Ethyl iodide

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Ethyl iodide
IUPAC name

Iodoethane[1]

Identifiers
CAS number 75-03-6 YesY
PubChem 6340
ChemSpider 6100 YesY
EC number 200-833-1
ChEMBL CHEMBL1232588 N
RTECS number KI4750000
Beilstein Reference 505934
Jmol-3D images Image 1
Properties
Molecular formula C2H5I
Molar mass 155.97 g mol−1
Appearance Colourless liquid
Density 1.940 g mL−1
Melting point −111.10 °C; −167.98 °F; 162.05 K
Boiling point 71.5 to 73.3 °C; 160.6 to 163.8 °F; 344.6 to 346.4 K
Solubility in water 4 g L−1 (at 20 °C)
Solubility in ethanol Miscible
Solubility in diethyl ether Miscible
log P 2.119
Vapor pressure 17.7 kPa
kH 1.8 μmol Pa−1 kg−1
Refractive index (nD) 1.513–1.514
Viscosity 5.925 mPa s (at 20 °C)
Thermochemistry
Std enthalpy of
formation ΔfHo298		 −39.9–−38.3 kJ mol−1
Std enthalpy of
combustion ΔcHo298		 −1.4629–−1.4621 MJ mol−1
Specific heat capacity, C 109.7 J K−1 mol−1
Hazards
GHS pictograms
GHS signal word DANGER
GHS hazard statements H302, H315, H317, H319, H334, H335
GHS precautionary statements P261, P280, P305+351+338, P342+311
EU classification Xn
R-phrases R20, R36/37/38, R42/43
S-phrases S23, S26, S36/37, S45
NFPA 704
1
2
1
Flash point 72 °C; 162 °F; 345 K
LD50 330 g m−3 (oral, rat)
Related compounds
Related alkanes
Related compounds
 N (verify) (what is: YesY/N?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

Ethyl iodide (also iodoethane) is a colorless, flammable chemical compound. It has the chemical formula C2H5I and is prepared by heating ethanol with iodine and phosphorus.[2] On contact with air, especially on the effect of light, it decomposes and turns yellow or reddish from dissolved iodine. It may also be prepared by reaction between hydroiodic acid and ethanol distilling off the ethyl iodide. Ethyl iodide should be stored in copper powder to avoid fast decomposition, though even with this method samples doesn't last more than 1 year.

Ethyl iodide distillation. It has a greenish color due to decomposition.

Because iodide is a good leaving group, ethyl iodide is an excellent alkylating agent. It is also used as the hydrogen radical promoter.

References

  1. ↑ "iodoethane - Compound Summary". PubChem Compound. USA: National Center for Biotechnology Information. 26 March 2005. Identification and Related Records. Retrieved 29 February 2012. 
  2. ↑ Merck Index of Chemicals and Drugs, 9th ed., monograph 3753


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