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Cs 3 Se 22 , a Selenium‐rich Caesium Polyselenide containing Se 8 Crowns and $^{3}_{\infty}\rm [Se_{6}^{3-}]$ Anions with Radical Character
Author(s) -
Kromm Anna,
Sheldrick William S.
Publication year - 2006
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.200500347
Subject(s) - caesium , chemistry , selenium , product (mathematics) , crystallography , character (mathematics) , inorganic chemistry , organic chemistry , geometry , mathematics
Cs 3 Se 22 can be prepared together with the known compounds Cs 2 Sn 2 Se 6 and Cs 4 Sn 2 Se 6 by reacting Cs 2 CO 3 and Sn in a CH 3 OH/en solution at 120 °C. The presence of CuCl and the macrocyclic ligand 1,10‐dithia‐18‐crown‐6 are essential for product formation. The caesium polyselenide consists of anionic nets $^{3}_{\infty}\rm [Se_{6}^{3-}]$ that are separated by two layers of discrete Se 8 rings. Within the polymeric anions pairs of Se 3 ·− radical anions and Se 3 2− anions are linked through secondary interactions.