104 °. The geometry is similar to that shown by the phosphorins (phosphabenzenes) 〈68AG(E)811〉. With two O, S or NR groups and two CC double bonds in a ring, the systems are not aromatic, and there is no reason to expect them to be planar. In fact, the simple systems are...
Noun1.benzene ring- a closed chain of 6 carbon atoms with hydrogen atoms attached benzene formula,benzene nucleus,Kekule formula benzene,benzine,benzol- a colorless liquid hydrocarbon; highly inflammable; carcinogenic; the simplest of the aromatic compounds ...
Safina, L, Selivanova, G, Bagryanskaya, I, Shteingarts, V (2009) Reaction of quinolines fluorinated at the benzene ring with nitrogen-centered nucleophiles. Russ Chem Bull Int Ed 58: pp. 1049-1061SAFINA L Y,SELIVANOVA G A,YU I B,et al.Reaction of quinolines fluorinated at the ...
S-9 fraction. The hydroxyl radicalsreact with benzene to form phenols and dihydroxyphenols,which are excreted rapidly inurine. About one-third of the retained benzeneis excreted as phenols in the urine. Theremaining two-thirds may be further degradedand attached onto the tissue or oxidized and...
According to a careful analysis of kinetic isotope effects associated with aromatic oxidation, kH/kD ~ 1.2 is compatible with reversible opening of the epoxide ring (73). When labeled H218O2 (> 90% isotopic enrichment) was used as the oxidant in the presence of 16O2 and H216O, the Ph18...
ring. Examples includepyridine(C5H5N), in which onenitrogen(N) replaces one CH group, andpurine(C5H4N4), in which two nitrogens replace two CH groups. Heterocyclic aromatic compounds, such asfuran(C4H4O),thiophene(C4H4S), andpyrrole(C4H4NH), contain five-membered rings in which oxygen (O...
Three derivatives of E,E-1,4-bis[2-(2,3,4,5,6-pentafluorophenyl)ethenyl]benzene, two of which bear nitrogen atoms in the ethenyl spacers, while in a third the central benzene ring is replaced by a pyrazine moiety, have been synthesized. The supramolecular structures of the resulting set...
benzene ring is present and marked in the spectra.S, dynamic structure factor;Q, momentum transfer;ω, energy transfer.e, The {1H}–13C cross-polarization MAS solid-state NMR spectra of MIL-125 (black, bottom), MIL-125-defect (red, middle) and MIL-125-Zn (blue, top), and benzene-...
Benzene is a widely used commodity chemical, which is currently produced from fossil resources. Lignin, a waste from lignocellulosic biomass industry, is the most abundant renewable source of benzene ring in nature. Efficient production of benzene from l
Table 4. Anti-VZV activity of BCNAs containing a p-alkyl-substituted phenyl group as the side-chain of the furanyl ring Sign in to download hi-res image CompoundREC50 (μM) (VZV)aCC50 (μM)a OKAYS Cf1837 H 0.28 0.16 >200 Cf1835 Methyl 0.06 0.06 >200 Cf1836 Ethyl 0.09 0....