N-Methylaniline-induced Si–Si bond cleavages of perchlorooligosilanes

• Si–Si bond cleavages of perchlorooligosilanes were studied.
• N,N-Methylphenylamino-substituted monosilanes were obtained with quantitative yields.
• Products and yields depended on the perchlorooligosilanes used.
• Disproportionation between Si–N and Si–Cl bonds was observed in products.

This study describes Si–Si bond cleavage of perchlorooligosilane using an amine. N-Methylaniline-induced Si–Si bond cleavage reactions of cyclic perchlorosilanes Si5Cl10 (1) and Si4Cl8 (2), and acyclic perchlorosilanes Si5Cl12 (3) and Si2Cl6 (4) yielded the N,N-methylphenylamino-substituted monosilanes, (NMePh)3−nSiHCln (5; n = 2, 6; n = 1, 7; n = 0) and (NMePh)4-nSiCln (8; n = 2, 9; n = 3). Products and yields depended on the perchlorooligosilanes used. In addition, disproportionation between Si–N and Si–Cl bonds was observed in reactions of compounds 5 and 9.

N-Methylaniline-induced Si–Si bond cleavages of decachlorocyclopentasilane yielded N,N-methylphenylamino-substituted monosilanes in quantitative yields. Si–N bonds and Si–H bonds were formed in the products and all Si–Si bonds of decachlorocyclopentasilane were cleaved.Figure optionsDownload as PowerPoint slide