| 释义 |
benzene ring
 benzene ringbenzene ringn. 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] Thesaurus| Noun | 1. | benzene ring - a closed chain of 6 carbon atoms with hydrogen atoms attachedbenzene formula, benzene nucleus, Kekule formulabenzene, benzine, benzol - a colorless liquid hydrocarbon; highly inflammable; carcinogenic; the simplest of the aromatic compounds |
benzene ring
benzene ring[′ben‚zēn ‚riŋ] (organic chemistry) The six-carbon ring structure found in benzene, C6H6, and in organic compounds formed from benzene by replacement of one or more hydrogen atoms by other chemical atoms or radicals. benzene ring
ring [ring] 1. any annular or circular organ, structure, or area.2. in chemistry, a collection of atoms united in a continuous or closed chain.abdominal ring, external an opening in the aponeurosis of the external oblique muscle for the spermatic cord or round ligament.abdominal ring, internal an aperture in the transverse fascia for the spermatic cord or round ligament.Albl's ring a ring-shaped shadow in radiographs of the skull, caused by aneurysm of a cerebral artery.Bandl's ring see bandl's ring.benzene ring the hexagon representing the arrangement of carbon atoms in a molecule of benzene, different compounds being derived by replacement of the hydrogen atoms by different elements or compounds.Cannon's ring a focal contraction seen radiographically at the mid-third of the transverse colon, marking an area of overlap between the superior and inferior nerve plexuses.conjunctival ring a ring at the junction of the conjunctiva and cornea.constriction ring a contracted area of the uterus, where the resistance of the uterine contents is slight, as over a depression in the contour of the fetus, or below the presenting part.fibrous ring of heart anulus fibrosus.halo ring a metal orthosis used for traction in the treatment of spinal cord injuries. The halo apparatus can maintain stability and alignment of the cervical vertebrae while the patient is out of bed.inguinal ring, deep an aperture in the transverse fascia for the spermatic cord or the round ligament.inguinal ring, external superficial inguinal ring.inguinal ring, internal deep inguinal ring.inguinal ring, superficial an opening in the aponeurosis of the external oblique muscle for the spermatic cord or the round ligament.Kayser-Fleischer ring a golden brown or green discoloration in the zone of Descemet's membrane in the limbic region of the cornea seen in wilson's disease and other liver disorders.pathologic retraction ring a complication of prolonged labor marked by failure of relaxation of the circular fibers at the internal opening of the cervix, obstructing delivery of the infant. See also bandl's ring.physiologic retraction ring the demarcation between the upper, contracting portion of the uterus in labor and the lower, dilating part.Schwalbe's ring a circular ridge composed of collagenous fibers surrounding the outer margin of Descemet's membrane.tympanic ring the bony ring forming part of the temporal bone at birth and developing into the tympanic plate.umbilical ring the orifice in the abdominal wall of the fetus for transmission of the umbilical vein and arteries.vascular ring a congenital anomaly of the aortic arch and its tributaries, the vessels forming a ring about the trachea and esophagus and causing varying degrees of compression.ben·zene ringthe closed-chain arrangement of the carbon and hydrogen atoms in the benzene molecule.
See also: cyclic compound. benzene ringn. 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 A closed aromatic structure composed of 6 carbon atoms linked with alternating single- and double-hydrogen bonds—2 atoms in the orbital and 1 atom in the π orbital.ben·zene ring (ben'zēn ring) The closed-chain arrangement of the carbon and hydrogen atoms in the benzene molecule.
See also: cyclic compoundFinancialSeeringbenzene ring
Synonyms for benzene ringnoun a closed chain of 6 carbon atoms with hydrogen atoms attachedSynonyms- benzene formula
- benzene nucleus
- Kekule formula
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