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Complexes of Nickel with Heterocyclic Dithiocarbamates and Triphenylphosphine as Mixed π-Acceptor Ligands

R. Pastorek, J. Kameníček, F. Březina, M. Hamrusová, Z. Šindelář, and J. Lasovský

Department of Inorganic and Physical Chemistry, Faculty of Natural Sciences, Palacký University, CS-771 47 Olomouc


Abstract: The new complex compounds of bivalent nickel with heterocyclic dithiocarbamates (dtc) and triphenylphosphine (PPh3) as mixed π-acceptor ligands of composition NiX(Rdtc)(PPh3) (X = Cl-, Br-, I-; R = morph (C4H8O), pip (C5H10); dtc = S2CN-; PPh3 = C18H15P) have been isolated. By the X-ray analysis of the model complex NiBr(morphdtc)(PPh3) the distorted square-planar coordination around of nickel (NiS2BrP) was detected. The monocrystal is triclinic - basic data are as follows: space group of symmetry P ($) over bar 1, a = 9.765(2) Ả, b = 10.943(3) Ả, c = 13.008(3) Ả, α=112.18(2)°,  β= 90.89(2)°,  γ = 109.18(2)°, V = 1200.1 Ả3, Z = 2, ρx-rayexp = 1.558/1.55 g cm-3, R = 5.3 %. By oxidation of initial Ni(II) complexes by bromine the Ni(III) complexes of the composition NiX(Rdtc)Br have been isolated. All the prepared complexes were studied by X-ray diffractograms, magnetochemical measurements, thermogravimetric methods, conductivity measurements, IR and VIS spectroscopy and for Ni(II) complexes the method of cyclic voltammetry was used.

Full paper in Portable Document Format: 474a210.pdf


Chemical Papers 47 (4) 210–214 (1993)

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