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Room‐Temperature Synthesis of Bismuth Clusters in Ionic Liquids and Crystal Growth of Bi 5 (AlCl 4 ) 3
Author(s) -
Ahmed Ejaz,
Köhler Daniel,
Ruck Michael
Publication year - 2009
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.200800302
Subject(s) - bismuth , ionic liquid , raman spectroscopy , oxidizing agent , chemistry , inorganic chemistry , ionic bonding , crystallography , ion , organic chemistry , catalysis , physics , optics
The viability of Lewis‐acid ionic liquids for the synthesis of low‐valent bismuth compounds is demonstrated. At room temperature, elemental bismuth and bismuth(III) cations synproportionate in the ionic liquid [BMIM]Cl/AlCl 3 ([BMIM] + : 1‐ n ‐butyl‐3‐methylimidazolium) within minutes. The existence of bismuth polycations in the dark colored solution was proven by Raman spectroscopy. Dark‐red crystals of Bi 5 (AlCl 4 ) 3 were isolated from the ionic liquid and characterized by Raman spectroscopy and X‐ray crystallography (rhombohedral space‐group $R{\bar 3}c$ , a = 1187.1(2) pm, c = 3012.0(3) pm). The method allows the synthesis of bismuth cluster compounds under milder conditions than in high‐temperature melts and more conveniently and environmental friendly than in liquid SO 2 with strongly oxidizing, toxic agents like SbF 5 or AsF 5 .