polar gaseous impurities such as CO2, H2S and SO2 is passed through a column packed with a modified molecular sieve having hydrophobic property by surface fluorination with a fluorine-contg. gas. The gaseous impurities in the gaseous SiF4 are adsorbed on the molecular sieve and removed. Thus, ...
Davy in 1800 thought silica to be a compound and not an element; later in 1811, Gay Lussac and Thenard probably prepared impure amorphous silicon by heating potassium with silicon tetrafluoride. Berzelius, generally credited with the discovery, in 1824 succeeded in preparing amorphous silicon by th...
Silicon tetrafluoride, SiF_4, is a colorless gas formed when hydrofluoric acid attacks silica (SiO_2) or glass. Describe the bonding in the SiF_4 molecule, using valence bond theory. Are the bonds in the compound BrF3 polar covalent, no...
Silicon and silicon carbide readily react with all four stable halogens, forming the colourless, reactive, and volatile silicon tetrahalides.[70] Silicon tetrafluoride also may be made by fluorinating the other silicon halides, and is produced by the attack of hydrofluoric acid on glass.[71] He...
He was also the first to obtain elemental silicon in 1825 from silicon tetrafluoride by reduction of the latter with metallic potassium. The new element was named silicium (from the Latin silex,“flint”). The Russian name kremnii was introduced in 1834 by G. I. Gess (G. H. Hess). ...
Davy in 1800 thought silica to be a compound and not an element; later in 1811, Gay Lussac and Thenard probably prepared impure amorphous silicon by heating potassium with silicon tetrafluoride. Berzelius, generally credited with the discovery, in 1824 succeeded in preparing amorphous silicon by th...
As compared to silane and silicon tetrachloride, an anomalous error in the absolute energy is reported for the L2,3-spectrum of silicon tetrafluoride, amounting to an additional spectral shift of 1 eV. This anomaly is also observed ... T Fransson,D Burdakova,P Norman - 《Physical Chemistry ...
Interactive 3D chemistry animations of reaction mechanisms and 3D models of chemical structures for students studying University courses and advanced school chemistry hosted by University of Liverpool
Interactive 3D chemistry animations of reaction mechanisms and 3D models of chemical structures for students studying University courses and advanced school chemistry hosted by University of Liverpool
High- Resolution Fourier-Transform IR Spectroscopic Determination of Impurities in Silicon Tetrafluoride and Silane Prepared from it. J. Inorg. Mater. 2006, 42, 924-931.High-resolution Fourier-transform IR spectroscopic determination of impurities in silicon tetrafluoride and silane prepared from it[J]...