Synthesis and characterization of new silicon-centred tin-dendrimers Si[CH2CH2SnR3]4. Single-crystal X-ray structure of the tetrahydrofuran adduct of tetrakis[2-(tribromostannyl)ethyl]silane |
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| Authors: | Herbert Schumann,Yilmaz Aksu,Stefan Schutte,Birgit C. Wassermann,Stefan H. Mü hle |
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| Affiliation: | Institut für Chemie, Technische Universität Berlin, Straße des 17, Juni 135, D-10623 Berlin, Germany |
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| Abstract: | A series of novel first-generation silicon-centred tin dendrimers Si(CH2CH2SnR3)4 [R = CH3 (3), iBu (4), C CCH3 (5), C6H4CH3-4 (6), C6H4OCH3-4 (7), (CH2)4OCH2CH2OCH3 (8), CH2SiMe3 (9)] was prepared by the reaction of Si(CH2CH2SnBr3)4 (2) with the appropriate Grignard reagent or LiCH2SiMe3 in tetrahydrofuran. The new compounds were characterized by multinuclear NMR studies (1H, 13C, 119Sn), mass spectrometry (MALDI-TOF, EI) and elemental analyses. The molecular structure of Si[CH2CH2SnBr3(THF)2]2[CH2-CH2SnBr3(THF)]2 (2a) was determined by single-crystal X-ray diffraction. |
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| Keywords: | Organotin compounds Organosilicon compounds Dendrimers NMR MALDI-TOF X-ray structure |
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