- Unusual reductive behaviour of a trans-NiI2(RNC)2 complex at mercury and platinum electrodes
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Electrochemical reations of NiI2(RNC)2 (R = 2,6-Me2C6H3) differed according to electrode materials.At a platinum electrode the reaction was shown by cyclic voltammogram to proceed in the usual electrochemical manner, but at a mercury electrode, there operated a CE mechanism.
- Ehara, Kazuko,Kumagaya, Kenji,Yamamoto, Yasuhiro,Takahashi, Katsuo,Yamazaki, Hiroshi
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- Homoleptic nickel(0) phenyl isocyanide complexes
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The tetrakis(phenyl isocyanide)nickel(0) complexes [Ni(CNR)4](R = C6H5,1; R = C6H3-2,6-Me 2, 2; R = C6H4-2-NO2, 3) have been synthesized from [Ni(COD)2
- Hahn, F. Ekkehardt,Münder, Marco,Fr?hlich, Roland
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p. 850 - 854
(2007/10/03)
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- Transition metal compound, catalyst for polymerization of olefin, and process for polymerization of olefin using the catalyst
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Catalyst for polymerization of an olefin is provided, which comprises (A) a transition metal compound having a carbon-metal bond structure and (B) an activating co-catalyst, or (A) a transition metal compound having a carbon-metal bond structure, (B) an a
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- Electrochemical Reactions of Dihalobis(isocyanide)nickel(II) at Platinum and Mercury Electrodes
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Electrochemical reactions of divalent nickel complexes, NiX2(RNC)2 (1) (X=I, Br, Cl; R=2,6-Me2C6H3 (Xyl), 4-Br-2,6-Me2C6H2, 2,4-t-Bu2-6-MeC6H2, 2,4,6-t-Bu3C6H2) were carried out at Hg and Pt electrodes.Cyclic voltammograms (CVs) of 1 at a Pt electrode showed a quasi-reversible redox wave at ca. -0.50 V, due to two-electron reduction .The reduction potential of the iodide (1a) or bromide (1f) complex (R=Xyl) shifted to the positive side by ca. 0.3 V in the presence of isocyanide, due to the electrochemical reaction of NiX2(RNC)3 (X=I, Br).The chloride complex (1e) showed a similar potential in the presence in the presence or absence of isocyanide; there exists no five-coordinated complex.The CV of 1a at a Hg electrode showed a redox wave at -0.74 V, due to the redox reaction of the unsaturated species, (4) formed from the reaction of 1a with Hg, suggesting the CE mechanism.Compound 1a had a redox potential at -0.72 V in the presence of 2,6-xylyl isocyanide, being responsible for 2.The bromide complex showed a similar behavior, but the chloride complex underwent a very complicated reaction.The electrochemical mechanism of NiX2(RNC)2 with or without isocyanide is discussed.
- Yamamoto, Yasuhiro,Ehara, Kazuko,Takahashi, Katsuo
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p. 778 - 783
(2007/10/02)
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