Charge Migration through Sigma Bonds in a Fragment Ion from 5,5′-Divaleryl-2,2′-spirobiindan under Electron Impact
作者:Akira Tatematsu、Shinobu Naga、Hiroshi Sakurai、Toshio Goto、Hisao Nakata
DOI:10.1246/bcsj.44.3450
日期:1971.12
nature of charge and radical electron migration in mass spectral fragment ions, 5,5′-di-n-valeryl-2,2′-spirobiindan (3) was prepared and its mass spectrum was measured. The successive loss of two propylene molecules from the molecular ion to give peaks at m⁄e 346 (b) and 304 (c) was clearly indicated by observing appropriate metastable ion peaks. As the radical electron is one of the prerequisites for
为了检查质谱碎片离子中电荷和自由基电子迁移的性质,制备了 5,5'-di-n-valeryl-2,2'-spirobindan (3) 并测量了其质谱。通过观察适当的亚稳态离子峰清楚地表明,从分子离子中连续损失两个丙烯分子以在 m/e 346 (b) 和 304 (c) 处产生峰。由于自由基电子是发生这些碎片的先决条件之一,结果表明电荷和自由基电子可以通过碎片离子 b 中的 σ 键迁移,因为即使有 C,两个正戊苯基基团也不能靠近螺环的-C键裂变。虽然 m⁄e 331 (a) 处的最强峰归因于 3 中羰基的普通 α-裂变,