SYNTHESIS, CRYSTAL STRUCTURE, MAGNETIC PROPERTY, AND N2-GAS-ADSORPTION PROPERTY OF DINUCLEAR COPPER(II) 3,4,5-TRIMETHOXYBENZOATE

Abstract

Copper(II) 3,4,5-trimethoxybenzoate, [Cu₂(3,4,5-(CH₃O)₃C₆H₂CO₂)₄ (CH₃OH)₂]·2DMF, was prepared and characterized by elemental analysis, infrared and UV-vis spectra and temperature dependence of magnetic susceptibilities (4.5—300 K). The crystal structure was determined by the single-crystal X-ray diffraction method. It crystallizes in the triclinic space group P1(_) with a = 8.2110(13) Å, b = 13.181(2) Å, c = 13.409(2) Å, α = 97.967(3)°, β = 102.378(3)°, γ = 105.009(3)°, V = 1339.8(4) ų, D_x = 1.465 g/cm³, and Z = 1. The R1 [I > 2σ(I)] and wR2 (all data) values are 0.0363 and 0.0816, respectively, for all 5991 independent reflections. The crystal contains crystallographically centrosymmetric dinuclear molecule with axial methanol molecules and crystal DMF molecules [Cu···Cu 2.6190(6) Å]. Magnetic susceptibility data show a considerable antiferromagnetic interaction between the two copper(II) ions (2J = –292 cm^–1). Gas-adsorption behavior was investigated for N₂.

Keywords

• Dinuclear copper complex
• crystal structure determinations
• nitrogen gas absorption property

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