WebApr 5, 2024 · Naphthalene chlorination is an important formation mechanism of polychlorinated naphthalenes (PCNs) in combustion flue gas. In this study, a total of … WebMar 13, 2024 · ii) Chlorination of ethylbenzene gives 1-chloro-1-phenylethane as the major product. Expert's answer i) The most efficient stabilization of the intermediate carbocation produced by electrophilic attack on naphthalene comes from those resonance forms which retain one fully benzenoid ring.

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WebThe single largest use of naphthalene is the production of phthalic anhydride, which is an intermediate used to make plasticizers for polyvinyl chloride, and to make alkyd resin polymers used in paints and varnishes. Sulfonic acids and sulfonates [ edit] Many naphthalenesulfonic acids and sulfonates are useful. WebThe chlorination of naphthalene in the vapour phase has been studied between 220° and 500° under the catalytic influence of small quantities of iodine. At 250° the reaction product contained α- and β-chloronaphthalene in the ratio of 9:1; this ratio decreases rapidly as the reaction is carried out at a higher temperature. nbc news honolulu

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WebThe products from the reaction of naphthalene are very dependent on the structure of the N -chlorinated amine. The bulky N -chlorotrialkylammonium salts selectively chlorinate the 1-position, but in low yield, whereas the less hindered N -chloropiperidine gives good yields of 1- (1-piperidino)naphthalene. Polychlorinated naphthalene (PCN) are the products obtained upon treatment of naphthalene with chlorine. The generic chemical formula is C10H8−(m+n)Cl(m+n). Commercial PCNs are mixtures of up to 75 components and byproducts. The material is an oil or a waxy solid, depending on … See more PCNs started to be produced for high-volume uses around 1910 in both Europe and the United States. In Europe the largest volume products were called Nibren waxes, made in Germany by Bayer. Other European … See more After about 20 years of commercial production, health hazards began to be reported in workers exposed to PCNs: chloracne, severe skin rashes and liver disease that led to deaths of workers. A conference about the hazards was organized at See more • Eva Jakobsson, Lillemor Asplund: Polychlorinated Naphthalenes (PCNs), in The Handbook of Environmental Chemistry, Volume 3K, 2000, p. 97–126, ISBN 978-3-540-65838-2, doi:10.1007/3-540-48915-0_5 See more In 2013, the 9th meeting of the Persistent Organic Pollutants Review Committee, established under the Stockholm Convention on Persistent Organic Pollutants See more • 1-Chloronaphthalene • 2-Chloronaphthalene See more WebNaphthalene is a white solid that evaporates easily. Fuels such as petroleum and coal contain naphthalene. It is also called white tar, and tar camphor, and has been used in … nbc news healthcare reporter