Photolysis of triphenylmethyl and related cations in sulphuric acid
- 1 January 1973
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 2
- No. 2,p. 95-101
- https://doi.org/10.1039/p29730000095
Abstract
Photolysis of triphenylmethyl cation in 99% sulphuric acid in the absence of oxygen gives 9-phenylfluorenyl cation. When oxygen is present an additional product, 9-hydroxyfluoren-9-yl cation is formed. The effect of oxygen on the rate of reaction and on the distribution of products is described. As the sulphuric acid concentration is reduced to 88% the rate of reaction is increased. Futher reduction is accompanied by the appearance of a new product, 4-hydroxyphenyldiphenylmethyl cation, which at 78% sulphuric acid becomes predominant. The effect of introducing a methyl or chloro-substituent into one or all of the para-positions of Ph3C+ is described.Keywords
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