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Valence shell electron pair repulsion (VSEPR) theory (/ ˈ v ɛ s p ər, v ə ˈ s ɛ p ər / VESP-ər, [1]: 410 və-SEP-ər [2]) is a model used in chemistry to predict the geometry of individual molecules from the number of electron pairs surrounding their central atoms. [3]
Like other chlorosilanes or silanes, silicon tetrachloride reacts readily with water: . SiCl 4 + 2 H 2 O → SiO 2 + 4 HCl. The reaction can be noticed on exposure of the liquid to air, as SiCl 4 vapour produces fumes as it reacts with moisture to give a cloud-like aerosol of silica and hydrochloric acid. [6]
Structure and properties Index of refraction, n D: 1.41156 at 25 °C Abbe number? Dielectric constant, ε r: 2.248 ε 0 at 0 °C Bond strength: 381 kJ/mol (Si-Cl) Bond length? Bond angle: 109° (Cl-Si-Cl) Dipole#Molecular dipoles: 0 D Magnetic susceptibility: −87.5 Viscosity: 99.4 mPa.s at 25 °C 96.2 mPa.s at 50 °C Thermal conductivity
Nonlinear geometry is commonly observed for other triatomic molecules and ions containing only main group elements, prominent examples being nitrogen dioxide (NO 2), sulfur dichloride (SCl 2), and methylene (CH 2). This geometry is almost always consistent with VSEPR theory, which usually explains non-collinearity of atoms with a presence of ...
The top line remains unchanged in our updated bracketology, with Auburn, Duke, Alabama and Florida continuing to occupy the No. 1 seeds with less than four weeks left until Selection Sunday.
Structure of cisplatin, an example of a molecule with the square planar coordination geometry. In chemistry, the square planar molecular geometry describes the stereochemistry (spatial arrangement of atoms) that is adopted by certain chemical compounds. As the name suggests, molecules of this geometry have their atoms positioned at the corners.
Elon Musk’s Department of Government Efficiency has appealed to “competent” and “caring” people to join the cost-cutting team.. Applications to join the billionaire’s newly formed ...
The study, which was published in February in the journal Nature Microbiology, found that influenza A viral particles can actually adapt their shape to remain infectious and stick around longer ...