Results of the study into photodegradation of 2,4,6-trichlorophenol and pentachlorophenol in aqueous solutions have been presented. Quantum yields and rate constants of the reactions were determined. Intermediate products were identified by GC/MS method. The experiments confirmed formation of polychlorinated dibenzo-p-dioxins and dibenzofurans in photochemical reactions. The findings showed tha...

The 1,4-bis(3-guaiazulenylmethylium)benzene and 1,4-bis[1-(4,6,8-trimethylazulenylmethylium)]benzene dication salts were synthesized via an acid-catalyzed condensation/dehydration protocol with guaiazulene-terephthalaldehyde (2 : 1 ratio), and 4,6,8-trimethylazulene-terephthalaldehyde (2 : 1 ratio) respectively in one-pot processes. A similar condensation reaction with the parent azulene led to...

Starting from 2,2'-dihydroxybiphenyl and an allenic ester, the title dibenzo-condensed dioxepine derivative was synthesized using a one-pot procedure.

INTRODUCTION Dibenzo(a,h)anthnacene and the three metabolically pos sible trans-dihydrodiols of dibenzo(a,h)anthracene were tested for tumorigenic activity on mouse skin and in new born mice. in the tumorigenicity study on mouse skin, a single topical application of 10 to 160 nmol of compound was followed 7 days later by twice-weekly applications of the tumor promoter 12-O-tetradecanoylphorbol-...

1 VIZARD, C.G, RIMMER, D.L, PLESS-MULLOLI, T, SINGLETON, I, & AIR, V.S. 2 Identifying contemporary and historic sources of soil polychlorinated dibenzo-p-dioxins 3 and polychlorinated dibenzofurans in an industrial urban setting. Science of the Total 4 Environment 2006, 370(1), 61-69. doi:10.1016/j.scitotenv.2006.06.006 5 6 Identifying contemporary and historic sources of soil 7 polychlorinated...

The laser-induced fluorescence spectra of jet-cooled benzo-18-crown-6 (B18C6) and dibenzo-18-crown-6 (DB18C6) exhibit a number of vibronic bands in the 35 000-37 000 cm(-1) region. We attribute these bands to monomers and hydrated clusters by fluorescence-detected IR-UV and UV-UV double resonance spectroscopy. We found four and two conformers for bare B18C6 and DB18C6, and the hydration of one ...