TY - JOUR
T1 - Three Ni/Co(II) complexes with 4,4′-bipyridine and benzoic acid derivatives as mixed coligands
T2 - Hydrothermal syntheses, structures, and magnetisms
AU - Hu, De Xin
AU - Chen, Pang Kuan
AU - Luo, Feng
AU - Xue, Lin
AU - Che, Yunxia
AU - Zheng, Ji Min
PY - 2007/12/1
Y1 - 2007/12/1
N2 - The hydrothermal reactions of 3,5-dinitrobenzoic acid, or p-toluic acid, 4,4′-bipyridine, with transition metal chlorides in basified solvent gave rise to three coordination polymers, [Ni2(3,5-DNBC)4(4,4′-bpy)2(H2O)] (1), [Co(3,5-DNBC)2(4,4′-bpy)2] (2), [Co3(4,4′-bpy)(p-ToC)6] (3), and characterized by elemental analysis, IR, single-crystal X-ray diffraction and variable-temperature magnetic measurements. Compound 1 crystallizes in the monoclinic system, P21/c space group, the structure determination reveals that 1 has a 2D network based on lozenge grids, where each NiII is in 4O + 2N coordination mode. Compound 2 is also monoclinic system, P2/c space group, and the X-ray structural analysis shows that 2 also has a 2D network but based on rectangular grids with the CoII atom in a CoN2O4 environment. Compound 3 crystallizes in the triclinic system, P over(1, ̄) space group, and polymerizes through nitrogen and oxygen atoms giving 1D chains with the CoII(1) atom in a CoO6 environment and CoII(2) is in N + 4O coordination mode. In good agreement with the expected behavior, magnetic susceptibility measurements show weak ferromagnetic interactions for 1 and 3, whereas compound 2 exhibits moderate antiferromagnetic coupling.
AB - The hydrothermal reactions of 3,5-dinitrobenzoic acid, or p-toluic acid, 4,4′-bipyridine, with transition metal chlorides in basified solvent gave rise to three coordination polymers, [Ni2(3,5-DNBC)4(4,4′-bpy)2(H2O)] (1), [Co(3,5-DNBC)2(4,4′-bpy)2] (2), [Co3(4,4′-bpy)(p-ToC)6] (3), and characterized by elemental analysis, IR, single-crystal X-ray diffraction and variable-temperature magnetic measurements. Compound 1 crystallizes in the monoclinic system, P21/c space group, the structure determination reveals that 1 has a 2D network based on lozenge grids, where each NiII is in 4O + 2N coordination mode. Compound 2 is also monoclinic system, P2/c space group, and the X-ray structural analysis shows that 2 also has a 2D network but based on rectangular grids with the CoII atom in a CoN2O4 environment. Compound 3 crystallizes in the triclinic system, P over(1, ̄) space group, and polymerizes through nitrogen and oxygen atoms giving 1D chains with the CoII(1) atom in a CoO6 environment and CoII(2) is in N + 4O coordination mode. In good agreement with the expected behavior, magnetic susceptibility measurements show weak ferromagnetic interactions for 1 and 3, whereas compound 2 exhibits moderate antiferromagnetic coupling.
KW - 3,5-Dinitrobenzoic acid
KW - 4,4′-Bipyridine
KW - Magnetism
KW - p-Toluic acid
UR - http://www.scopus.com/inward/record.url?scp=36049017151&partnerID=8YFLogxK
U2 - 10.1016/j.ica.2007.03.038
DO - 10.1016/j.ica.2007.03.038
M3 - Article
AN - SCOPUS:36049017151
SN - 0020-1693
VL - 360
SP - 4077
EP - 4084
JO - Inorganica Chimica Acta
JF - Inorganica Chimica Acta
IS - 15
ER -