- Permethylheteroatomcyclopolysilane mit Heteroatomen der VI. Hauptgruppe. Darstellung und spektroskopische Eigenschaften
-
Group VI permethylheterocyclopolysilanes (SiMe2)n X with n = 4,5,6 and X = O, S, Se have been synthesized from α,ω-dichloropolysilanes and Li2S/Li2Se or by simple hydrolysis.From UV spectroscopic results considerable contributions of the heteroatom lone pair electrons to low-energy electron transitions can be derived.Si-Si NMR coupling constants satisfactorily correlate with heteroatom electronegativities, indicating dominant Fermi contact contributions to the magnitude of the corresponding coupling constants.
- Stueger, Harald,Eibl, Markus,Hengge, Edwin,Kovacs, Ilona
-
-
Read Online
- DARSTELLUNG VON 2,3,4,5-TETRAKIS(DIMETHYL)SULFOCYCLOPENTASILAN UND 2,3,4,5-TETRAKIS(DIMETHYL)SELENACYCLOPENTASILAN
-
Octamethylcyclotetrasilan reacts with elemental sulfur or selenium in benzene at 80 deg C to give the five-membered ring products, cyclo-(Me2Si)4S and cyclo-(Me2Si)4Se.
- Hengge, Edwin,Schuster, Hans Georg
-
-
Read Online
- GROUP VI HETEROATOMCYCLOPOLYSILANES SYNTHESES AND NMR PROPERTIES
-
Group VI heterocyclopolysilanes have been synthesized from α,ω-dichloropolysilanes and Li2S/Li2Se or by simple hydrolysis.Si-Si NMR coupling constants correlate satisfactorily with electronegativities of the heteroelements indicating dominant Fermi contact contributions.
- Stueger, H.,Eibl, M.,Kovacs, I.
-
-