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1 Polish Journal of Chemistry

1 2003

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Kinetic, Spectroscopic and Magnetic Properties of 1,4,8,11-Tetraazacyclotetradecanenickel Bi- and Trivalent Complexes

Banaś B., Nahorska M., Korybut-Daszkiewicz B, Mroziński J.

Polish Journal of Chemistry

2003

Vol. 77 / nr 1

21-29

Nickel(II) and nickel(III) complexes of formula [NiIILCl2] and [NiIIILCl2]+ containing tetraaza macrocyclic ligands with nitrogen donor atoms, where L = [14]aneN4 (L1), 2-Me[14]aneN4 (L2), 5,12-Me2[14]aneN4(L3), 5,7,7,12,14,14-Me6[14]aneN4 (L4), form stable crystals with a pseudo-octahedral geometry of central atom. This work concerns the methyl analogues of Ni(II) and Ni(III) complexes. Magnetic and spectroscopic measurements gave values of spectroscopic parameter g and paramagnetic temperature dependence characteristic for this type of compounds. Their properties were investigated using EPR, reflectance spectroscopy and IR techniques. The Faraday method was used for the investigation of magnetic susceptibility between 4.2-300 K.