biphenylene

CAS No. 259-79-0

Formula: C12H8
Basic Info

Biphenylene is an alternant, polycyclic hydrocarbon composed of two benzene rings joined together by a pair of mutual attachments (as opposed to a normal ring fusion), thus forming a 6-4-6 arene system. The resulting planar structure was one of the first pi-electronic hydrocarbon systems discovered to show evidence of antiaromaticity.
The biphenylene structure can also be understood as a dimer of the reactive intermediate benzyne, which in fact serves as a major synthetic route, e.g., from benzenediazonium-2-carboxylate.

Formula
C12H8
Molecular Weight
152.192
Exact Mass
152.063
LogP
3.334
PSA
0
Synonyms

diphenylene

Biphenylene

bisbenzocyclobutene

Cyclobutadibenzene

Dibenzocyclobutadiene

1,1'-Biphenylene

expand collapse

Properties
Density
1.19g/cm3
Boiling Point
262.4ºC at 760mmHg
Melting Point
113-114ºC(lit.)
Flash Point
99.6ºC
Refractive Index
1.799
Vapor Pressure
0.0178mmHg at 25°C
Safety Info
Safety Statements
61-29-24/25
Risk Statements
R51/53
HS Code
2902909090
Hazard Codes
Spectrum
NMR Spectrum 1H NMR : parameter in CDCl3
expand collapse
ESR Spectrum ESR : ANION RADICAL, REDUCTION WITH K IN DME
expand collapse

Related Compound Information

PRODUCTS
Coming Soon
SUPPLIERS
Coming Soon
BRANDING
Coming Soon