Synthesis and Structure of [Sn4Se11]6–, 3.0.CO;2-M/asset/equation/tex2gif-stack-1.gif?v=1&t=h5l55r5t&s=b439cdb160594bc76a5be3d9bf20c7c44cb6e3bd" class="inlineGraphic"> [Sn2Se52–], and 3.0.CO;2-M/asset/equation/tex2gif-stack-2.gif?v=1&t=h5l55r5t&s=155c1d4a988fd3c89485d09b17a5955efa65189b" class="inlineGraphic"> [Sn3Se72–] – Model Anions for the Solventothermal Reaction Pathway to Lamellar Selenidostannates(IV)

✍ Scribed by Anja Loose; William S. Sheldrick

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: German
• Weight: 205 KB
• Volume: 625
• Category: Article
• ISSN: 0372-7874
• DOI: 10.1002/(sici)1521-3749(199902)625:2<233::aid-zaac233>3.0.co;2-m

✦ Synopsis

Reaction of A 2 CO 3 (A = K, Rb) with Sn and Se in an H 2 O/CH 3 OH mixture at 115±130 °C affords the isotypic selenidostannates(IV) A 6 Sn 4 Se 11 ´x H 2 O (A = K, x = 8) 1 and 2 whose discrete [Sn 4 Se 11 ] 6± anions each contain two corner-bridged ditetrahedral [Sn 2 Se 6 ] 4± species. Similar reaction conditions with A = Cs afford Cs 2 Sn 2 Se 5 ´H2 O (3 a) and Cs 2 Sn 2 Se 5 (3 b) in which such [Sn 2 Se 6 ] 4± building blocks are connected through common Se atoms into infinite 2 ∞ [Sn 2 Se 5 2± ] chains. The 1 ∞ [Sn 3 Se 7 2± ] ribbons of (Et 4 N) 2 Sn 3 Se 7 (4), formed by treating (Et 4 N)I with Sn and Se in methanol at 130 °C, can be regarded as resulting from the condensation of 2 ∞ [Sn 2 Se 5 2± ] chains with molecular [SnSe 4 ] 4± anions. The anions [Sn 4 Se 11 ] 6± , 1 ∞ [Sn 2 Se 5 2± ], and 1 ∞ [Sn 3 Se 7 2± ] represent the products of individual reaction steps on the potential condensation pathway of [Sn 2 Se 6 ] 4± to the lamellar selenidostannates(IV) 2 ∞ [Sn 4 Se 9 2± ] or 2 ∞ [Sn 3 Se 7 2±

].