Synthesis, structures and magnetic properties in 3d-electron-rich isostructural complexes based on chains with sole syn-anti carboxylate bridges

Dalton Transactions : an International Journal of Inorganic Chemistry
Feng SuYuhui Dong

Abstract

To evaluate magnetic properties of isostructural compounds, a series of 3D carboxylate coordination polymers [M(H2bpta)]n, (H4bpta = 2,2',4,4'-biphenyltetracarboxylic acid, M = Fe(II) (1), Ni(II) (2), Cu(II) (3) and Zn(II) (4)), was synthesized in H2O-CH3CN or H2O solvents, respectively. Structurally, complexes 1-4 have isostructural features with (5,5)-connected 3D framework, wherein the M(II) centre takes an octahedral coordination environment consisting of six oxygen atoms from carboxylates of ligands. The M(II) sites are linked by syn-anti carboxylates to form chains with an M···M separation of 4.880(2) (M = Fe), 4.784(2) (M = Ni), 4.541(2) (M = Cu), and 4.607(2) Å (M = Zn), respectively. The shortest M···M distances between interchains locate 9.122(4), 9.077(3), 9.361(3), and 8.767(2) Å, respectively. Magnetically, the isostructural polymers show different magnetic behaviors due to different spins of central ions. Theoretical analysis indicates that couplings between magnetic ions obey uniform chain models. The magnetic susceptibility of 1 and 2 are perfectly fitted by the modified Fisher model to yield an effective intra-chain exchange coupling constant of -0.81(1) and 3.67(2) cm(-1), respectively. For 3, a Heisenberg fer...Continue Reading

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Citations

Jan 5, 2016·Dalton Transactions : an International Journal of Inorganic Chemistry·G RousseH Ahouari
May 18, 2016·Dalton Transactions : an International Journal of Inorganic Chemistry·Ya-Hui LiuFeng Su
Jun 14, 2016·Dalton Transactions : an International Journal of Inorganic Chemistry·Teng LiYan-Zhen Zheng
Aug 4, 2016·Acta Crystallographica. Section C, Structural Chemistry·Li Yang ZhangSi Si Feng
Aug 20, 2016·Dalton Transactions : an International Journal of Inorganic Chemistry·G Rousse, J Rodríguez-Carvajal
Sep 8, 2018·Acta Crystallographica. Section C, Structural Chemistry·Shao Dong LiMiao Li Zhu

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