The Kläui ligand is the anion
−. The
ligand
In coordination chemistry, a ligand is an ion or molecule with a functional group that binds to a central metal atom to form a coordination complex. The bonding with the metal generally involves formal donation of one or more of the ligand's el ...
, popularized by Wolfgang Kläui, binds metals and
metalloid
A metalloid is a chemical element which has a preponderance of material property, properties in between, or that are a mixture of, those of metals and Nonmetal (chemistry), nonmetals. The word metalloid comes from the Latin language, Latin ''meta ...
s via a facial O
3 donor set. Related
tridentate and
tripodal anionic ligands include
trispyrazolylborates.
:
160px, General structure of a metal center (MLn) coordinated to a κ3-Kläui ligand.
The ligand is derived from the cationic complex of
trimethylphosphite 2+ via an
Arbuzov reaction. Using other
phosphite
The general structure of a phosphite ester showing the lone pairs on the P
In organic chemistry, a phosphite ester or organophosphite usually refers to an organophosphorous compound with the formula P(OR)3. They can be considered as esters of ...
s and other
cyclopentadienyl Cyclopentadienyl can refer to
* Cyclopentadienyl anion, or cyclopentadienide,
** Cyclopentadienyl ligand
* Cyclopentadienyl radical, •
* Cyclopentadienyl cation,
See also
* Pentadienyl
{{Chemistry index ...
ligands, a large variety of derivatives are possible. The parent acid H is highly soluble in water (270 g/100 mL). Its p''K''
a is about 2. Many complexes have been described, including bis(
chelate) complexes of the type {M
(C5H5)Co[(CH3O)2POsub>3}
2]
n+ (M = Co(II), Mn(II), Bi(III), etc.).
[Wolfgang Kläui, Heiko Otto, Werner Eberspach, Elke Buchholz "Die Michaelis-Arbusov-Reaktion als Zugang zu neuen Sauerstoff-Tripodliganden des Typs 5R5M{P(O)(OCH3)2}3sup>−. Ligandfeldspektroskopische und koordinationschemische Charakterisierung der Liganden" Chemische Berichte 1982, Volume 115, Pages 1922–1933. ]
References
{{DEFAULTSORT:Klaui Ligand
Organocobalt compounds
Half sandwich compounds
Cyclopentadienyl complexes
Phosphites
Tripodal ligands