Crystal structures and magnetic properties of mercurry(II) bromide complexes with phyridyl-substituted N-oxyl N'-oxides(nitronyl nitroxides) | |
---|---|
學年 | 86 |
學期 | 1 |
出版(發表)日期 | 1998-01-01 |
作品名稱 | Crystal structures and magnetic properties of mercurry(II) bromide complexes with phyridyl-substituted N-oxyl N'-oxides(nitronyl nitroxides) |
作品名稱(其他語言) | |
著者 | Lee, C. J.; Hung, C. H.; 魏和祥; Wei, Ho-hsiang; Liu, Y. H.; Lee, G. H.; Wang, Yu |
單位 | 淡江大學化學學系 |
出版者 | Royal Society of Chemistry (RSC) |
著錄名稱、卷期、頁數 | Journal of the Chemical Society. Dalton Transactionsn 1, pp.171-176 |
摘要 | The crystal structures have been determined and magnetic properties investigated for four novel HgBr2 complexes with pyridyl-substituted ‘nitronyl nitroxides’, 4,4,5,5-tetramethyl-2-(4-pyridyl)-(L1), -2-(2-pyridyl)-(L2), -2-(3-pyridyl)-(L3) and -2-(6-methyl-2-pyridyl)-2-imidazoline N 1-oxyl N 3-oxide (L4). Complex 1, [HgBr2L1], is mononuclear, in which mercury(II) has planar trigonal co-ordination core, from two bromide atoms and one nitrogen atom of the pyridyl group. In 2, [HgBr2L2] the HgII atom has distorted-tetrahedral four co-ordination involving two bromide atoms and chelating by oxygen and nitrogen atoms of the L2 ligand. Complex 3, [(HgBr)3L32], is a zigzag polymeric chain with a distorted T-shaped HgBr2L3 unit and self-assembly involving co-ordination by an oxygen atom of the nitroxide groups. Complex 4, [(HgBr2)3L42], is a quasi-linear chain with HgBr2L4 moieties and HgBr2 cores. Cryomagnetic susceptibility measurements (4–300 K) showed that 1 and 3 exhibit a weak intermolecular alternating one-dimensional antiferromagnetic exchange interaction, while 3 and 4 possess weak one-dimensional antiferromagnetic and ferromagnetic exchange interactions respectively. A simple spin-polarization model has been used to justify the observed ferromagnetic exchange interaction between the spins of the radical NO group in complex 4. |
關鍵字 | |
語言 | en |
ISSN | 0300-9246 |
期刊性質 | 國外 |
收錄於 | |
產學合作 | |
通訊作者 | |
審稿制度 | 否 |
國別 | GBR |
公開徵稿 | |
出版型式 | ,紙本 |
相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/24909 ) |