Reactions of silylated silyl-, germyl-, and stannyl anions with group 6 halogenpentacarbonyl metalates gave the respective pentacarbonyl metalate derivatives. With the exception of a stannylated chromate all compounds were obtained in good yields and selectivity. An alternative approach employing group 6 metal hexacarbonyls in the reaction with the group 14 anions worked equally well. All compounds
Reactions of potassium oligosilanyls with ZnCl2 lead to the formation of oligosilanylzinc compounds with zinc's coordination sphere expanded by ligation of TMEDA, an additional oligosilanyl group, or a chloride ion.
A number of novel cyclo- and bicyclosilanes connected by linear silanylene chains have been prepared and characterized by X-ray crystallography and NMR spectroscopy. The UV absorption properties of all compounds were studied and found to show low-energy absorption maxima red-shifted compared to acyclic compounds with comparable chain lengths. Synthesis of the new polysilanes was accomplished using
Exploration of Novel α,ω‐Substituted Diphosphatrisilanes by Combining Experimental Methods and DFT Calculations
作者:Gernot P. Weinberger、Florian Sommer、Ana Torvisco、Roland C. Fischer、Michaela Flock
DOI:10.1002/ejic.202000581
日期:2020.10.22
The noveldiphosphatrisilanes (R2P‐Si(SiMe3)2‐)2‐SiMe2} [R = Ph, H] and the cyclophosphatrisilabutanes R–PSi3} [R = H, SiMe3] have been prepared via salt metathesis reactions between phosphanides and 2,4‐dihalogenated pentasilanes and characterized via NMR spectroscopy. The experimental results were supported by DFTcalculations. Although P–Si bond formation was observed in all cases, the outcome
A Stable Fused Bicyclic Disilene as a Model for Silicon Surface
作者:Hideki Kobayashi、Takeaki Iwamoto、Mitsuo Kira
DOI:10.1021/ja055718z
日期:2005.11.1
rings adopt the envelope conformation, and the Si=Si double bond in 1 exists in the slightly cis-bent form (bent angle theta is 3.6 degrees ) compared to that of the highly cis-bent dimer on the Si(001) surface. Highly symmetric 1H NMR spectral pattern of 1 remains even at -80 degrees C, indicating the facile ring flipping of the bicyclic skeleton in solution. While syn-adduct was obtained in the reaction