Si(CH2CH2SnH3)4—a unique organotin hydride featuring 12 SnH units in a dendritic molecule. Single-crystal X-ray structures of tetrakis(2-stannylethylene)silane and tetrakis[2-(triphenylstannyl)ethylene]silane
摘要:
Fourfold hydrostannation of tetravinylsilane affords the first generation metallodendrimer Si(CH2CH2SnPh3)(4) (1). Selective bromination yields Si(CH2CH2SnBr3)(4) (2), which can be reduced by LiAlH4 to give Si(CH2CH2SnH3)(4) (3), containing 12 reactive Sn-H bonds. These novel dendritic organotin compounds were characterized by elemental analysis, spectroscopic studies (H-1-, C-13-, Sn-119-NMR; IR) and by single-crystal X-ray structure determination. The molecular structures of 1 and 3 reveal increased conformational constraint in 1; the average Sn-H bond length in 3 is 1.60(7) Angstrom. (C) 2000 Elsevier Science S.A. All rights reserved.
Si(CH2CH2SnH3)4—a unique organotin hydride featuring 12 SnH units in a dendritic molecule. Single-crystal X-ray structures of tetrakis(2-stannylethylene)silane and tetrakis[2-(triphenylstannyl)ethylene]silane
摘要:
Fourfold hydrostannation of tetravinylsilane affords the first generation metallodendrimer Si(CH2CH2SnPh3)(4) (1). Selective bromination yields Si(CH2CH2SnBr3)(4) (2), which can be reduced by LiAlH4 to give Si(CH2CH2SnH3)(4) (3), containing 12 reactive Sn-H bonds. These novel dendritic organotin compounds were characterized by elemental analysis, spectroscopic studies (H-1-, C-13-, Sn-119-NMR; IR) and by single-crystal X-ray structure determination. The molecular structures of 1 and 3 reveal increased conformational constraint in 1; the average Sn-H bond length in 3 is 1.60(7) Angstrom. (C) 2000 Elsevier Science S.A. All rights reserved.
Si(CH2CH2SnH3)4—a unique organotin hydride featuring 12 SnH units in a dendritic molecule. Single-crystal X-ray structures of tetrakis(2-stannylethylene)silane and tetrakis[2-(triphenylstannyl)ethylene]silane
作者:Herbert Schumann、Birgit C. Wassermann、Michaela Frackowiak、Bamidele Omotowa、Stefan Schutte、Janna Velder、Stefan H. Mühle、Werner Krause
DOI:10.1016/s0022-328x(00)00188-1
日期:2000.9
Fourfold hydrostannation of tetravinylsilane affords the first generation metallodendrimer Si(CH2CH2SnPh3)(4) (1). Selective bromination yields Si(CH2CH2SnBr3)(4) (2), which can be reduced by LiAlH4 to give Si(CH2CH2SnH3)(4) (3), containing 12 reactive Sn-H bonds. These novel dendritic organotin compounds were characterized by elemental analysis, spectroscopic studies (H-1-, C-13-, Sn-119-NMR; IR) and by single-crystal X-ray structure determination. The molecular structures of 1 and 3 reveal increased conformational constraint in 1; the average Sn-H bond length in 3 is 1.60(7) Angstrom. (C) 2000 Elsevier Science S.A. All rights reserved.