Nickel(II) complexes with dicyanamide and tetramines

Four new pseudohalide complexes of the type [NiL{N(CN)(2)}(2)] (L = N(CH2CH 2NH2)(3), TAA; triethylenetetramine, TTA) and [NiL{N(CN)(2)}]ClO4 have been prepared and characterized by spectroscopic and magnetic methods. The X-ra y crystal structures of [Ni(TAA){N(CN)(2)}(2)] and [Ni(TTA){N(CN)(2)}(2)] h ave been determined, and analyses show that in both complexes the Ni ion po sseses distorted octahedral geometry. The temperature dependence of the mag netic susceptibility of [Ni(TTA){N(CN)(2)}](ClO4) was measured, but no anti ferromagnetic interaction was detected.