The Cu(II) complexes with bis(pyrazole-1-yl)methane and its derivatives: Synthesis, crystal structure, and magnetic properties

E. V. Lider, O. L. Krivenko, E. V. Peresypkina, A. I. Smolentsev, Yu G. Shvedenkov, S. F. Vasilevskii, L. G. Lavrenova

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Abstract

The procedures for the synthesis of the Cu(II) complexes with bis(pyrazole-1-yl)methane (L1), bis(3,5-dimethyl-4-bromopyrazole-1- yl)methane (L2), and bis(3,5-dimethyl-4-iodopyrazole-1-yl)methane (L3) of the composition Cu2(L1) 2Br4 (I), Cu2(L2)2Cl 4 (II), Cu(L3)(NO3)2 (III), and Cu(L3)(H2O)(NO3)2 • 2H 2O (IV) were developed. The organic ligands in the above complexes are coordinated to Cu(II) in a bidentate cyclic type through the N(2), N(2′) atoms of the pyrazole rings. The molecular and crystal structures of L2, L3, II, III, and IV were determined by X-ray diffraction. The study of the μeff(T) function in a temperature interval 2-300 K showed that compound I, which exhibited ferromagnetic exchange interactions in the chains, undergoes transition to antiferromagnetic state with weak ferromagnetism. The exchange antiferromagnetic interactions predominate in compound II.

Original languageEnglish
Pages (from-to)896-907
Number of pages12
JournalRussian Journal of Coordination Chemistry/Koordinatsionnaya Khimiya
Volume33
Issue number12
DOIs
Publication statusPublished - 1 Dec 2007
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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