Molecular Crystals and Liquid Crystals, Vol.376, 39-46, 2002
Crystal structure and magnestism of [Ni(dmit)(2)](-) salts with supramolecular cations of M+ (15-crown-5)
The crystals of M+(15-crown-5)(2)[Ni(dmit)(2)] (M+ = K+ (1), Rb+ (2) and NH4+ (3)) were prepared, In the crystal, M+ and 15-crown-5 formed a barrel-shape supramolecular cation structure, which filled the space between the [Ni(dmit)(2)](-) layers. The [Ni(dmit)(2)](-) formed the pi - pi dimers which were connected through the side-by-side S similar to S contacts. The interactions between [Ni(dmit)(2)](-) within the dimer were not strong enough and the crystals showed Curie-Weiss magnetic susceptibility with the Weiss temperature theta of -3.8, -2.8 and -3.2 K for the salts 1, 2 and 3, respectively.