Synthesis, crystal structure and thermochromism of benzimidazolium
نویسندگان
چکیده
The synthesis and crystal structure of thermochromic, yellow benzimidazolium tetrachlorocuprate(II), (C7H7N2)2CuCl4 (1), have been reported. The compound crystallizes in the C2/c space group and contains discrete tetrahedral CuCl4 2 species. It absorbs one molecule of water from humid atmosphere at room temperature to produce a hydrated green form, (C7H7N2)2CuCl4 /H2O, which upon heating loses the water molecule in two steps to form the anhydrous yellow compound 1. The role of the water molecule on the solid state, yellowv/green thermochromic transformation is discussed. # 2002 Elsevier Science Ltd. All rights reserved.
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