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The Chemical Educator
ISSN: 1430-4171 (electronic version)
Abstract Volume 15
(2010) pp 3-4
Classroom Demonstration of A Novel Colorless Cupric Complex
Luo Yang-he, †,‡ Yang Hai-jun,‡ Zhang Hao,‡ and Li Yong‡,*
†Department of Chemical and Biological
Engineering, Hezhou University, Hezhou, Guangxi 542800, People's Republic
of
China; ‡Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical
Biology (Ministry of Education), Department of Chemistry, Tsinghua University,
Beijing 100084, People's Republic of China, luoyanghe@tsinghua.org.cn
Received
November 21, 2008. Accepted June 26, 2009.
Published: 9 January 2010
Abstract. A novel colorless 3dz2 ground-state doublet [Cu(15C5)(H2O)2](ClO4)2 complex in CH3CN was prepared in the molar ratio of 1:3 Cu(ClO4)2 to 15-Crown-5 and in the concentration range of Cu(ClO4)2 from 6.0 × 10-3 mol/L to 1.0 × 10-2 mol/L . The UV-Vis spectrum shows that the complex has scarcely any absorption in the range of 400~800nm. A simple and quick classroom demonstration is described for the formation of the colorless Cu(II) complex.
Key Words: Laboratories and Demonstrations; general chemistry
(*) Corresponding author. (E-mail: luoyanghe@tsinghua.org.cn)
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