Synthesis and structure of Nb-2(mu(2)-Se-2)(2)(Te2I6)(2)

被引：12
|
作者：
Fedin, VP [1 ]
Fedorov, VE [1 ]
Imoto, H [1 ]
Saito, T [1 ]
机构：
[1] UNIV TOKYO,SCH SCI,DEPT CHEM,BUNKYO KU,TOKYO 113,JAPAN
来源：
POLYHEDRON | 1997年 / 16卷 / 07期
关键词：
crystal structure; niobium complexes; selenium complexes; tellurium complexes;
D O I：
10.1016/S0277-5387(96)00419-6
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Compound Nb-2(mu(2)-Se-2)(Te2I6)(2) was obtained in high yield by high-temperature reaction (500 degrees C) of the dinuclear cluster complex Nb-2(mu(2)-Se-2)(2)I-4 with Te and I-2 in a 1:4:4 ratio. The structure of Nb2Se4Te4I12 has been determined by single-crystal X-ray diffraction. It is characterized by the presence of isolated molecules of [Nb-2(mu(2)-Se-2)(2)(Te2I6)(2)]. The inner skeleton is formed by a dinuclear [Nb-2(mu(2)-Se-2)(2)](4+) fragment with a Nb-Nb distance of 2.926(2) Angstrom; the Se-Se distances are 2.310(2) and 2.311(2) Angstrom. Each Nb atom is ligated (formally) by Te2I62- ligands. The terminal Te-I distances in the Te2I62- ligands range from 2.735(2) to 2.786(2) Angstrom. The bridging Te-I distances are rather long, ranging from 3.175(1) to 3.261(2) Angstrom. Copyright (C) 1997 Elsevier Science Ltd.
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页码：995 / 998
页数：4
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