Reaktionen subvalenter Verbindungen des Siliciums mit alkylierten Aromaten

Article abstract of DOI:10.1016/0022-328X(94)87167-1

Subvalent compounds of silicon have been prepared from dichloro-bis(diethylamino)silane, dichloro-bis(2,6-dimethylpiperidino)silane and dichloro(diphenyl)silane with Na-K alloy in hexane or hexane-dimethoxyethane containing monomethylbenzenes, dimethylbenzenes, trimethylbenzenes, tetramethylbenzenes, pentamethylbenzenes and hexamethylbenzenes, 4-ethylmethylbenzene, diphenylmethane, bibenzyl, 9,10-dihydroanthracene, 1- and 2-methylnaphthalene and bis(diethylamino)(diphenylmethyl)silane.Reactions primarily take place on one of the CH3 groups or CH2 bridges by insertion of (R2N)2Si into a CH bond, thus giving monosilanes RSi(NR'2)2H.Secondary products include disilanes R2H and benzo-1,3-dihydro-1,2-disiloles.Products of the thermal reaction of Ph2CH-Si(NEt2)2H (XVI), and the reaction of XVI with Ph2Si are consistent with the formulation of the intermediates as silylenes.Most compounds are characterized by NMR (1H, 13C and 29Si) and mass spectra; some have been identified by high resolution mass spectroscopy and (or) characteristic signals in their NMR spectra.X-ray structure analyses are provided for (Ph2CH)2Si(NEt2)2 (XVII) and 2 (XXXI).