Abstract
The tripod-like triphosphine (PPh 2CH 2CH 2) 3CCH 3, etp 3, forms with nickel(II) halides trinuclear complexes of formula [Ni 3X 6(etp 3) 2] (X = Cl, Br, I), where the etp 3 phosphine acts as trimetallic ligand, its three phosphorus atoms being linked to the three different nickel atoms. The chloroderivative has been studied by X-ray analysis, using diffractometer data. The crystal are monoclinic, space group P2 1/ a, a = 26.27(1), b = 28.84(2), c = 11.91(1), β = 99.0(2)°, d m = 1.36 g cm −3, d c = 1.354 g cm −3 for Z = 4. The structure has been solved by three-dimensional Patterson and Fourier syntheses and refined by least-squares techniques to final R and R w factors of 0.072 and 0.073 respectively. The complex molecule is trinuclear, with three four-coordinate nickel ions, bridging two etp 3 ligands.
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