On the Electronic Nature of a Butadienyl Biradical – Experiments and ab initio MO Calculations
作者:Rolf Gleiter、Hagen Weigl、Gebhard Haberhauer
DOI:10.1002/(sici)1099-0690(199807)1998:7<1447::aid-ejoc1447>3.0.co;2-l
日期:1998.7
The spin state of the biradical obtained upon heating 1,6-diisopropyl-1,6-diazacyclodeca-3,8-diyne (I) was investigated. Compd. I was heated in Ph2, naphthalene, and PhBr at 150 Deg in the presence of a mixt. of [d4]- and [d0]-9,10-dihydroanthracene (DHA) as H source. The relative contributions of the cage (C) and cage-escape (E) reaction paths could be detd. by analyzing the products 2,6-diisopropyl-1
研究了加热 1,6-二异丙基-1,6-二氮杂环癸-3,8-二炔 (I) 时获得的双自由基的自旋状态。化合物 在混合物的存在下,我在 Ph2、萘和 PhBr 中以 150 度加热。[d4]- 和 [d0]-9,10- 二氢蒽 (DHA) 作为 H 源。可以确定笼子 (C) 和笼子逃逸 (E) 反应路径的相对贡献。通过分析产物 2,6-二异丙基-1,2,3,5,6,7-六氢-2,6-萘啶和 2,6-二异丙基-4-(9,10-二氢蒽基)-1,2, 3,5,6,7-六氢-2,6-萘啶及其氘代类似物。确定了 C/E 比。通过 GC-MS 分析。发现在 Ph2 中为 0.30,在萘中为 0.40,在 PhBr 中为 0.22,并且或多或少与 DHA 浓度无关。在广泛的范围内。1,6-diazacyclodeca-3,8-diyne (II) 环化为 1,2,3,5,6,7-hexahydro-2 的能