CRYSTAL-STRUCTURE, THERMAL-DECOMPOSITION AND VIBRATIONAL-SPECTRUM OF ETHYLENEDIAMMONIUM-PENTAFLUOROMANGANATE(III), ENH2MNF5

被引：11

作者：

BENTRUP, U

SCHRODER, L

MASSA, W

机构：

[1] UNIV MARBURG, FACHBEREICH CHEM, W-3550 MARBURG, GERMANY

[2] WISSENSCH ZENTRUM MAT WISSENSCH, W-3550 MARBURG, GERMANY

来源：

ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES | 1992年 / 47卷 / 06期

关键词：

MANGANESE(III) FLUORO COMPLEX; FLUOROMANGANATE(III); CRYSTAL STRUCTURE; THERMAL ANALYSIS; HYDROGEN BONDS;

D O I：

10.1515/znb-1992-0606

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Single crystals of enH2MnF5 (en = ethylenediamine) have been prepared from aqueous HF solution and the crystal structure was determined by X-ray diffraction: space group Cccm. Z = 16, a = 1710.5(4), b = 1799.2(4), c = 847.8(2) pm, R/WR = 0.040/0.028 for 977 reflections. The structure consists of kinked [MnF5]2 chains built by MnF6 octahedra sharing trans vertices (angles Mn-F-Mn 161.2 and 157.8-degrees). The bridging Mn-F(ax) bonds are strongly elongated by the Jahn-Teller effect (mean Mn- F(ax) 215.4, Mn-F(eq) 183.8 pm). Each of the enH2(2+) cations is connected to four anionic chains by hydrogen bonds forming a 3 D network. Thermal decomposition occurs between 200 and 380-degrees-C in two steps giving finally MnF2. The IR spectra of enH2MnF5 and its decomposition products are reported.

引用

页码：789 / 794

页数：6

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