Syntheses and crystal structures of Sr7H12X2 (X = Cl, Br)

被引：14

作者：

Reckeweg, Olaf ^{[1
]}

Molstad, Jay C. ^{[1
]}

Levy, Scott ^{[1
]}

Hoch, Constantin ^{[2
]}

Disalvo, Francis J. ^{[1
]}

机构：

[1] Cornell Univ, Baker Lab, Dept Chem & Chem Biol, Ithaca, NY 14853 USA

[2] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany

来源：

ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES | 2008年 / 63卷 / 05期

关键词：

strontium; bromide; chloride; hydride; synthesis; structure elucidation; EUTAX calculations;

D O I：

10.1515/znb-2008-0506

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Dichroic, pink to blue single crystals of Sr7H12Cl2 and Sr7H12Br2 were obtained by reacting Sr with SrX2 or NaX and NaNH2 or NH4X (X = Cl, Br) as hydrogen sources in a Na melt at 900 degrees C for 12 h in silica-jacketed stainless-steel or Ta ampoules. The crystal structures of the new compounds were determined by means of single crystal X-ray diffraction. Both title compounds crystallize isotypically to Ba7Cl2F12 in the hexagonal space group P (6) over bar (no. 174) with the lattice parameters a = 998.06(3), c = 392.84(3) pm for Sr7H12Cl2 and a = 1004.62(3), c = 399.68(3) pm for Sr7H12Br2. The hydride positions taken from the difference Fourier map agree with those of the fluorides of the isotypic compound Ba7F12Cl12. The validity of our structural results is corroborated by EUTAX calculations and the comparison to SrH2, SrX2 and SrHX.

引用

页码：513 / 518

页数：6

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