In the crystal structure of the title compound, C23H19N5O3·0.58C2H6OS·0.42C2H3N, prepared by the azo coupling of the 4-nitro-phenyl-diazo-nium salt with 3a-(p-tol-yl)-2,3,3a,4-tetra-hydro-1H-benzo[d]pyrrolo-[1,2-a]imidazol-1-one, the azo mol-ecules are linked by N-H⋯O hydrogen bonds into chains along the a-axis direction, and by the π-π inter-action into [101] chains. The dimethyl sulfoxide and...

We report laser spectroscopic and computational studies of host/guest hydration interactions between functional molecules (hosts) and water (guest) in supersonic jets. The examined hosts include dibenzo-18-crown-6-ether (DB18C6), benzo-18-crown-6-ether (B18C6) and calix[4]arene (C4A). The gaseous complexes between the functional molecular hosts and water are generated under jet-cooled condition...

SUMMARY Benzo(a)pyrene and five isomenic phenols of benzo (a)pynene were tested for carcinogenicity by the topical application of 0.4 @moIe of each compound to the backs of C57BL/6J mice once every 2 weeks for 60 weeks. 1-, 3-, and 12-hydroxybenzo(a)pyrene were noncarcinogenic , 11-hy droxybenzo(a)pyrene was weakly carcinogenic, and 2-hy droxybenzo(a)pyrene and benzo(a)pyrene were highly car ci...

Polycyclic aromatic hydrocarbons (PAHs) and dioxins are lipophilic organic pollutants occurring widely in the terrestrial environment. In order to study the PAHs and 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) transfer in the food chain, pigs have been fed with milk mixed either with 14C-phenanthrene, with 14C-benzo[a]pyrene or with 14C-TCDD. The analysis of portal and arterial blood radioactivi...

In the title compound, [Co(C(13)H(8)F(2)O)(C(3)H(9)P)(3)], the cobalt(0) atom is coordinated by three trimethyl-phosphine ligands and a π-coordinated carbonyl group of the 2,6-difluoro-benzo-phenone ligand in a distorted tetra-hedral geometry. The Co-O and Co-C distances are 1.896 (2) and 2.049 (4) Å, respectively.

The mononuclear Pd(ii) complex cis-[PdCl(2)([9]aneS(3))]([9]aneS(3)= 1,4,7-trithiacyclononane) converts at 44 kbar pressure into an intensely coloured chain polymer, which exhibits distorted octahedral co-ordination at the metal centre and an unprecedented [1233] conformation for the thioether crown.

Annelation of the coumarin ring was performed via cathodic reduction of 3-nitrocoumarin derivatives (1-4) by controlled potential. The reduction of 3-nitro-4-aminocoumarin, 1, gave 3,4-diaminocoumaDin, 5, and subsequent treatment with formic acid furnished tlie novel 4H [1] benzopyrano [3,4-b] imidazole-4-on ring system 6. The condensation of 5 with trifluoracetic acid anhydride, acetic acid an...