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Synthesis and Structure of the Bicyclic [Sn4Se11]6– Anion in Na6Sn4Se11 · 22 H2O

✍ Scribed by A. Loose; W. S. Sheldrick

Publisher: John Wiley and Sons
Year: 2001
Tongue: German
Weight: 74 KB
Volume: 627
Category: Article
ISSN: 0372-7874
DOI: 10.1002/1521-3749(200109)627:9<2051::aid-zaac2051>3.0.co;2-6

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✦ Synopsis

Na 6 Sn 4 Se 11 ´22 H 2 O can be crystallised at ±8 °C as yellow-orange needles from the 1 : 2 H 2 O/CH 3 OH mother liquor of a superheated reaction mixture of NaOH(s), Sn and Se. The bicyclic [Sn 4 Se 11 ] 6± anion exhibits crystallographic C 2 symmetry and is composed of corner-bridged SnSe 4 tetrahedra. Two opposite tin atoms of an Sn 4 Se 4 8-membered ring are linked by a common Se atom, thereby affording two 6-membered boat-shaped Sn 3 Se 3 rings with a shared Sn±Se±Sn bridging unit. [Sn 4 Se 11 ] 6± thus represents the immediate precursor of the well-known adamantane-like [Sn 4 Se 10 ] 4± anion.

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