A convenient method for the synthesis of alkali metal pentafluoromanganates(III)

Bhattacharjee, Manabendra N. ; Chaudhuri, Mihir K. ; Dasgupta, Himadri S. ; Kathipri, Athili ; Khathing, Darlando T. (1982) A convenient method for the synthesis of alkali metal pentafluoromanganates(III) Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry, 12 (5). pp. 485-492. ISSN 1553-3174

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Related URL: http://dx.doi.org/10.1080/00945718208082608

Abstract

Reaction of MnO(OH) and a concentrated solution of AHF2 (A = NH4+, Na+, K+ or Cs+) in 40% hydrofluoric acid gives instantaneously rose-pink coloured alkali metal pentafluoromanganate(III), A2MnF5 (A = NH4+ or Na+), and alkali metal pentafluoromanganate(III) monohydrate, A2MnF5.H2O (A = K+ or Cs+). Li2MnF5 has been synthesised by reacting lithium carbonate with a solution of MnO (OH) in 40% hydrofluoric acid followed by addition of a small amount of alcohol. Characterisation of the compounds and assignment of molecular structure were made from the elemental analyses, chemical determination of oxidation state of manganese in the compounds, magnetic susceptibility measurements and infra red spectral studies.

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