Abstract
A new compound, (NH 3CH 2CH 2NH 3) NiCl 4, has been prepared and investigated. Magnetism and powder X-ray diffraction photographs in combination with electronic and vibrational spectra indicate a weakly paramagnetic structure containing two-dimensional perovskite-type layers of tetragonally distorted cornersharing NiCl 6 octahedra. The unit cell dimensions are: a = 8.441 ± 0.001, b = 6.995 ± 0.001, c = 6.943 ± 0.001 Å, β = 92.925 ± 0.002°, in space group P2 1 c (C 5 2h), Z =2 . It is shown that this compound and the corresponding Pd compound belong to an isostructural family of crystals: (NH 3CH 2CH 2NH 3) MCl 4, M = Ni, Pd, Cu, Cd, Mn. The vibrational spectra of these compounds are discussed in relation to the structure.
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