Journal of the Chemical Society - Faraday Transactions p. 681 - 688 (1992)
Update date:2022-08-04
Topics:
Pal, Haridas,
Palit, Dipak K.
Mukherjee, Tulsi
Mittal, Jai P.
The spectroscopic characteristics and the kinetic parameters associated with the transients formed on one-electron oxidation of quinizarin (1,4-dihydroxy-9,10-anthraquinone), quinizarin 2- and 6-sulfonates, 1,5-dihydroxy-9,10-anthraquinone and 1,8-dihydroxy-9,10-anthraquinone have been studied by pulse radiolysis and kinetic spectrophotometric techniques, using OH., O.-, N3., Br2.- and .CH2CHO as the oxidising radicals.The pKa and the disproportionation equilibria of the semi-oxidised quinones have been studied for the water-soluble sulfonates.In contrast to the complex decay of the semi- oxidised naphthazarin (5,8-dihydroxy-1,4-naphthoquinone), the semi-oxidised anthraquinone derivatives decay by simple second-order kinetics.The pKa values of the latter are also much higher (ca. 8) compared to the former (ca. <4).The differences observed are attributed to the loss in symmetry in the free radical structures of the semi-oxidised anthraquinone derivatives.
View MoreNingxia Soochow Agrochemical Limited Company
Contact:(+86）0512 6320 8190
Address:wujiang
Hangzhou Eastbiopharm Co.,Ltd.
Contact:+86-571-88931780
Address:Hangzhou,China
Xinjiang Zhongtai Chemical Co., Ltd.
Contact:+86-991-8788172
Address:NO.78 XISHAN RD.URUMQI，CHINA
qingdao goldenchem imp and exp co.,ltd.
Contact:532-55579246
Address:no.62 ,haier road laoshan distirct
Zhejiang kehong chemical co., ltd
Contact:0086-575-85522000
Address:xiner center RD binhai industrial zone shaoxing zhejiang province P.R.China,312073
Doi:10.1002/oms.1210220104
(1987)Doi:10.1246/bcsj.44.185
(1971)Doi:10.1016/S0040-4039(00)90149-7
(1965)Doi:10.1055/s-1995-4064
(1995)Doi:10.1002/hlca.200490005
(2004)Doi:10.1021/ja001996g
(2000)
