Synthesis, crystal structure and optical spectra of Yb2[CN2]3

被引：0
|
作者：
Reckeweg, Olaf [1 ]
Schleid, Thomas
DiSalvo, Francis J.
机构：
[1] Cornell Univ, Baker Lab, Dept Chem & Biol Chem, Ithaca, NY 14853 USA
[2] Univ Stuttgart, Inst Anorgan Chem, D-70569 Stuttgart, Germany
来源：
ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES | 2007年 / 62卷 / 05期
关键词：
trivalent ytterbium; carbodiimide; cyanamide; crystal structure; optical spectroscopy;
D O I：
暂无
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Red-orange, transparent single crystals of Yb-2[CN2](3) [trigonal, R(3) over bar c (no. 167), a = 630.02(3) and c = 2947.4(2) pm, Z = 6] are obtained by the reaction of Yb, Sn, Zn[CN2] and NaN3 in are-welded Nb ampoules at 1100 K. The title compound exhibits characteristic C-N bond lengths and angles [d(C-N) = 122.7(3) pm and measured angle(N-C-N) = 178.4(5)degrees, respectively] within the [N=C=N](2-) unit as well as the expected fundamental frequencies in its optical spectra (Raman: nu(s) = 1338; delta = 643 / 683 / 695 cm(-1); IR: nu(as) = 2005 / 2037; delta = 640 / 679 cm(-1)). Since Yb-2[CN2](3) adopts a corundum-type structure, Yb3+ is octahedrally coordinated by six N atoms of different [CN2](2-) anions [d(Yb-N) = 228.6(3) and 233.4(3) pm, 3 x each] and every [CN2](2-) group has four Yb3+ as next neighbours which form a distorted tetrahedron.
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页码：658 / 662
页数：5
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