Challenges in the synthetic routes to Mn(BH4)2: Insight into intermediate compounds

Nikolay A. Tumanov, Damir A. Safin, Bo Richter, Zbigniew Łodziana, Torben R. Jensen, Yann Garcia, Yaroslav Filinchuk

Research output: Contribution to journalArticle

Abstract

We have studied the reaction of MnCl2 with MBH4 (M = Li+, Na+, K+) in Et2O. Crystal structures of two new intermediates, named [{M(Et2O)2}Mn2(BH4)5] (M = Li+, Na+), were elucidated by X-ray diffraction. Mn(BH4)2 in a mixture with LiBH4 or NaBH4 forms upon the solvent removal in a vacuum. [{M(Et2O)2}Mn2(BH4)5] contains 2D layers formed by Mn and BH4 groups, linked through the alkali metal atoms coordinated to Et2O. The loss of the solvent molecules leads to the segregation of the partially amorphous or nanocrystalline LiBH4/NaBH4 and a creation of the 3D framework of the crystalline Mn(BH4)2. While using LiBH4 led to Mn(BH4)2 contaminated with LiCl, presumably due to an efficient trapping of the latter salt by the [Mn(BH4)2-Et2O] system, the reaction with NaBH4 produced chlorine-free Mn(BH4)2 accompanied with NaBH4. Using KBH4 led to the formation of K2Mn(BH4)4 as a second phase. Two pyridine-containing solvomorphs, [Mn(py)3(BH4)2] and [Mn(py)4(BH4)2]·2py, were isolated in pure form. However, Mn(BH4)2 partly decomposes upon removal of pyridine molecules. This journal is

Original languageEnglish
Pages (from-to)6571-6580
Number of pages10
JournalDalton Transactions
Volume44
Issue number14
DOIs
Publication statusPublished - 14 Apr 2015
Externally publishedYes

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Alkali Metals
Molecules
Chlorine
Salts
Crystal structure
Vacuum
Crystalline materials
X ray diffraction
Atoms
pyridine
potassium borohydride
manganese chloride

Cite this

Tumanov, N. A., Safin, D. A., Richter, B., Łodziana, Z., Jensen, T. R., Garcia, Y., & Filinchuk, Y. (2015). Challenges in the synthetic routes to Mn(BH4)2: Insight into intermediate compounds. Dalton Transactions, 44(14), 6571-6580. https://doi.org/10.1039/c4dt03807j
Tumanov, Nikolay A. ; Safin, Damir A. ; Richter, Bo ; Łodziana, Zbigniew ; Jensen, Torben R. ; Garcia, Yann ; Filinchuk, Yaroslav. / Challenges in the synthetic routes to Mn(BH4)2 : Insight into intermediate compounds. In: Dalton Transactions. 2015 ; Vol. 44, No. 14. pp. 6571-6580.
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Tumanov, NA, Safin, DA, Richter, B, Łodziana, Z, Jensen, TR, Garcia, Y & Filinchuk, Y 2015, 'Challenges in the synthetic routes to Mn(BH4)2: Insight into intermediate compounds', Dalton Transactions, vol. 44, no. 14, pp. 6571-6580. https://doi.org/10.1039/c4dt03807j

Challenges in the synthetic routes to Mn(BH4)2 : Insight into intermediate compounds. / Tumanov, Nikolay A.; Safin, Damir A.; Richter, Bo; Łodziana, Zbigniew; Jensen, Torben R.; Garcia, Yann; Filinchuk, Yaroslav.

In: Dalton Transactions, Vol. 44, No. 14, 14.04.2015, p. 6571-6580.

Research output: Contribution to journalArticle

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T1 - Challenges in the synthetic routes to Mn(BH4)2

T2 - Insight into intermediate compounds

AU - Tumanov, Nikolay A.

AU - Safin, Damir A.

AU - Richter, Bo

AU - Łodziana, Zbigniew

AU - Jensen, Torben R.

AU - Garcia, Yann

AU - Filinchuk, Yaroslav

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