Dinuclear 2,2'-biallyl nickel complexes containing square-planar nickel(I): crystal structure of μ(η3;3-(CH2)2CC(CH2)2)-trans-2 (dad = biacetylbis(2,6-dimethylphenylimine))

Article abstract of DOI:10.1016/0022-328X(90)80245-U

Diazadiene nickel butadiene complexes react with allene in a 1 : 1 ratio to give paramagnetic complexes 2, of composition (dad)Ni(C3H4).A single-crystal structure determination in the case of 2a has revealed the presence of a planar bridging tetramethyleneethane (2,2'-biallyl) ligand to which two (dad)Ni fragments are coordinated on opposite sides.The complex can be regarded as containing two intependent nickel(I) centres, each having a square-planar coordination geometry.