title: The synthesis, structures and magnetic properties of polynuclear Ru(III)-3d (3d = Mn(II/III), Ni(II), Cu(II)) compounds based on [Ru(III)(Q)2(CN)2]-.
abstract: The synthesis, crystal structures and magnetic properties of six cyano-bridged heterobimetallic compounds prepared from a paramagnetic Ru(III) building block, trans-(PPh(4))[Ru(III)(Q)(2)(CN)(2)] (1) (Q = the anion of 8-hydroxyquinoline), are described. 1 reacts with hydrated MnCl(2) in MeOH or DMF to produce a trinuclear compound {[Ru(III)(Q)(2)(CN)(2)](2)[Mn(II)(MeOH)(4)]}·8MeOH (2), or a 1-D zigzag chain {[Mn(II)(DMF)(2)(Cl)](μ-CN)(2)[Ru(III)(Q)(2)]}(n)(3). The Mn(II) has a distorted octahedral environment in 2 and a trigonal-bipyramidal environment in 3. 1 reacts with [Mn(III)(L(1))(Cl)(H(2)O)] in MeOH to produce the 1-D {[Ru(III)(Q)(2)](μ-CN)(2)[Mn(III)(L(1))]}(n) (4) that consists of alternating Mn(III) and Ru(III) units. 1 also reacts with [Cu(II)(cyclam)Br(2)] and [Ni(II)(cyclam)Cl(2)] in MeOH to produce the trinuclear complexes [Ru(III)(Q)(2)(CN(2))](2)[M(II)(cyclam)] (M = Cu(II) (5) and Ni(II) (6)). On the other hand, the reaction of 1 with [Ni(II)(cyclen)Cl(2)] produces a 1-D zigzag chain {([Ru(III)(Q)(2)(CN(2))][Ni(II)(cyclen)])[Ru(III)(Q)(2)(CN(2))]}(n) (7). Compounds 2-4 exhibit antiferromagnetic coupling between Ru(III) and Mn(III/II) centres. Antiferromagnetic coupling also occurs between Ru(III) and Cu(II) centres in 5. On the other hand, compounds 6 and 7 exhibit ferromagnetic coupling between Ru(III) and Ni(II) through cyanide bridges.
authors: Department of Biology and Chemistry, Institute of Molecular Functional Materials, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Hong Kong, China.
authors: Jing
authors: J
authors: Xiang
authors: Li-Hui
authors: LH
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authors: Bing-Wu
authors: BW
authors: Wang
authors: Shek-Man
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authors: Yiu
authors: Shie-Ming
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authors: Peng
authors: Wai-Yeung
authors: WY
authors: Wong
authors: Song
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authors: Lau