Stability and aromaticity of the cyclopenta-fused pyrene congeners.

Aromaticity of pyrene and its cyclopentafused congeners; resonance and NICS criteria. An ab initio Valence Bond analysis in terms of Kekulé resonance

Thermal generation and (inter)conversion of (multi) cyclopenta-fused polycyclic aromatic hydrocarbons

FVT of I , 1 -dichloroand/or 1 -chloroethenyl substituted PAHs gives access to the CP-PAH's pyracylene (l), cyclopenta[cd]pyrene (12) and benz[ghi]fluoranthene (13), cyclopent[hi]aceanthrylene (18) and cyclopent[hi]acephenanthrylene (19), and the novel cyclopenta[cd]fluoranthene (22) and isomeric cyclopent[fg](25a), cyclopent[ik](25b) and cyclopent[rnn]acepyrylene (25c), respectively. The prope...

Local aromaticity of the five-membered rings in acenaphthylene derivatives.

In this paper, a detailed study of the local aromaticity in a series of cyclopenta-fused linear polyacenes (acenaphthylene derivatives) was performed using several different criteria of aromaticity. Namely, the energy effect (ef), bond resonance energy (BRE), harmonic oscillator model of aromaticity (HOMA) index, multi centre delocalization indices (MCI), electron density at ring critical point...

Bacterial and human cell mutagenicity study of some C18H10 cyclopenta-fused polycyclic aromatic hydrocarbons associated with fossil fuels combustion.

A number of isomeric C18H10 polycyclic aromatic hydrocarbons (PAHs), thought to be primarily cyclopenta-fused PAHs, are produced during the combustion and pyrolysis of fossil fuels. To determine the importance of their contributions to the total mutagenic activity of combustion and pyrolysis samples in which they are found, we characterized reference quantities of four C18H10 CP-PAHs: benzo[ghi...

Mutagenesis and morphological transformation of mammalian cells by a non-bay-region polycyclic cyclopenta(cd)pyrene and its 3,4-oxide.

Cyclopenta(cd)pyrene, a constituent of environmental emissions, has been found to mutate and transform mammalian cells in culture. Cyclopenta(cd)pyrene 3,4-oxide, a presumed metabolite, was found to be a direct-acting mutagen and to transform mammalian cells. These results suggest that cyclopenta(cd)pyrene 3,4-oxide may be an ultimate mutagenic form of the parent hydrocarbon.