Abstract
Two heterometallic trinuclear complexes {[Cu(oxbp)]2Co(H2O)2}⋅1.5DMF⋅0.5H2O (complex 1) and {[Cu(oxbm)]2Co(H2O)2}⋅2DMF (complex 2) were obtained from the self-organization of two new dissymmetrical oxamidato-bridged copper(II) building blocks [Cu(oxbp)]− and [Cu(oxbm)]−[H3oxbp=N-benzoato-N'-(3-aminopropyl)oxamido, H3oxbm=N-benzoato-N'-(2-amino-2-methylethyl)oxamido, DMF=dimethylformamide]. The crystal structure of complex 1 has been determined. Complex 1 crystallize in triclinic system, space group P-1, a=8.0609(16) A, b=10.661(2) A, c=22.279(5) A, α=85.32(3), β=86.64(3), γ=70.90(3), and Z=1. The crystal structure of complex 1 consists of neutral trinuclear complex units, and hydrogen bond involved DMF and water molecules. Through the hydrogen bonds, weak coordination and Cu⋅⋅⋅Cu weak interactions, complex 1 features a 2-D supramolecular structure. Magnetic susceptibility measurements (5–100 K) indicate that the central Co(II) and terminal copper metal ions are antiferromagnetically coupled with J=−28.09 and J=−29.70 cm−1 for complex 1 and 2, respectively.
Published Version
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