Anhydrous manganese hypophosphite dense framework solid: Synthesis, structure and magnetic studies

•Anhydrous Mn(II)-hypophosphite is synthesised by solvothermal route.•Mn(II)-hypophosphite is a dense 3-D framework with 1-D hexagonal channels.•Thermal decomposition of the framework leads to Mn2P2O7.•Neighbouring Mn(II) centres exhibit weak anti-ferromagnetic interactions.

Anhydrous manganese hypophosphite, [Mn(H2PO2)2]n·(DMF)0.11 (1) has been isolated under solvothermal conditions from the reaction of hypophosphorous acid (H3PO2) and MnCl2·4H2O in a mixture of DMF/EtOH/H2O (8:1:1; v/v) in 60% yield. The compound is characterized by FT-IR spectroscopy, thermogravimetric analysis, PXRD, single crystal X-ray diffraction data and magnetic measurements. The ligand occupies all the octahedral coordination sites around Mn(II) ions and forms a dense 3-D coordination polymer with hexagonal 1-D channels along [001] direction. The Mn(II) ions in the framework exhibit weak antiferromagnetic interactions.

Graphical abstractAnhydrous Mn(II)-hypophosphite 3-D framework with 1-D channels has been synthesised and structurally characterized. Thermolysis of the framework leads to the formation of stable Mn2P2O7. Mn(II) centres exhibit weak antiferromagnetic interactions.Figure optionsDownload full-size imageDownload as PowerPoint slide