Structures and Magnetic Properties of Two Copper(II) Complexes with 2,5‐Dichloro‐3,6‐Dihydroxy‐1,4‐Benzoquinone Dianionic and Tetrachloroquinone Ligand |
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| Authors: | Yun‐Ho Chung Szu‐I Fang Shu‐Hui Fang Hsin‐Huang Lin Shyh‐Yeon Liou |
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| Institution: | 1. Department of Food and Nutrition, Meiho Institute of Technology, Neipu, Pingtung, Taiwan, R.O.C.;2. Chemistry Division, Lo Yu Senior High School, Taliao, Kaohsiung County, Taiwan, R.O.C.;3. Language Education Center, Fooyin University, Taliao, Kaohsiung County, Taiwan, R.O.C.;4. Everest Textile CO., LTD, Shanhua., Tainan County, Taiwan, R.O.C.;5. Chemical Systems Research Division, Chung‐Shan Institute of Science and Technology, Taoyuan, Taiwan, R.O.C. |
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| Abstract: | The polynuclear copper(II) complex Cu2(Hdpa)2(μ‐ClDHBQ)(ClO4)2]n, 1 is bridged by ClDHBQ?2 (2,5‐dichloro‐3,6‐dihydroxy‐1,4‐benzoquinone dianionic) and 2,2′‐dipyridylamine (Hdpa). In the axial position, Cu is connected with the oxygen atom of ClO . The perchlorate anion may be envisaged as a monodentate O‐bound ligand. Through the bond bridge of O–Cu … O–Cl, the binuclear compound Cu2(Hdpa)2(μ‐ClDHBQ)(ClO4)2] is strung together into a long chain compound. Tetrachlorocatechol underwent partial oxidation/hydrolysis/dechlorination processes to produce ClDHBQ?2. The other mononuclear complex Cu(Hdpa)(TeCQ)](DMF), 2 , in which tetrachloroquinone (TeCQ) was produced by oxidation of tetrachlorocatechol (TeCC), therefore complex 2 is in the quinone form. The magnetic susceptibility measurements show antiferromagnetic coupling with J = ?11.9 cm?1, θ = 2.6 K, and g = 2.05 for complex 1. Complex 2 exhibits the typical paramagnetic behavior of s = 1/2. |
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| Keywords: | 2 2′ ‐Dipyridylamine Laccase reaction Tetrachlorocatechol Chloranilic acid 2 5‐Dichloro‐3 6‐dihydroxy‐1 4‐benzoquinone dianionic Bleaney‐Bowers equation |
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