tmeda-Nickel-Komplexe III. (N,N,N',N'-Tetramethylethylendiamin)-(dimethyl)nickel(II)

Article abstract of DOI:10.1016/0022-328X(88)89050-8

(tmeda)Ni(acac)2 reacts with the main group metal compounds (tmeda)Mg(CH3)2, (tmeda)2, and (C2H5O)Al(CH3)2 at 0 deg C to give (tmeda)Ni(CH3)2 (1), which can be isolated as fine yellow crystals in 50-80 percent yield.Complex 1, which is the simplest dialkyl nickel(II) compound with a hard donor ligand, is suprisingly stable and decomposes only at 79 deg C. 1 is converted by bipy to (bipy)Ni(CH3)2 and by Me2PC2H4PMe2 to (Me2PC2H4PMe2)Ni(CH3)2.Upon reaction of 1 with strong ?-acceptor molecules (acrylic acid methylester, methyl vinyl ketone, acrylonitrile, tetracyanoethene, tetrafluoroethene, maleic anyhdride) reductive elimination of the methyl groups takes place to give the complexes (tmeda)Ni(?-ligand)n (n=1,2) and ethane.