879-05-0Relevant articles and documents
Respes et al.
, p. 191 (1969)
PHOTO LEWIS ACID GENERATOR
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Paragraph 0104-0107; 0137-0139, (2020/03/09)
Provided is a compound capable of generating a Lewis acid in response to light unlike conventional photo acid generators. The compound comprises an anionic moiety having a central boron atom and a particular cationic moiety (for example, a cation having a HOMO-LUMO gap of 5.3 eV or less). The cationic moiety may, for example, have a skeleton selected from an N-substituted pyridinium skeleton, an N-substituted bipyridinium skeleton, an N-substituted quinolinium skeleton, and a pyrylium skeleton.
Preparation of heptafluoronaphthyllithiums and -magnesiums: An unexpected difference in the reactivity of isomers C10F7H and C10F7Br towards organolithium and organomagnesium compounds
Shmakov, Mikhail M.,Bardin, Vadim V.,Prikhod'ko, Sergey A.,Adonin, Nicolay Yu
supporting information, (2019/08/20)
Significant differences in the reactivity of isomeric heptafluoronaphthalenes and bromoheptafluoronaphthalenes towards organolithium and organomagnesium compounds were found. Metalation of polyfluorinated naphthalenes 2-C10F7X (X = H, Br) occurs easily under the action of bases (BuLi, t-BuLi, LDA) as well as EtMgBr (X = Br) in ether. This fact was proven by 19F NMR spectroscopy and by trapping of 2-C10F7M (M = Li, MgBr, Mg(2-C10F7)) with electrophile ClSiMe3. The interaction of 1-C10F7Br with BuLi or EtMgBr proceeds in a similar way. In contrast to 2-C10F7H, isomeric 1-C10F7H is the less acidic substrate and undergoes only the nucleophilic alkyldefluorination when combined with BuLi or t-BuLi.
Bi- and tridentate silicon-based acceptor molecules
Horstmann, Jan,Lamm, Jan-Hendrik,Strothmann, Till,Neumann, Beate,Stammler, Hans-Georg,Mitzel, Norbert W.
, p. 383 - 391 (2017/06/30)
Triethynylphenylsilane (1), trivinylphenylsilane (2), diethynyldiphenylsilane (3) and diphenyldivinylsilane (4) were reacted with chlorodimethylsilane yielding the corresponding hydrosilylation products. To increase their Lewis acidity, the Si-Cl functions were directly transferred into Si-C6F5 units by salt elimination reactions leading to the (semi-) flexible molecules 5-8 bearing two or three Lewis-acidic sidearms. With the aim of providing host-guest complexes, the air-stable and readily soluble compounds 5-8 were converted with N- and O-Lewis bases of different size and geometry. In all cases, NMR spectroscopic investigations reveal no formation of Lewis acid-base complexes. X-ray diffraction experiments of host compounds 5-7 show intermolecular aryl perfluoroaryl interactions of dispersion nature in the solid state. By hydrosilylation of 1 with trichlorosilane the more Lewisacidic all-trans-tris[(trichlorosilyl)vinyl]phenylsilane (9) was obtained. Its Lewis acidity was further increased by fluorination to yield all-trans-tris[(trifluorosilyl)vinyl] phenylsilane (10); the conversion with nitrogen containing Lewis bases ends up in the formation of insoluble precipitates.