins or enzymes; see autolysis …   Dictionary of invertebrate zoology

  • heterolysis — noun a) In organic chemistry, the splitting of a molecule to form a pair of oppositely charged ions b) The disruption of blood cells by a heterolysin, or by enzymes from anoth …   Wiktionary

  • heterolysis — Dissolution or digestion of cells or protein components from one species by a lytic agent from a different species. [hetero + G. lysis, a loosening] * * * het·ero·ly·sis .het ə räl ə səs, ə rə lī səs n, pl ly·ses .sēz …   Medical dictionary

  • heterolysis — n. dissolution of cells; splitting of a single molecule into two oppositely charged ions (Chemistry) …   English contemporary dictionary

  • heterolysis — het·er·ol·y·sis …   English syllables

  • heterolysis — /hɛtəˈrɒləsəs/ (say hetuh roluhsuhs) noun the unequal breakage of a chemical bond to give charged fragments. Compare homolysis. {hetero + lysis} …  

  • heterolysis — …   Useful english dictionary

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”