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http://dx.doi.org/10.5012/bkcs.2004.25.6.823

Crystal Structures and Magnetic Properties of Sparteinium Tetrahalocuprate Monohydrate Compounds  

Lee, Yong-Min (Department of Chemistry and the Chemistry Institute for Functional Materials, Pusan National University)
Park, Sung-Min (Department of Chemistry and the Chemistry Institute for Functional Materials, Pusan National University)
Kang, Sung-Kwon (Department of Chemistry, Chungnam National University)
Kim, Young-Inn (Department of Chemistry Education, Pusan National University)
Choi, Sung-Nak (Department of Chemistry and the Chemistry Institute for Functional Materials, Pusan National University)
Publication Information
Bulletin of the Korean Chemical Society / v.25, no.6, 2004 , pp. 823-828 More about this Journal
Abstract
The crystal structures of sparteinium tetrachlorocuprate monohydrate $[(C_{15}H_{28}N_2)CuCl_4{\cdot}H_2O]$, 1 and sparteinium tetrabromocuprate monohydrate $[(C_{15}H_{28}N_2)CBr_4{\cdot}H_2O]$, 2, were determined. The structures of 1 [orthorhombic, $P2_12_12_1$, a = 8.3080(10) ${\AA}$, b = 14.6797(19) ${\AA}$ and c = 16.4731(17) ${\AA}$], and 2 [orthorhombic, $P2_12_12_1$, a = 8.4769(7) ${\AA}$, b = 15.166(3) ${\AA}$ and c = 16.679(3) ${\AA}$], are composed of a doubly protonated sparteinium cation, $[C_{15}H_{28}N_2]^{2+}$, a discrete $CuX_4^{2-}$ anion $(X=Cl^-\;or\;Br^-)$, and one water molecule. These monomeric compounds are stabilized through various types of hydrogen bonding interaction in their packing structures. Crystal 2 exhibits weak anti-ferromagnetism (J = -3.24 $cm^{-1}$) as opposed to the magnetically isolated paramagnetism observed for 1. The results of comparative magneto-structural investigations of 1 and 2 suggest that the pathway for the weak anti-ferromagnetic super-exchange in 2 might be through a Cu-Br${\cdots}$Br-Cu contact.
Keywords
Copper(II); Anti-ferromagnetism; (-)-Sparteine;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
Times Cited By Web Of Science : 13  (Related Records In Web of Science)
Times Cited By SCOPUS : 13
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