76842-07-4

Usage

Uses

2'',3,3'',4,5-Pentachlorobiphenyl is a polychlorinated biphenyl (PCB) congeners.

Upstream product

• 95-50-1 1,2-dichloro-benzene 
• 634-91-3 3,4,5-trichloroaniline 
• 2401-21-0 1,2-Dichloro-3-iodobenzene 
• 64634-61-3 1,2,3-trichloro-5-iodobenzene 

Relevant academic research and scientific papers

Physical, spectral and chromatographic properties of all 209 individual PCB congeners

Through the use of two capillary GC columns: 40% octadecyl/ 15% phenyl methyl siloxane and 50% phenyl methyl siloxane, it was possible to separate 201 PCB congeners with only four unresolved pairs. The data compiled in this study for all 209 congeners will aid in the identification of selected individual components of these environmental pollutants. The use of this data also presents the opportunity for the improved quantification of the commercial PCB formulations. -from Authors

Synthesis of 14C-Labelled and Unlabelled Coplanar Polychlorinated Biphenyls (PCBs)

A modified Ullman reaction is described for synthesis of the three most toxic coplanar PCBs, 3,3',4,4'-tetrachlorobiphenyl, 3,3',4,4',5-pentachlorobiphenyl and 3,3',4,4',5,5'-hexachlorobiphenyl. 3,3',4',5,5'-Pentachlorobiphenyl and one ortho-substituted PCB, 2,3,3',4,4'-pentachlorobiphenyl, were also prepared.Methods for the preparation of unlabelled 3,3',4,4',5-pentachlorobiphenyl and 3,3',4,4',5-pentachlorobiphenyl are presented.Three isomeric tetrachloro(nitro)biphenyls were isolated and characterized as intermediates in the synthesis of 3,3',4,4',5- and 2,3,3',4,4'-pentachlorobiphenyl via the Ponomarenko reaction.The Cadogan diaryl coupling method was also used for synthesis of 3,3',4,4',5-pentachlorobiphenyl.