Preferred Label : η (eta or hapto);
Detailed label : η (eta or hapto) in inorganic nomenclature;
IUPAC definition : 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: ol li [Fe(CO) sub 3 /sub (C sub 4 /sub H sub
6 /sub SO)], tricarbonyl(η sup 2 /sup -dihydrothiophene 1-oxide-κ i O /i )iron. /li
li [Cr(CO) sub 4 /sub (C sub 4 /sub H sub 6 /sub )], tetracarbonyl(η sup 4 /sup -2-methylene-1,3-propanediyl)chromium.
/li /ol div class 'sources' b em Source: /em /b br/ Red Book, 3rd ed., p.
202 (https://doi.org/10.1515/pac-2014-0718) br/ /div ;
Origin ID : H01881;
See also
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: ol li [Fe(CO) sub 3 /sub (C sub 4 /sub H sub
6 /sub SO)], tricarbonyl(η sup 2 /sup -dihydrothiophene 1-oxide-κ i O /i )iron. /li
li [Cr(CO) sub 4 /sub (C sub 4 /sub H sub 6 /sub )], tetracarbonyl(η sup 4 /sup -2-methylene-1,3-propanediyl)chromium.
/li /ol div class 'sources' b em Source: /em /b br/ Red Book, 3rd ed., p.
202 (https://doi.org/10.1515/pac-2014-0718) br/ /div
