Isolation and Structural Characterization of 1-Zirconacyclopent-3-yne, Five-Membered Cyclic Alkynes
Isolation and Structural Characterization of 1-Zirconacyclopent-3-yne, Five-Membered Cyclic Alkynes
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DOI：
10.1126/science.1067157
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发表时间：
2002-01
期刊：
影响因子：
56.9
通讯作者：
N. Suzuki;M. Nishiura;Y. Wakatsuki
中科院分区：
文献类型：
--
作者：
N. Suzuki;M. Nishiura;Y. Wakatsuki
稳定的五元环炔的合成，分离，并充分表征。二价锆（二（III）锆）与（Z）-1，4-二取代1，2，3-丁三烯[（Z）-R-CH=C=C=CH-R，1a：R =（CH 3）3Si-，1b：R = tert-C 4 H 9-]反应，以较好的产率得到1-锆杂环戊二烯-3-炔化合物（2a-b）。X-射线衍射分析表明，它们的五元环状结构具有足够短的三键，将该化合物视为金属环戊炔。
Stable five-membered cyclic alkynes were synthesized, isolated, and fully characterized. Divalent zirconium species, bis(cyclopentadienyl)zirconium(II) equivalent, reacted with (Z)-1,4-disubstituted 1,2,3-butatrienes [(Z)-R-CH=C=C=CH-R, 1a: R = (CH3)3Si-, 1b: R =tert-C4H9-] to give 1-zirconacyclopent-3-yne compounds (2a-b) in good yields. X-ray diffraction analysis revealed their five-membered cyclic structure with a sufficiently short triple bond to regard this compound as a metallacyclopentyne.