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Dichloromethane (DCM, methylene chloride, or methylene bichloride) is an organochlorine compound with the formula C H 2 Cl 2. This colorless, volatile liquid with a chloroform -like, sweet odor is widely used as a solvent .
log 10 of Dichloromethane vapor pressure. Uses formula: ... Index of refraction: 1.424 Dielectric constant: 8.93 Viscosity: 0.44 cP at 20 °C
Refraction at interface. Many materials have a well-characterized refractive index, but these indices often depend strongly upon the frequency of light, causing optical dispersion. Standard refractive index measurements are taken at the "yellow doublet" sodium D line, with a wavelength (λ) of 589 nanometers.
Index of refraction, [1] n D: 1.4448 Abbe number? Dielectric constant, [2] ε r: 10.5 ε 0 at 20 °C Bond strength? Bond length? Bond angle? Magnetic susceptibility? Surface tension [3] 40.05 mN/m at 10 °C 38.75 mN/m at 20 °C 28.4 mN/m at 100 °C Viscosity [4] 1.1322 mPa·s at 0 °C 0.8385 mPa·s at 20 °C 0.6523 mPa·s at 40 °C
Refraction of light at the interface between two media of different refractive indices, with n 2 > n 1.Since the phase velocity is lower in the second medium (v 2 < v 1), the angle of refraction θ 2 is less than the angle of incidence θ 1; that is, the ray in the higher-index medium is closer to the normal.
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Diiodomethane can be prepared from the widely available solvent dichloromethane by the action of sodium iodide in acetone in the Finkelstein reaction: [6] CH 2 Cl 2 + 2 NaI → CH 2 I 2 + 2 NaCl. It can also be prepared by reducing iodoform with elemental phosphorus [7] or sodium arsenite: [6] CHI 3 + Na 3 AsO 3 + NaOH → CH 2 I 2 + NaI + Na 3 ...
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