Oxygen-containing compounds in polydimethylsilanes and -carbosilanes

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An analysis of fractions extracted from polydimethylsilanes, as well as distillates obtained during the synthesis of poly(oligo)carbosilanes was carried out. By the methods of gel permeation chromatography and chromatography-mass spectrometry, the range of molecular weights in extracts and distillates, the composition and structure of compounds, as well as the sequence of their retention times on the chromatographic column were determined. It was established that the compounds extracted from polydimethylsilanes are low molecular weight cycles containing methylsilane and/or methylsiloxane units. In distillates, compared with extracts, the number of low molecular weight compounds containing individual or mixed methylsilane, carbosilane and siloxane units increases.

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А. Filippov

State Research Institute of Chemistry and Technology of Organoelement Compounds

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Email: amphil@yandex.ru
俄罗斯联邦, Moscow, 105118

A. Gorodetskaya

State Research Institute of Chemistry and Technology of Organoelement Compounds

Email: amphil@yandex.ru
俄罗斯联邦, Moscow, 105118

V. Prokhortseva

State Research Institute of Chemistry and Technology of Organoelement Compounds

Email: amphil@yandex.ru
俄罗斯联邦, Moscow, 105118

D. Zhigalov

State Research Institute of Chemistry and Technology of Organoelement Compounds

Email: amphil@yandex.ru
俄罗斯联邦, Moscow, 105118

D. Zhuk

State Research Institute of Chemistry and Technology of Organoelement Compounds

Email: amphil@yandex.ru
俄罗斯联邦, Moscow, 105118

P. Storozhenko

State Research Institute of Chemistry and Technology of Organoelement Compounds

Email: amphil@yandex.ru
俄罗斯联邦, Moscow, 105118

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2. Fig. 1. Mass chromatograms of samples From 1 (a) and From g2 (b).

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3. Fig. 2. Mass spectra of samples From 1 (a) and From g2 (b).

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4. Scheme 1.

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5. Scheme 2.

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6. Scheme 3.

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7. Scheme 4.

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8. Scheme 5.

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9. Scheme 6. m/z = 115 – 1,3-dimethyl-1,3-disilacyclobutyl cation; m/z = 116 – 1,3-dimethyl-1,3-disilacyclobutane molecular cation; 59 – MeSi radical(=O)• or •CH2=SiOH; 60 is a neutral fragment of MeNSi=O or CH2=Si(H)OH; 104 –.

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10. Scheme 6.

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11. Scheme 8.

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