- Preparation and 13C NMR Spectroscopic Study of Disubstituted Adamantane-1,3-dimethyldiyl Dications
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A series of substituted adamantane-1,3-dimethyldiyl dications 5 has been prepared by the ionization of α,α,α',α'-tetrasubstituted-1,3-adamantanedimethyl diols 6 in superacidic media.The dications were stable with groups such as phenyl and methyl, however, unstable with cyclopropyl groups.The 13C NMR spectroscopic study of the obtained dications clearly indicates that the positive charges are more delocalized into the substituents due to the close proximity of the cationic centers through the adamantyl cage.These studies are informative in probing cage compounds with multiply-charged centers.
- Heagy, Michael D.,Wang, Qi,Olah, George A.,Prakash, G. K. Surya
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- Adamantane derivatives and resin compositions using the same as raw material
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The adamantane derivatives of the present invention which are represented by the general formula (1): wherein X is a hydrogen atom, alkyl, halogen-containing alkyl, halogen, or hydroxyl-, halogen-, nitrile- or ether-containing hydrocarbyl, and a plurality of X groups, if any, may be the same or different from each other; n1 is an integer of 1 to 14; R1 to R4 may be the same or different from each other and are independently alkyl or halogen-containing alkyl; and Y1 and Y2 may be the same or different from each other and are independently a hydrogen atom or a group represented by the general formula (2): wherein R5 to R7 may be the same or different from each other and are independently a hydrogen atom, alkyl, halogen or halogen-containing alkyl, are excellent in optical properties, heat resistance and acid-dissociating property, and useful as crosslinking-type resins, optical materials such as optical fibers, light wave guides, optical disk substrates and photoresists as well as raw materials thereof, intermediate products of medicines or agricultural chemicals, and various other industrial products.
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Page/Page column 16-17; 19-20
(2008/06/13)
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