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Molecular Polyselenide Anions Sandwiched between Cationic Extended Metal Hydroxides: Synthesis and Structures of [Sr 2 Sn(OH) 6 (H 2 O) 6 ]Se 4 and [Sr 2 Sn(OH) 6 (H 2 O) 5 ]Se 3 ·H 2 O
Author(s) -
Wang Xiqu,
Wang Haiyin H.,
Makarenko Boris,
Jacobson Allan J.
Publication year - 2012
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/zaac.201200307
Subject(s) - crystallography , octahedron , cationic polymerization , crystal structure , tin , chemistry , metal , hydrothermal synthesis , hydrothermal circulation , strontium , space group , x ray crystallography , stereochemistry , diffraction , physics , organic chemistry , optics , seismology , geology
Two new strontium tin hydroxy polyselenides [Sr 2 Sn(OH) 6 (H 2 O) 6 ]Se 4 ( 1 ) and [Sr 2 Sn(OH) 6 (H 2 O) 5 ]Se 3 · H 2 O ( 2 ) were synthesized from hydrothermal reactions. Their structures were determined from single‐crystal X‐ray data measured at 218 K. Compound 1 crystallized in the space group P $\bar{1}$ with a = 5.935(1), b = 8.440(1), c = 9.464(2) Å, α = 97.292(2)°, β = 104.957(2)°, γ = 110.328(2)°. Compound 2 crystallized also in the space group P $\bar{1}$ with a = 10.658(2), b = 11.082(2), c = 15.797(2) Å, α = 73.303(4)°, β = 74.942(4)°, γ = 64.627(3)°. Both compounds have structures containing infinite cationic layers of hydrated metal hydroxides built from Sn(OH) 6 octahedra and Sr(OH, H 2 O) n polyhedra. Molecular Se 4 2– and Se 3 2– anions are located in the interlayer spaces of 1 and 2 , respectively. The Se 4 2– anions of 1 adopt a flat zigzag conformation with a torsion angle of 0°.