benzene ring


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benzene ring

benzene ring

n.
A hexagonal ring arrangement found in benzene and other aromatic compounds, consisting of six carbon atoms with alternating single and double bonds between them, and with each carbon atom bonded to a hydrogen atom, or to other atoms or groups of atoms in derivatives of benzene.

benzene ring

n
(Elements & Compounds) the hexagonal ring of bonded carbon atoms in the benzene molecule or its derivatives. Also called: benzene nucleus See also Kekulé formula

ben′zene ring`


n.
the graphic representation of the structure of benzene as a hexagon with a carbon atom at each of its points, each carbon atom united with an atom of hydrogen.
[1875–80]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.benzene ring - a closed chain of 6 carbon atoms with hydrogen atoms attached
benzene, benzine, benzol - a colorless liquid hydrocarbon; highly inflammable; carcinogenic; the simplest of the aromatic compounds
References in periodicals archive ?
The splitting pattern of the signals in aromatic region of the1H-NMR spectrum of 3 witnessed p-substituted [I' 7.60(2H, d, J = 9.2 Hz), 6.85 (2H, d, J = 8.8 Hz)] and 1,2-4-trisubstituted benzene ring [I' 6.54 (1H, dd, J = 8.4, 2.0 Hz), 6.48 (1H, d, J = 8.4 Hz), 6.42 (1H, d, J = 2.0 Hz) systems in its structure, which were fully supported by the13C NMR spectrum of 3 (Table-1).
Summary: Organic scintillators are aromatic hydrocarbon compounds which contain benzene ring structures interlinked in various ways
DVB was emulsified in the water easily and its benzene ring had a conjugated effect with the benzene ring of PS core which enhanced the compatibility between them, so DVB was a kind of excellent swelling agent for PS@PUB composite microspheres (Fig.
The stability of the benzene ring and its tendency to take part in substitution reactions rather than addition reactions being one.
The IR (KBr disk) spectrum showed broad vibration at 3375 [cm.sup.-1] attributed to hydroxyl moiety (OH), sharp absorption at 1600 [cm.sup.-1] attributed to aromatic benzene ring, strong absorption band at 2275 [cm.sup.-1] due to C-H stretching of saturated moiety, and absorption band at 1255 [cm.sup.-1] due to C-O stretching.
Because of the symmetry of the benzene ring and the rotation of the benzene ring around the C-X bond could be considered as free rotation, so the flexibility of polyimide only depends on the length of rigid chain and the valence angle of the C-X-C bond [31].
As stated earlier, the substituted benzene ring at the end of the polypyridyl ligand has a large effect in determining the electronic and luminescence properties of the complex due to the lowest unoccupied molecular orbital (LUMO) location being centred on the polypyridyl ligand.
According to [sup.1]H NMR data, there exist four double-bond H signals including [[delta].sub.H] 7.46 (1H, d, J = 8.0), [[delta].sub.H] 7.33 (1H, d, J = 8.0), [[delta].sub.H] 7.08 (1H, t, J = 8.0), and [[delta].sub.H] 6.98 (1H, t, J = 8.0) in the low field, indicating the presence of ortho-disubstituted benzene ring structure.
In the structure of compounds 5a, 5d, 5e, 5g, and 5j, the metasubstitution on the benzene ring 2 (Figure 2(b)) was modified to determine the contribution of this substitution to the antiproliferative activity.
The three additives were as follows: a C11 aromatic hydrocarbon called 4-tert-butyltoluene (TBT), NMA (a polar substance with a benzene ring and amino group), and 2-Methyl-1,5-pentanediamine (also referred to as 2-methylpentamethylenediamine or C6 diamine, and abbreviated as MPD), which has no benzene ring and two polar amino groups.
These factors include steric repulsion between the N[O.sub.2] groups, the formation of conjugated ions attracting the H atoms located at adjacent positions on the benzene ring, the resistance of the conjugated [pi] orbitals to the rotation of the N[O.sub.2] groups, and the stress on the C-N bond caused by the repulsion of the N[O.sub.2] groups.
Naphthalene has two benzene ring sharing two carbon atoms in the ortho position.