Polychlorinated carbazoles

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File:Polychlorinated carbazoles structure.svg

Polychlorinated carbazoles (PCCZ) are a group of chlorinated organic compounds. They are derivatives of carbazole and nitrogen analogues of polychlorinated dibenzofurans.

Polychlorinated carbazoles usually occur as a mixture of various isomers. This mixture can have a certain frequency pattern (congener pattern) from which conclusions can be drawn about the causes of formation.

PCCZs are not manufactured purposefully. They are formed under certain conditions as by-products of thermal processes. In environmental samples, mixed halogenated carbazoles are also found.M. Pena-Abaurrea, K. J. Jobst, R. Ruffolo, L. Shen, R. McCrindle, P. A. Helm, E. J. Reiner: Identification of Potential Novel Bioaccumulative and Persistent Chemicals in Sediments from Ontario (Canada) Using Scripting Approaches with GC×GC-TOF MS Analysis. Environ. Sci. Technol., 2014, 48(16), 9591–9599, {{doi|10.1021/es5018152}}.J. Guo, D. Chen, D. Potter, K. J. Rockne, N. C. Sturchio, J. P. Giesy, A. Li: Polyhalogenated Carbazoles in Sediments of Lake Michigan: A New Discovery. Environ. Sci. Technol., 2014, 48(21), 12807–12815, {{doi|10.1021/es503936u}}.

class="wikitable floatright" |+ congeners ! Chlorine atoms !! PCCZ isomers
1	{{0|00}}4
2	{{0}}16
3	{{0}}28
4	{{0}}38
5	{{0}}28
6	{{0}}16
7	{{0|00}}4
8	{{0|00}}1
Total	135