MAGNETIC PROPERTIES OF NEW COMPLEXES OF 3
d METAL CHLORIDES WITH 3-AMINO-4-ETHOXYCARBONYLPYRAZOLE
L. G. Lavrenova1, A. S. Zhilin1, A. S. Bogomyakov2, L. A. Sheludyakova1, A. V. Alekseev1, S. F. Vasilevskii3
1A. V. Nikolaev Institute Of Inorganic Chemistry, Siberian Division, Russian Academy Of Sciences, Novosibirsk
2International Tomography Center, Siberian Division, Russian Academy Of Sciences, Novosibirsk
3V. V. Voevodsky Institute Of Chemical Kinetics And Combustion, Siberian Division, Russian Academy Of Sciences, Novosibirsk
Keywords: synthesis, complexes, 3d metals, 3-amino-4-ethoxycarbonylpyrazole, magnetochemistry, electronic and IR spectroscopy
Abstract
New complexes of Co(II), Ni(II), and Cu(II) chlorides with 3-amino-4-ethoxycarbonylpyrazole (L) of the composition ML2Cl2 are synthesized. The compounds are studied by powder X-ray diffraction, electronic and IR spectroscopy, static magnetic susceptibility (temperature range 2-300 K). It is found that in the ML2Cl2 complexes (М = Co(II), Ni(II), Cu(II)) ferromagnetic exchange interactions between the unpaired electrons of metal ions occur. In [CoL2Cl2] and [NiL2Cl2] compounds a transition to the magnetically ordered state ( Тс ≈ 10-12 K) is observed.
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