2003年5月
Mononuclear platinum(II) complexes coordinated by pyridyl nitronyl nitroxide radicals: structures and magnetic properties of trans-[Pt(NH3)(2)(NITpPy)(2)]((NO3)(2) and cis-[PtCl2(NIToPY)(2)]
INORGANICA CHIMICA ACTA
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- 巻
- 348
- 号
- 開始ページ
- 123
- 終了ページ
- 128
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/S0020-1693(02)01513-X
- 出版者・発行元
- ELSEVIER SCIENCE SA
Crystal structures and magnetic properties of mononuclear Pt-II complexes coordinated by pyridyl nitronyl nitroxide radicals, trans-[Pt(NH3)(2)(NITpPy)(2)](NO3)(2) (NITpPy = 2-(4-pyridyl)-4,4,5.5-tetramethyl-4,5-dihydro-1H-imidazolyl-1-oxyl 3-oxide) and cis[PtCl2(NIToPy)(2)] (NIToPv=[2-(2-pyridyl)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazolyl-1-oxyl 3-oxide]) have been characterized. In both complexes. the radical ligands are square planar coordinated to the Pill ion through the nitrogen atoms of the pyridine ring. Complex of cis-[PtCl2(NIToPy)(2)] has short non-bonding intramolecular distances between the Pt-II center and the nitroxide oxygens of the radicals ((PtO)-O-... = 3.31 Angstrom), showing a pseudo octahedral coordination. Magnetic susceptibility of tralls[Pt(NH3)(2)(NITpPy)(2)](NO3)(2) obeys the Curie-Weiss law with a weak antiferromagnetic interaction (theta = - 1.4 K), and that of cis-[PtCl2(NIToPy)(2)] is fitted by a singlet-triplet model (2J/k(B) = -27.2 K, theta = - 1.1 K). The intramolecular antiferromagnetic property in the latter complex can be ascribable to a through-space interaction between the radical moieties through the Pt-II ion. (C) 2002 Elsevier Science B.V. All rights reserved.
- リンク情報
- ID情報
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- DOI : 10.1016/S0020-1693(02)01513-X
- ISSN : 0020-1693
- Web of Science ID : WOS:000183004900017