TY - JOUR
T1 - The Cu(II) complexes with bis(pyrazole-1-yl)methane and its derivatives
T2 - Synthesis, crystal structure, and magnetic properties
AU - Lider, E. V.
AU - Krivenko, O. L.
AU - Peresypkina, E. V.
AU - Smolentsev, A. I.
AU - Shvedenkov, Yu G.
AU - Vasilevskii, S. F.
AU - Lavrenova, L. G.
PY - 2007/12/1
Y1 - 2007/12/1
N2 - 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.
AB - 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.
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U2 - 10.1134/S1070328407120056
DO - 10.1134/S1070328407120056
M3 - Article
AN - SCOPUS:37549065495
VL - 33
SP - 896
EP - 907
JO - Russian Journal of Coordination Chemistry/Koordinatsionnaya Khimiya
JF - Russian Journal of Coordination Chemistry/Koordinatsionnaya Khimiya
SN - 1070-3284
IS - 12
ER -