Beiträge zur chemie des iodpentafluorids teil III. Chelatisierung und strukturisomerie bei α,β-methylierten IOD(V)-α,β-ethandiolat-fluoriden
作者:Hermann Josef Frohn、Wolfgang Pahlmann
DOI:10.1016/s0022-1139(00)81142-2
日期:1985.6
We report metathetical reactions of IF5 with series of α,β-trimethylsilylated ethanediolates with increasing numbers of CH3-groups in α- and β-positions. Short lived intermediates IF4[OC2H4−n(CH3)nO]X with X = Si(CH3)3 or IF4 and stable chelates IF3[OC2H4−n(CH3)nO] and IF[OC2H4−n(CH3)nO]2 (n = 0–4) are observed and characterized. Time and temperature dependence of 19F-NMR-spectra in relation to degree
我们报道了IF 5与一系列α,β-三甲基甲硅烷基化的乙二醇酯的易位反应,其中α-和β-位的CH 3基团数量增加。短寿命中间体IF 4 [OC 2 H 4-n(CH 3)n O] X和X = Si(CH 3)3或IF 4和稳定的螯合物IF 3 [OC 2 H 4-n(CH 3)n O ]和IF [OC 2 H 4-n(CH 3)n O] 2(n = 0–4)被观察并表征。讨论了19 F-NMR光谱与甲基化程度,排列方式和立体化学有关的时间和温度依赖性,参考了以前发布的包含一系列单齿醇化物CH 3-n的单核和多核I(V)-化合物( CH 3)ñ ø -和(CH 3)3 CCH 2 ø -(N = 0,2,3)[1,2]和二齿醇化物- O(CH 2)ñ ø -(N = 2,3, 4,5,6,12)[1]。与脂族α相反,β-二醇化芳族二醇化1,2-C 6 H4(O - )2,1,2--C 6氯4(O