1,2-Diiodoethylene

1,2-Diiodoethylene

Skeletal formula of cis-1,2-difluoroethene cis-1,2-Diiodoethene (Z) Skeletal formula of trans-1,2-difluoroethene trans-1,2-Diiodoethene (E)
Skeletal formula of Cis-1,2-DIIODOETHYLENE cis-1,2-Diiodoethene (Z) Skeletal formula of Trans-1,2-DIIODOETHYLENE 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)
CompTox Dashboard (EPA)	DTXSID20871779
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. ^[1] 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.^{[ citation needed ]}

See also

• 1,1-Diiodoethane
• 1,2-Diiodoethane

References

1. PubChem. "1,2-Diiodoethene". pubchem.ncbi.nlm.nih.gov. Retrieved 2026-01-14.