解析 angle strain是由于分子中某相邻键的角度与该类正常键的键角相差很大引起的.例如环丙烷C-C-C的夹角为60度,这与饱和烃中C-C-Csp3键角109.5度相差很大,所以不稳定.一般说成,由于存在angle strain,因此环丙烷有开环的倾...结果一 题目 angle strain,torsional strain和steric strain之间有什么区别呀? 答案 ...
angle strain是由于分子中某相邻键的角度与该类正常键的键角相差很大引起的。例如环丙烷C-C-C的夹角为60度，这与饱和烃中C-C-Csp3键角109.5度相差很大，所以不稳定。一般说成，由于存在angle strain，因此环丙烷有开环的倾向，易于开环来释放angle strain.torsional strain是由于重叠式构象带来的空间...
答案解析 查看更多优质解析 举报 angle strain是由于分子中某相邻键的角度与该类正常键的键角相差很大引起的.例如环丙烷C-C-C的夹角为60度,这与饱和烃中C-C-Csp3键角109.5度相差很大,所以不稳定.一般说成,由于存在angle strain,因此环丙烷有开环的倾... 解析看不懂?免费查看同类题视频解析查看解答 ...
Cherest M, Felkin H. The Influence of steric and torsional strain on the steric course of additions to cyclohexanones. The reaction between 4-t-butylcyclohexanone and t-butylallyl magnesium bromide. Tetrahedron Lett 1971;5:383-6.Cherest, M.; Felkin, H. The Influence of Steric and Torsional...
Addition reactions of alkenes to ester enolate radicals have been particularly well studied and minimization of allylic strain (A1,3 and A1,2) as well as torsional strain have been found of importance in these reactions. Further studies have shown that electronic effects may also dominate for ...
(1968). Torsional strain involving partial bonds: The steric course of the reaction between allyl magnesium bromide and 4-T-butyl-cyclohexanone. Tetrahedron Letters, 18, 2205-2208.Cherest, M.; Felkin, H., Torsional Strain Involving Partial Bonds. The Steric Course of the Reaction between Allyl...
The Oaq–RE–Oaq angle is ca. 70.7–70.8°, with an Oaq⋯Oaq distance of ca. 2.69–2.77 Å. Such structural flexibility seems to be beneficial to accommodate the strain accompanied by the 12-membered ring formation. Figure 2. Crystal structure of (a) the [Y(hfac)3(H2O)2] moiety ...