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Vol 488, No 2 (2019)
- Year: 2019
- Articles: 2
- URL: https://journals.rcsi.science/0012-5008/issue/view/9327
Chemistry
Polymers with Regular Alternation of 1,7-Bis[(dimethyl)silylmethylene]-m-carborane and Diorganosiloxane Units
Abstract
New highly thermally stable carboranylmethyl-containing diorganosiloxane polymers were obtained by polycondensation of equimolar amounts of 1.7-bis[hydroxy(dimethyl)silylmethylene]-m-carborane and bis(dimethylamino)diorganosilanes. It was shown that replacement of 24 to 33 mol % of dimethylsiloxane units in the polymer backbone by methyl(phenyl)siloxane or diphenylsiloxane units containing bulky phenyl groups results in the formation of only amorphous polymers. The polymers are readily soluble in organic solvents and have high thermal stability.
249-251
One-Pot Synthesis and Structure Study of a New Indoline Spiropyran with Cationic Substituent
Abstract
A one-pot synthesis and structure study of a new salt spiropyran of the indoline series containing 2H-chromene vinyl-3H-indolium moiety as a substituent at the 8'-position are described. The structure was confirmed by 1H and 13C NMR and IR spectroscopy and high-resolution mass spectrometry. The single crystals of the compound were investigated by X-ray diffraction analysis. The structure was compared with the previously known isostructural analog.
252-256