Structural investigations of nickel complexes with nitrogen and sulfur donor ligands (original) (raw)

1990, Inorganic Chemistry

The synthesis of five novel Ni(l1) complexes with N donor and/or thiolate S donor ligands and the structure of each compound are reported. Reaction of dichloro[tris(2-aminoethyl)amine]nickel(II), [Ni(tren)CI,], with sodium maleonitriledithiolate, Na2(mnt), yields a salt composed of the novel complex cation bis[tris(2-aminoethyI)amine]nickel(2+), [Ni(tren),12+, and bis(maleonitri1edithiolato)nickelate(2-), [Ni(mnt),12-. Crystals of a DMF disolvate of this salt, IeZDMF, crystallize in monoclinic space group P2,/n with cell dimensions a = 13.086 (2) A, b = 11.260 (3) A, c = 14.083 (2) A, 0 = 106.69 (I) O , V = 1988 (I) A3, and Z = 2. The cation contains two tridentate tren ligands in a facial arrangement. The anion is the familiar planar Ni(I1) complex with four S donor atoms. An independent synthesis of bis[tris(2-aminoethyl)amine]nickel(2+) tetrafluoroborate, [Ni(tren),](BF,), (2), confirms that the structure of the cation is not dependent on the anion in any way, and allows the electronic absorption spectrosco y of the cation to be examined in detail. Crystals of 2 form in the triclinic space group P i with cell dimensions a = 7.909 (I) fl, b = 8.788 (I) A, c = 8.919 (I) A, a = 108.45 (I)O, 0 = 96.32 (I)O, y = 104.03 (I)O,