• Title/Summary/Keyword: Olefins

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Syntheses and Reactivites with Olefins of Ruthenium(IV) Oxo/Ruthenium(II)-Aqua Complexes that Contain 2,6-Bis(N-pyrazolylpyridine)

  • Jo, Du-Hwan;Yeo, Hwan-Jin
    • Bulletin of the Korean Chemical Society
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    • v.14 no.6
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    • pp.682-686
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    • 1993

  • The syntheses and reactivities with olefins of $[Ru^{II}(L_3)(L_2)OH_2]^{2+}$ $[L_3$= 2,6-bis(N-pyrazolyl)pyridine(bpp), 2,6-bis(3,5-dimethyl-N-pyrazolyl)pyridine $(Me_4bpp);\;L_2$= 2,2'-bipyridine(bpy), 4,4'-dimethyl-2,2'-bipyridine $(Me_2bpy)$] are described. Their spectral and redox properties in aqueous solution were investigated. Evidence for each one electron redox process for the $Ru^{IV}-Ru^{III}$ and $Ru^{III}-Ru^{II}$ couples has been obtained. Oxidation of $[Ru^{II}(bpp)(bpy)OH_2]^{2+}$ with $Ce^{IV}$ gave $[Ru^{IV}(bpp)(bpy)O]^{2+}$. The $[Ru^{IV}$= 0 complex is paramagnetic $({\mu}_{eff}=2.82)$ and the complexes $[Ru(L_3)(L_2)OH_2]^{2+}$ are robust catalysts for the oxidation of styrene, cyclohexene, and cyclooctene with cooxidant such as NaOCl. Product distributions and selectivities are discussed by varying the number of the substituted-methyl group in the ring.

  • https://doi.org/10.5012/bkcs.1993.14.6.682 인용 PDF

Photoreaction of 1,6-Disubstituted-1,3,5-hexatriynes with Some Olefins

  • Shim, Sang-Chul;Lee, Tae-Suk
    • Bulletin of the Korean Chemical Society
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    • v.7 no.4
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    • pp.304-308
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    • 1986

  • When the two conjugated poly-ynes, 1-phenyl-6-methyl- and 1,6-diphenyl-1,3,5-hexatriynes, were irradiated with UVA in deaerated 2,3-dimethyl-2-butene solution, 1:2 photoadducts, 1-(1'-phenylethynyl-2',2',3',3'-tetramethylcyclopr opyl)-2-(l",2",2",3",3"-pentamethylcyclopropyl) acetylene and 1-(1'-phenylethynyl-2',2',3',3'-tetramethylcyclopr opyl)-2-(1"-phenyl-2",2",3",3"-tetramethylcyclopropyl) acetylene, were obtained, respectively. No photoadduct was formed with aerated 2,3-dimethyl-2-butene, or deaerated solutions of dimethyl fumarate, methyl crotonate, dimethyl maleate, and trans-1,2-dichloroethylene. The results suggest that the reactions proceed from the triplet state only with electron rich olefins such as 2,3-dimethyl-2-butene.

  • https://doi.org/10.5012/bkcs.1986.7.4.304 인용 PDF