Abstract |
(η5-Cyclopentadienyl)(η6-1,2,3,4-tetramethyl-1,4-dibora-2,5-cyclohexadiene)Ni(5)는 cyclopentadienyl (carbonyl)-nickel dimer와 1,2,3,4-tetramethyl-1,4-dibora-2-cyclohexene (1)을 반응시켜서 주생성물로 얻었다. Di-allyl nickel과 2,3-diethyl-1,4-dimethyl-1,4-dibora-2-cyclohexene (2)을 -20℃에서 반응시켜서 bis[η6-2,3-dimethyl-1,4-diethoxy-1,4-dibora-2,5-cyclohexadiene]nickel (6) 착화합물을 15% 수율로 생성하였다. 그리고 야-allyl nickel과 2,3-dimethyl-1,4-diethoxy-1,4-dibora-2-cyclohexene (3)을 역시 -20℃에서 반응시켜서 22% 수율로 bis[η6-2,3-dimethyl-1,4-diethoxy-1,4-dibora-2,5-cyclohexadiene] nickel (7)을 생성하였다. 이들 double-decker 착화합물들은 불안정하여 분리하기 어려웠으며, NMR, MS, 원소분석 등으로 확인하였다. (η5-Cyclopentadienyl)(η6-1,2,3,4-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℃ to give bis(η6-2,3-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℃ bis[η6-2,3-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. |
