• Title/Summary/Keyword: Ni double-Decker Complexes

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Synthesis of Nickel Double-decker Complexes Containing 1,4-Dibora-2,5-cyclohexadiene Derivatives as Ligand (1.4-Dibora-2,5-cyclohexadiene 유도체를 리간드로 갖는 니켈 Double-decker 착물의 합성)

  • Eom, Jae Guk
    • Journal of the Korean Chemical Society
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    • v.46 no.3
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    • pp.213-218
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    • 2002
  • (${\eta}$5-Cyclopentadienyl)(${\eta}$6-1,2,3,4-tetramethyl-1,4-dibora-2,5-cyclohexadiene)Ni (5) was synthe-sizedas a main product by the reaction of cyclopentadienyl(carbonyl)nickel dimer and 1,2,3,4-tetramethyl-1,4-di-bora-2-cyclohexene (1). Di-allyl nickel reacted with 2,3-diethyl-1,4-di-methyl-1,4-dibora-2-cyclohexene (2) at -20$^{\circ}C$ to give bis(${\eta}$6-2,3-diethyl- 1,4-dimethyl-1,4-dibora-2,5-cyclohexadiene)nickel (6) in the yield of 15%. By the reaction of di-allyl nickel and 2,3-dimethyl-1,4-diethoxy-1,4-di- bora-2-cyclohexene (3) at -20$^{\circ}C$ bis[${\eta}$6-2,3-dim-ethyl-1,4-diethoxy-1,4-di- bora-2,5-cyclohexadiene]nickel (7) was obtained in 22% yield. These double-decker complexes were difficult to separate because of their unstabilities and were identified by ESR, NMR, MS and ele-mental analysis, etc.