aromatic nucleus

aromatic nucleus

[¦ar·ə¦mad·ik ′nü·klē·əs]
(organic chemistry)
The six-carbon ring characteristic of benzene and related series, or condensed six-carbon rings of naphthalene, anthracene, and so forth.
References in periodicals archive ?
The as-prepared carbon microspheres (CMs) have a core-shell chemical structure consisting of a highly aromatic nucleus and a hydrophilic surface, which contains a variety of reactively hydrophilic oxygen chemical groups (carboxylic, carbonyl, ester, hydroxyl).
Chemists and materials scientists explore synthesizing aromatic compounds with aromatization reactions mediated by transition metals, as an alternative to the conventional route of substitution reactions of the aromatic nucleus. Much research into the approach has been reported over the past few years, but this is the first full volume devoted to it.
It was established that beyond half of the elemental carbon is included into aromatic nucleus. To compare the composition of TB obtained in open or closed systems, the one from Fischer retort contains less oxygen and its molecular mass is greater.
Visible adsorptions are qualitatively similar, and differences between these two objects can be seen only in quantitative characters of hydrogen substituents in aromatic nucleus. IRS confirm the presence of benzene nucleus at 1600 and 1500-1515 [cm.sup.-1].
6,184,417 B1: Bayer AG, Leverkusen, Germany, has patented a method for preparing acetophenones with a fiuoralkyl-substituted aromatic nucleus.
Bands in the region of 1500-1600 cm-1 were due to C=C stretching of aromatic nucleus (benzene ring).
Decrease in the peak intensities of C-O stretching vibration of aryl ether near 1250 cm-1 and C=C stretching of aromatic nucleus in the region of 1500-1600 cm-1.