Tridecamethyl-1-phospha- and tridecamethyl-1-arsa-2,3,4,5,6,7,8-heptasilabicyclo[2.2.2]octane
摘要:
The octaheterobicyclo[2.2.2]octanes MeSi(SiMe2SiMe2)(3)E(E=P, As) have been prepared in high yields (up to 50%) from the alkali metal phosphide or arsenide Na3E/K3E and the heptasilane MeSi(SiMe2SiMe2Cl)(3)[GRAPHICS]The cages were isolated by crystallization from heptane and the crystal structure of the arsenic compound was determined. The synthesis of the heptasilane MeSi(SiMe2SiMe2Cl)(3) is described too. All compounds were characterized by multinuclear NMR spectroscopy (H-1, Si-29, C-13, P-31) as well as elemental analysis.
Tridecamethyl-1-phospha- and tridecamethyl-1-arsa-2,3,4,5,6,7,8-heptasilabicyclo[2.2.2]octane
摘要:
The octaheterobicyclo[2.2.2]octanes MeSi(SiMe2SiMe2)(3)E(E=P, As) have been prepared in high yields (up to 50%) from the alkali metal phosphide or arsenide Na3E/K3E and the heptasilane MeSi(SiMe2SiMe2Cl)(3)[GRAPHICS]The cages were isolated by crystallization from heptane and the crystal structure of the arsenic compound was determined. The synthesis of the heptasilane MeSi(SiMe2SiMe2Cl)(3) is described too. All compounds were characterized by multinuclear NMR spectroscopy (H-1, Si-29, C-13, P-31) as well as elemental analysis.
The excited-state dynamics of polysilanedendrimers are studied using time-resolved emission spectroscopy. The time-resolved emission spectra of polysilanedendrimers showed two bands, one in the UV and one in the visible region. The former was assigned to the emission from the excited state at the linear Si-Si chain, and the latter was assigned to that at the branching points. The intramolecular energy
Tridecamethyl-1-phospha- and tridecamethyl-1-arsa-2,3,4,5,6,7,8-heptasilabicyclo[2.2.2]octane
作者:Karl Hassler、Gerlinde M. Kollegger、Harald Siegl、Gerd Klintschar
DOI:10.1016/s0022-328x(96)06822-2
日期:1997.4
The octaheterobicyclo[2.2.2]octanes MeSi(SiMe2SiMe2)(3)E(E=P, As) have been prepared in high yields (up to 50%) from the alkali metal phosphide or arsenide Na3E/K3E and the heptasilane MeSi(SiMe2SiMe2Cl)(3)[GRAPHICS]The cages were isolated by crystallization from heptane and the crystal structure of the arsenic compound was determined. The synthesis of the heptasilane MeSi(SiMe2SiMe2Cl)(3) is described too. All compounds were characterized by multinuclear NMR spectroscopy (H-1, Si-29, C-13, P-31) as well as elemental analysis.