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Beiträge zur chemie des iodpentafluorids teil III. Chelatisierung und strukturisomerie bei α,β-methylierten IOD(V)-α,β-ethandiolat-fluoriden by Hermann Josef Frohn; Wolfgang Pahlmann is a Chemistry article available to read on EtoBox.
What is Beiträge zur chemie des iodpentafluorids teil III. Chelatisierung und strukturisomerie bei α,β-methylierten IOD(V)-α,β-ethandiolat-fluoriden about?
We report metathetical reactions of IF5 with series of a,B-trimethylsilylated ethanediolates with increasing numbers of CH3-groups in a-and B-positions. Short lived intermediates IF4[0C2H4-n(CH3)nO]X with X = Si(CH3)3 or IF4 and stable chelates IF3[0C2H4-n(CH,)nO] and IF[OC2H4-,,(CH3),,012 (n = 0 -4) are observed and characterized. Time and temperature dependence of "F-NMR-spectra in relation to degree of methylation, arrangement and stereo-chemistry are discussed referring to previously published mono-and polynuclear I(V)-compounds containing a series of monodentate alcoholates CH 3-n(CH3)nO-and (CH3)3CCH20-(n = 0,2,3) [I,21 and of bidentate alcoholates -O(CH2)nO-(n = 2,3,4,5,6,12) [I]. In contrast to aliphatic a,B-diolates the aromatic diolates ' s2-CgH4(0-)2, ',2-C6C14(O-)2 rapidly undergo redox reactions even at low temperatures. EINLEITUNG In Teil II [I] konnten wir 19 F-NMR-spektroskopisch und praparativ nachweisen, dal3 Iodpentafluorid mit trimethylsilylierten a,w-Alkandiolaten (CH3)3SiO(CH2)nOSi(CH3)3 (n = 2,3,4,5,6,12) zu Iod(V)-alkoholat-fluoriden unterschiedlicher Konstitution und Stabilitat in Abhangigkeit von der Ketten. lange n abreagiert. Mehrkernige verbriickte Verb
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- Author
- Hermann Josef Frohn; Wolfgang Pahlmann
- Publisher
- Elsevier Science; Elsevier ; Elsevier BV (ISSN 0022-1139)
- Published
- 1985
- Language
- DE
- Field
- Chemistry (Physical Sciences)