IUPAC > Gold Book > alphabetical index > E > η (eta or hapto) in inorganic nomenclature
icon
(opens in a new window)


Indexes

η (eta or hapto)
in inorganic nomenclature
An affix giving a topological indication of the bonding between a π-electron ligand and the central atom in a coordination entity. A right superscript numerical index indicates the number of ligating atoms in the π-electron system of the ligand which bind to the central atom. Examples:
  1. [Fe(CO)3(C4H6SO)], tricarbonyl(η2-dihydrothiophene 1-oxide-κO)iron.
  2. [Cr(CO)4(C4H6)], tetracarbonyl(η4-2-methylene-1,3-propanediyl)chromium.
Source:
See also:
Blue Book, p. 465
PAC, 1994, 66, 1077 (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)) on page 1120
Interactive Link Maps
First LevelSecond LevelThird Level
GraphGraphGraph
Cite as: IUPAC Compendium of Chemical Terminology, Electronic version, http://goldbook.iupac.org/H01881.html.
Transformed and rewritten from PDF version (entry http://www.iupac.org/goldbook/H01881.pdf)
by: Miloslav Nic, Jiri Jirat, Bedrich Kosata, ICT Prague, Czech Republic
picture