Acetylene Dibromide
Structural Formula Vector Image
Title: Acetylene Dibromide
CAS Registry Number: 540-49-8
CAS Name: 1,2-Dibromoethene
Additional Names: 1,2-dibromoethylene; sym-dibromoethylene
Molecular Formula: C2H2Br2
Molecular Weight: 185.85
Percent Composition: C 12.93%, H 1.08%, Br 85.99%
Line Formula: BrCH=CHBr
Literature References: Prepd by reaction of tetrabromoethylene with Zn and alc followed by sepn of cis- and trans-forms by fractional distillation: Noyes et al., J. Am. Chem. Soc. 72, 33 (1950).
Properties: Liquid, gradually decomposed by air, moisture, or light. d417 2.21. nD20 1.5428. Practically insol in water. Sol in many organic solvents.
Index of refraction: nD20 1.5428
Density: d417 2.21
Derivative Type: cis-Form
Properties: nD25 1.5370.
Index of refraction: nD25 1.5370
Derivative Type: trans-Form
Properties: nD25 1.5440.
Index of refraction: nD25 1.5440
CAUTION: Narcotic in high concns.

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