Cyanide-bridged Fe^III–Mn^III bimetallic chain derived from [Fe(bipy)(CN)₄]⁻: synthesis, structure and magnetic characteristics

Abstract

A chain-like compound of [Mn(salpn)][Fe(bipy)(CN)₄] (1) (salpn = N,N′-propylenebis(salicylideneiminato)dianion; bipy = 2,2′-bipyridine), assembled from building blocks of [Fe(bipy)(CN)₄]⁻ and [Mn(salpn)]⁺, has been characterized by elemental analyses, ICP, IR, thermoanalysis, single crystal X-ray structure analysis and magnetic measurements. In 1, each [Fe(bipy)(CN)₄]⁻ anion coordinates with two [Mn^III(salpn)]⁺ cations via two trans-CN⁻ groups, and each [Mn^III(salpn)]⁺ cation is axially coordinated by two [Fe(bipy)(CN)₄]⁻ ions, resulting in a straight 1-D chain. The chains stack via aromatic π–π-type interactions. Magnetic studies reveal the presence of weak antiferromagnetic interactions between adjacent Fe^III and Mn^III ions through cyanide-bridges.

Keywords:

• Cyanide-bridged
• Crystal structure
• Magnetic properties
• Iron
• Manganese

Acknowledgements

Thanks for financial support from the National Natural Science Foundation of China (No. 20875039) and the Foundation of State Key Laboratory of Coordination Chemistry.