Synthesis, crystal structure and magnetic properties of a three-dimensional cyano-bridged heterometallic complex of manganese(II) and molybdenum(IV)

Abstract

A bimetallic cyano-bridged complex {[Mn(ImH)(H₂O)₂]₂[Mo(CN)₈]·4H₂O} _n (ImH = imidazole) has been prepared and characterized. Single-crystal X-ray analysis reveals that the complex crystallizes in space group C2/c with a = 15.665(2), b = 14.616(2), c = 12.307(2) Å, α = 90, β = 108.31(1), γ = 90°. The structure of the complex demonstrates a three-dimensional network through cyano-bridges. Each Mo(IV) atom has six –CN–Mn linkages and two terminal cyano ligands arranged in a square antiprismatic arrangement. The Mn(II) atom is in a distorted octahedral environment formed by three MoCN → Mn linkages along with one imidazole and two water molecules in cis configuration. Variable temperature magnetic susceptibility shows an antiferromagnetic coupling between Mn²⁺ ions through the NC–Mo^IV–CN diamagnetic bridges within the three-dimensional network. The IR spectra have also been investigated.

Keywords:

• Manganese(II)
• Molybdate(IV)
• Cyano-bridge
• Crystal structure
• Magnetic properties

Acknowledgements

We express our gratitude to the Zhejiang Provincial Natural Science Foundation of China for financial Support through Project No. M203077 and the Foundation of Hangzhou Teachers College of China.