Tetramethylethylenediamine(dimethyl)nickel(II) is the
organonickel complex with the formula (Me =
CH3). This yellow-brown, air-sensitive compound is popular precursor to diverse
organonickel complexes. It is prepared from the
tmeda
Tetramethylethylenediamine (TMEDA or TEMED) is a chemical compound with the formula (CH3)2NCH2CH2N(CH3)2. This species is derived from ethylenediamine by replacement of the four amine hydrogens with four methyl groups. It is a colorless liquid, ...
adduct of
nickel(II) acetylacetonate by reaction with
methyl lithium.
[{{cite journal , doi=10.1016/0022-328X(88)89050-8, title=Tmeda-Nickel-Komplexe , year=1988 , last1=Kaschube , first1=Wilfried , last2=Pörschke , first2=Klaus R. , last3=Wilke , first3=Günther , journal=Journal of Organometallic Chemistry , volume=355 , issue=1–3 , pages=525–532 ]
The tmeda ligand is easily displaced by bases such as
bipyridine and
diphosphines
Diphosphines, sometimes called bisphosphanes, are organophosphorus compounds most commonly used as bidentate phosphine ligand, phosphine ligands in inorganic chemistry, inorganic and organometallic chemistry. They are identified by the presence of ...
. Treatment of the complex with electrophilic alkenes results in elimination of ethylene, giving alkene complexes.
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References
Organonickel compounds