Chemistry:1,2-Diiodoethylene

1,2-Diiodoethylene

cis-1,2-Diiodoethene (Z) trans-1,2-Diiodoethene (E)
cis-1,2-Diiodoethene (Z) trans-1,2-Diiodoethene (E)
Names
Preferred IUPAC name 1,2-Diiodoethene
Other names 1,2-Diiodoethylene sym-Diiodoethylene
Identifiers
CAS Number	590-27-2 (Z) Y 20244-70-6 (E)
3D model (JSmol)	Interactive image Interactive image
ChemSpider	4576037 (Z) 4527007 (E)
EC Number	209-821-0
PubChem CID	11537 5463341 (Z) 5378102 (E)
InChI InChI=1S/C2H2I2/c3-1-2-4/h1-2H/b2-1+ Key: CVOGMKGEVNGRSK-OWOJBTEDSA-N
SMILES C(=CI)I C(=C/I)\I
Properties
Chemical formula	C2H2I2
Molar mass	279.847 g/mol
Melting point	73.4 °C (164.1 °F; 346.5 K)
Boiling point	196 to 197 °C (385 to 387 °F; 469 to 470 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
Infobox references

1,2-Diiodoethylene, also known as 1,2-diiodoethene, is an organoiodide with the molecular formula C₂H₂I₂. It can exist as either of two geometric isomers, cis-1,2-diiodoethylene or trans-1,2-diiodoethylene.

E-Z relative stability

Like most cis-trans compounds, the Z isomer (cis) is less stable than the E isomer (trans) by 2 kcal/mol.

See also

• 1,1-Diiodoethane
• 1,2-Diiodoethane