14799-66-7Relevant articles and documents
Syntheses, Solid State Structures and Photochemistry of α,ω-Bis-[(1,8-dichloroanthracen-10-yl)dimethylsilyl]alkanes
Niermeier, Philipp,Lamm, Jan-Hendrik,Linnemannst?ns, Marvin,Neumann, Beate,Stammler, Hans-Georg,Mitzel, Norbert W.
, p. 3041 - 3047 (2018)
Starting from 10-bromo-1,8-dichloroanthracene, a series of 1,8-dichlorinated anthracene derivatives, flexibly bridged in position 10 by -Me 2 Si- and -Me 2 Si-(CH 2) n -SiMe 2 - linker units, were synthesised. The linked anthracenes were generated by converting (1,8-dichloroanthracen-10-yl)lithium with chlorosilanes in salt-elimination reactions. The bichromophors were tested in UV light induced photo reactions. None of the new compounds yielded any intra- or intermolecular photoproduct. All α,ω-(dimethylsilyl)alkane-linked bisanthracenes decomposed to give 1,8-dichloro-9-hydroxyanthracen-10(9 H)-one in the presence of oxygen. A completely different behaviour was shown by the bisanthracenyldimethylsilane, undergoing a 9,10:3′,4′-photocyclomerisation reaction. The new compounds were characterised by NMR spectroscopy, mass spectrometry and in most cases by X-ray diffraction studies.
Silicon-containing heterocyclic compounds I. Preparation and reactions of 1,1,2,2,-tetramethyl-1,2-disilacycloalkanes, from disilacyclopentane to disilacyclooctane
Kumada, Makoto,Tamao, Kohei,Takubo, Tadashi,Ishikawa, Mitsuo
, p. 43 - 55 (1967)
Four 1,2-disilacycloalkanes of the formula Me2SiSiMe2-(CH2)n, where n equals 3, 4, 5 and 6, have been prepared by two methods: one involves reaction of ClMe2SiSiMe2Cl with BrMg(CH2)nMgBr, the other comprises sodium/potassium condensation of ClMe2Si(CH2)nSiMe2Cl. It has been found that both the disilacyclopentane and -hexane exclusively undergo cleavage of the silicon-silicon bond when treated with concentrated sulfuric acid, whereas the disilacycloheptane gives several products in which the silicon-silicon bond has not been cleaved. The disilacyclopentane undergoes cleavage of the silicon-silicon bond when heated with 0.6 N sodium ethoxide in ethanol at 90°, while the disilacyclohexane is quite stable under the same conditions.