Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/34989
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dc.contributor.authorHuang, M.Y.en_US
dc.contributor.author葉鎮宇zh_TW
dc.contributor.authorYeh, C.Y.en_US
dc.contributor.authorLee, G.H.en_US
dc.contributor.authorPeng, S.M.en_US
dc.date2006zh_TW
dc.date.accessioned2014-06-06T07:48:38Z-
dc.date.available2014-06-06T07:48:38Z-
dc.identifier.issn1477-9226zh_TW
dc.identifier.urihttp://hdl.handle.net/11455/34989-
dc.description.abstractThis study provides an opportunity to control the magnetic spin of nickel atoms using various mixed anionic ligands. A series of linear trinickel complexes supported by two kinds of ligands, oligo-alpha-pyridylamido and sulfonyl amido/amido, were synthesized and their structures were determined by X-ray diffraction. The three nickel atoms of [Ni-3(Lpts)(2)(dpa)(2)](1) (dpa(-) = dipyridylamido, Lpts(2-) = N,N'-bis(p-toluenesulfonyl)pyridyldiamido) display short Ni-N (similar to 1.90 angstrom) bond distances, which are consistent with a low spin state of Ni(II) ions, and exhibit spin states of ( 0, 0, 0) for the three Ni( II) ions. One of the terminal Ni(II) ions of [Ni-3(Lms)(2)(dpa)(2)(H2O)] (2) (Lms(2-) = N,N'-bis(4-methylsulfonyl)-pyridyldiamido) and [Ni-3(Lpts)(2)(pepteaH(2))] (4) (pepteaH(2)(2-) = pentapyridyldiamidodiamine) bonded with an axial ligand exhibits a square pyramidal (NiN4X) geometry with long Ni-N bond distances (similar to 2.10 angstrom) which are consistent with a high spin Ni(II) configuration. The spin states of these trinickel complexes are ( 1, 0, 0). Complex 2 and 6 can be interchanged by the removal or addition of an axial water molecule. The structural features of 6 are comparable with those of 1. Both the terminal Ni(II) ions in [Ni-3(LAc)(2)(dpa)(2)] (3) (Lac(2-) = N,N'-biacetyl-pyridyldiamido) are in square pyramidal geometry and exhibit high spin. The spin states of the nickel ions in 3 are (1, 0, 1), and the two terminal nickel ions exhibit antiferromagnetic interactions. The molecular structure of [Ni-3(Lpts)(2)(dpa)(2)](BF4) (5), which was obtained by the one-electron oxidation of 1, is similar to those of the neutral analogue 1, except for the presence of a counter anion to compensate for the positive charge on the Ni-3 core. All of the Ni-Ni bond lengths of 5 are slightly shorter (ca. 0.05 angstrom) than those in the neutral analogues. This is attributed to the formation of partial Ni-Ni bonding.en_US
dc.language.isoen_USzh_TW
dc.relationDalton Transactionsen_US
dc.relation.ispartofseriesDalton Transactions, Issue 48, Page(s) 5683-5690.en_US
dc.relation.urihttp://dx.doi.org/10.1039/b612123cen_US
dc.subjectmetal string complexesen_US
dc.subjecttripyridyldiamido dianionen_US
dc.subjectelectronic-propertiesen_US
dc.subjectbondsen_US
dc.subjecttetrapyridyltriamineen_US
dc.subjectanisotropyen_US
dc.subjecttpda(2-)en_US
dc.subjectchainsen_US
dc.subjectncsen_US
dc.subjectclen_US
dc.titleControl of magnetic spin states by various mixed anionic ligands in trinickel complexes: synthesis, crystal structures and physical propertiesen_US
dc.typeJournal Articlezh_TW
dc.identifier.doi10.1039/b612123czh_TW
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