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Synthesis and Structure of [Sn 4 Se 11 ] 6– , 1 ∞ [Sn 2 Se 5 2– ], and 1 ∞ [Sn 3 Se 7 2– ] – Model Anions for the Solventothermal Reaction Pathway to Lamellar Selenidostannates(IV)
Author(s) -
Loose Anja,
Sheldrick William S.
Publication year - 1999
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/(sici)1521-3749(199902)625:2<233::aid-zaac233>3.0.co;2-m
Subject(s) - chemistry , lamellar structure , crystallography , condensation reaction , reaction conditions , stereochemistry , methanol , crystal structure , medicinal chemistry , catalysis , organic chemistry
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 _. xH 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 _. H 2 O ( 3a ) and Cs 2 Sn 2 Se 5 ( 3b ) 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– ].