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methylene iodide
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Diiodomethane or methylene iodide, commonly abbreviated "MI", is an organoiodine compound. Diiodomethane is a very dense colorless liquid; however, it decomposes upon exposure to light liberating iodine, which colours samples brownish. It is slightly soluble in water, but soluble in organic solvents. It has a very high refractive index of 1.741, and a surface tension of 0.0508 N·m−1.
Chemical data
- Formula
- CH2I2
- Molecular weight
- 267.835 g/mol
- IUPAC name
- diiodomethane
- SMILES
- C(I)I
- InChIKey
- NZZFYRREKKOMAT-UHFFFAOYSA-N
- XLogP
- 2.3
- Polar surface area
- 0 Ų
- H-bond donors
- 0
- H-bond acceptors
- 0
- Formal charge
- 0
via PubChem
Wikidata facts
- Subclass of
- dihalomethane
- Has part
- hydrogen
- Mass
- 267.825
Show 11 more facts
- chemical formula
- CH₂I₂
- found in taxon
- Ascophyllum nodosum
- described by source
- Brockhaus and Efron Encyclopedic Dictionary
- canonical SMILES
- C(I)I
- Commons category
- Diiodomethane
- melting point
- 6.1
- discoverer or inventor
- Alexander Butlerov
- density
- 3.28
- ionization energy
- 9.46
- boiling point
- 182
- standard enthalpy of formation
- 68.50
via Wikidata · CC0
~2 min read
Encyclopedic overview
5 sectionsContents
- Uses
- Preparation
- Safety
- References
- External links
Diiodomethane or methylene iodide, commonly abbreviated "MI", is an organoiodine compound. Diiodomethane is a very dense colorless liquid; however, it decomposes upon exposure to light liberating iodine, which colours samples brownish. It is slightly soluble in water, but soluble in organic solvents. It has a very high refractive index of 1.741, and a surface tension of 0.0508 N·m−1.
==Uses== Because of its high density, diiodomethane is used in the determination of the density of mineral and other solid samples. It can also be used as an optical contact liquid, in conjunction with the gemmological refractometer, for determining the refractive index of certain gemstones.
Excerpted from Wikipedia’s “methylene iodide” article, available under the CC BY-SA 4.0 licence.