- Further examples of complexes related by electron-transfer reactions: Complexes derived from bis(trifluoromethyl)-1,2-dithietene
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A new series of four-coordinate bis chelate complexes of the general type [MS4C4(CF3)4]z has been prepared. This series is closely related to that previously described1,2 containing [MS4C4(CN)4]2 complexes (z = -1, -2) in that its members undergo facile one-electron transfer reactions and those with z = -1, -2 are believed to have a planar structure. Complexes with z = -2, M = Pd, Pt, Co; z = -1, M = Pd, Pt, Co, Fe; and z = 0, M = Pt, Co, have been synthesized and supplement the nickel complexes with z = 0, -1, -2 obtained in earlier work.1,2 The syntheses of all complexes are presented in detail. Chemical stabilities are discussed in terms of polarographic half-wave potentials. The results of magnetic susceptibility, electron spin resonance, nuclear magnetic resonance, and infrared spectral studies are presented and discussed in terms of probable electronic structures and chemical bonding in the complexes.
- Davison,Edelstein,Holm,Maki
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- The synthesis and characterization of Ni, Pd and Pt maleonitriledithiolate complexes: X-ray crystal structures of the isomorphous Ni, Pd and Pt (Ph2PCH2CH2PPh 2)M(maleonitriledithiolate) congeners
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The synthesis of a series of maleonitriledithiolate complexes of nickel, palladium and platinum phosphines having the formulae (dppe)M(mnt) and (Ph3P)2M(mnt) (where dppe = Ph2PCH2CH2PPh2, mnt = 1,2-dicyanoethene-1,2-dithiolate and M = Ni, Pd or Pt) from the reaction of Na2(mnt) and the appropriate (phosphine)MCl2 is reported. These complexes were characterized by a combination of mass spectrometry, IR, UV-Visible and 1H, 13C and 31P NMR spectroscopy. In addition, characterization of the title complexes by single crystal X-ray diffraction of all three congeners revealed them to be isomorphous. Analysis of the diffraction data reveals that the metal centers are all square planar, that the planar mnt ligands are tilted slightly away from the metal square planes, and that the mnt ligand is best described as a dithiolate rather than a dithione.
- Landis, Katy G.,Hunter, Allen D.,Wagner, Timothy R.,Curtin, Larry S.,Filler, Francesca L.,Jansen-Varnum, Susan A.
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p. 155 - 162
(2008/10/08)
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