Stannasiloxanes with acyclic, bicyclic, and cubic core structures: X-ray crystal structure of the bicyclic compound [RSi(OSnPh2O)3SiR] (R = (2,6-Me2C6H3)NSiMe3)

Voigt, Andreas ; Murugavel, Ramaswamy ; Roesky, Herbert W. (1996) Stannasiloxanes with acyclic, bicyclic, and cubic core structures: X-ray crystal structure of the bicyclic compound [RSi(OSnPh2O)3SiR] (R = (2,6-Me2C6H3)NSiMe3) Organometallics, 15 (24). pp. 5097-5101. ISSN 0276-7333

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Official URL: http://pubs.acs.org/doi/abs/10.1021/om960522g

Related URL: http://dx.doi.org/10.1021/om960522g

Abstract

The reactions of the (arylamino)silanetriols with mono-, di-, and trifunctional alkyl/aryl tin(IV) chlorides have been investigated. Treatment of (arylamino)silanetriols RSi(OH)3 (1, 2) with Me3SnCl leads to the isolation of the acyclic stannasiloxanes RSi(OSnMe3)3 (R = (2,6-Me2C6H3)NSiMe3 (3), (2,6-i-Pr2C6H3)NSiMe3 (4)), which are potential precursors for the preparation of metallasiloxanes. The reactions between the silanetriols 1 and 2 and R'2SnCl2 in a 2:3 molar ratio yield the bicylic stannasiloxanes [RSi(OSnR'2O)3SiR] (R = (2,6-Me2C6H3)NSiMe3, R' = Me (5); R = (2,6-Me2C6H3)NSiMe3, R' = Ph (6); R = (2,6-i-Pr2C6H3)NSiMe3, R' = Me (7); R = (2,6-i-Pr2C6H3)NSiMe3, R' = Ph (8)). The cubic stannasiloxanes [RSiO3SnPh]4 (R = (2,6-Me2C6H3)NSiMe3 (9); (2,6-i-Pr2C6H3)NSiMe3 (10)) are easily prepared in good yields by starting from the respective silanetriols and PhSnCl3. In all the reactions NEt3 is used as the hydrogen chloride acceptor. The new stannasiloxanes 3-10 have been extensively characterized by means of their analytical data and mass, IR, and NMR (1H, 29Si and 119Sn) spectral data. The solid-state structure of the bicyclic compound 6 has been determined by X-ray diffraction studies.

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