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K 8 [B 12 (BSe 3 ) 6 ]: A Novel Selenoborato‐ closo ‐dodecaborate with Different Anion Substitution Patterns
Author(s) -
Hammerschmidt A.,
Lindemann A.,
Döch M.,
Krebs B.
Publication year - 2003
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.200300052
Subject(s) - monoclinic crystal system , crystallography , alkali metal , boron , selenide , chemistry , icosahedral symmetry , ion , crystal structure , cluster (spacecraft) , potassium , selenium , inorganic chemistry , organic chemistry , computer science , programming language
Systematic studies on selenoborates containing a B 12 cluster entity and alkali metal cations led to the new crystalline phase K 8 [B 12 (BSe 3 ) 6 ] which consists of a icosahedral B 12 cluster completely saturated with trigonal‐planar BSe 3 units and potassium counter‐ions. For the first time three different anion substitution patterns are observed in one crystal structure. The new chalcogenoborate was prepared in a solid state reaction from potassium selenide, amorphous boron and selenium in evacuated carbon coated silica tubes at a temperature of 850 °C. K 8 [B 12 (BSe 3 ) 6 ] crystallizes in the monoclinic space group Cm (no. 8) with a = 16.288(2)Å, b = 41.617(4)Å, c = 9.788(1)Å, β = 109.59(1)°, and Z = 6.