Synthesis, Crystal Structure and Magnetic Properties of 1D Chain Complexes Based on Azo Carboxylate Oxime Ligand
oleh: Min Zeng, Xi Chen, Hui-Zhong Kou
| Format: | Article |
|---|---|
| Diterbitkan: | MDPI AG 2021-07-01 |
Deskripsi
Two carboxylate-bridged one-dimensional chain complexes, {[Mn<sup>II</sup>(MeOH)<sub>2</sub>][Fe<sup>III</sup>(L)<sub>2</sub>]<sub>2</sub>}<sub>n</sub> (1) and {[Mn<sup>II</sup>(DMF)<sub>2</sub>][Mn<sup>III</sup>(L)<sub>2</sub>]<sub>2</sub>·DMF}<sub>n</sub> (2) [H<sub>2</sub>L = ((2-carboxyphenyl)azo)-benzaldoxime], containing a low-spin [Fe<sup>III</sup>(L)<sub>2</sub>]<sup>−</sup> or [Mn<sup>III</sup>(L)<sub>2</sub>]<sup>−</sup> unit were synthesized. Magnetic measurements show that the adjacent high-spin Mn<sup>II</sup> and low-spin M<sup>III</sup> ions display weak antiferromagnetic coupling via the syn–anti carboxyl bridges, with <i>J</i> = −0.066(2) cm<sup>−1</sup> for complex 1 and <i>J</i> = −0.274(2) cm<sup>−1</sup> for complex 2.