摘要：

The preparation and properties of the crystalline compounds [Ni( naptu)4Cl2] (naptu = 1-(1-naphthyl)-2-thiourea), [Ni(naptu)2X2] (X = Br or I), Ni(etu)4X2 (X = Cl, Br, I, ClO4, or NO3; etu = ethylenethiourea), and [Ni(etu)6](ClO4)2 are described. The chloro and bromo etu complexes exist in both yellow and orange forms which are considered to be geometric isomers of octahedral nickel. [Ni(naptu)4Cl2] and [Ni(etu)6](ClO4)2 are octahedral, while [Ni(naptu)2Br2] and [Ni(naptu)2I2] are tetrahedral. The iodo etu complex is shown to be six-coordinate though diamagnetic. The compound [Ni(etu)4](ClO4)2 is square-planar as is crystalline [Ni-(etu)4](NO3)2. In solution, however, all of the compounds lose ligand and retain coordinated anion. Assignment of stereochemistry is made in conjunction with spectral, magnetic, molecular weight, and X-ray powder data.

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