Abstract
Two coordination polymers, Cu(bipy)(DBrS) 1 and Co(bipy)(H2O)2(DBrS) 2 with bipy = 2,2′-bipyridine, H2DBrS = meso-2,3-dibromosuccinic acid represent rare examples of metal complexes with meso-2,3-dibromosucciniato ligand. Within 1, the CuN2O4 octahedra are interlinked by DBrS2− anions in a μ 2-κ 2ΟΟ′:κ 2Ο″Ο″′ coordination mode to form \({}_{\infty }^{1}\)[Cu(bipy)(DBrS)2/2] chains, which are further assembled into 2D supramolecular layers by interchain π···π stacking interactions. In 2, the six-coordinated Co2+ ions are bridged by DBrS2− anions in a μ 2-κΟ:κΟ′ fashion to form \({}_{\infty }^{1}\)[Co(bipy)(H2O)2(DBrS)2/2] polymer chains and the adjacent 1D chains interconnected by weak C–H···O hydrogen bonds to construct 2D supramolecular layers. The temperature-dependent magnetic susceptibility shows that 2 obeys Curie–Weiss law χ m = C/(T − Θ) with C = 2.16 cm3 K mol−1 and Θ = −0.40 K and the best fit gave a weak antiferromagnetic coupling (J = −0.89 cm−1) among Co2+ ions. Results about infrared spectra and elemental analyses are also presented.
Graphical Abstract
In the present paper, we have discussed the syntheses and crystal structures of two metal–organic based 1D polymers of Cu(II) and Co(II) respectively, and magnetic behavior in the temperature range 2–300 K of the Co(II) compound. The compounds feature 1D chains based on bridging dibromosucciniato. The Cu(II) compound represents the first example of meso-2,3-dibromosuccinic acid coordination polymers that exhibit μ 2-κ 2ΟΟ′:κ 2Ο″Ο″′ coordination mode.
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Acknowledgments
This project was supported by the Open Foundation from Application of nonlinear Science and Technology in the Most Important Subject of Zhejiang (Grant No. xkzl2006). The honest thanks are also extended to K. C. Wong Magna Fund in Ningbo University.
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Jiang, F., Weng, WD., Zheng, YQ. et al. New 1D Metal–Organic Coordination Polymers: Syntheses, Crystal Structures and Properties of Cu(bipy)(DBrS) 1, Co(bipy)(H2O)2(DBrS) 2, with H2DBrS=HOOC–(CHBr)2–COOH. J Chem Crystallogr 45, 134–141 (2015). https://doi.org/10.1007/s10870-015-0574-2
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DOI: https://doi.org/10.1007/s10870-015-0574-2