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2 Polish Journal of Chemistry

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Syntheses and Structure of Ni(III) Complexes with 1-Toulene-3,4-dithiole. Bond-Valence Approach to the Oxidation State of the Central Atom

Kameniček J., Valach F., Kratochvil B., Žak Z.

Polish Journal of Chemistry

2002

Vol. 76 / nr 4

483-490

The complex compounds of the formula (R)[NiIII(tdt)2], R = Met4N (I), Et4N (II), Pr4N (III), MePh3P (IV), Ph4P (V); tdt = 1-toluene-3,4-dithiole have been synthesized. The crystal structures of the compounds III and IVwere determined by X-rays studies. Bond valence as a function of inter-nuclear distance for Ni-S bonds was estimated. On the basis of physico-chemical measurements and bond-valence sum model, the formal oxidation state III of Ni atoms for both structures was proposed.

Nickel(II)morpholinedithiocarbamate with Mixed P,P-Ligands

Pastorek R., Kameniček J., Šindelář Z., Žák Z.

Polish Journal of Chemistry

2001

Vol. 75, nr 3

363-369

Ni(II)morpholinedithiocarbamate complexes with P,P-ligands in the coordination sphere of composition [Ni(morphdtc)(P,P)]X and [Ni2(morphdtc)2X2(P,P)], resp. [(X = NCS-, ClO4 _, I-; P,P = 1,2-bis(diphenylphosphino)ethane (dppe), 1,4-bis(diphenylphosphino) butane (dppb), 1,6-bis(diphenylphosphino)hexane (dpph), 1,1_-bis(diphenylphosphino) ferrocene (dppf); morph = C4H8O; dtc = S2CN-)] have been isolated. These complexes have been characterized by elemental analysis, IR and UV-VIS spectroscopy, thermal analysis, magnetochemical and conductivity measurements. X-ray structural analysis of [Ni(morphdtc)(dppf)]ClO4_C2H5OH confirms the NiS2P2 chromophore with a slightly distorted square arrangement around central atom.