A Cobalt(II) Complex Based on 5-Methoxyisophthalic Acid and 1,6-Bis(1,2,4-triazol-1-yl)hexane: Synthesis, Crystal Structure and Magnetic Properties

Abstract

A new cobalt(II) complex, [Co₂(CH₃O-ip)₂(1,6-bth)₂] _n (1), (CH₃O-H₂ip = 5-methoxyisophthalic acid, 1,6-bth = 1,6-bis(1,2,4-triazol-1-yl)hexane), has been synthesized through hydrothermal reaction and further characterized by elemental analysis, IR spectra. The X-ray single-crystal structure shows that complex 1 crystallizes in the triclinic space group Pī with a = 9.9118(10), b = 10.1196(10), c = 11.9346(12) Å, α = 67.0660(10) β = 78.1280(10), γ = 71.1160(10)°, V = 1038.76(18) ų, C₁₉H₂₂CoN₆O₅, M_r = 473.36, Z = 2, D_c = 1.513 g·cm³, μ(MoKα) = 0.871 mm^–1, F(000) = 490, R = 0.0242, and wR = 0.0641 for 3,841 observed reflections with I > 2σ(I). The adjacent Co ions are bridged by CH₃O-ip to form a 1D chain. The 1D chains are further connected by 1,6-bth to generate a 3D network with (3,5)-connected (4²·6)(4²·6⁵·8³) topology. Variable-temperature magnetic susceptibility measurements indicate the occurrence of weak ferromagnetic properties between adjacent Co ions at high temperature.

Supplemental materials are available for this article. Go to the publisher's online edition of Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry to view the supplemental file.

Keywords:

• 1
• 6-bis(1
• 2
• 4-triazol-1-yl)hexane
• 5-methoxyisophthalic acid
• cobalt(II) complex
• magnetic properties