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| the process or result of a chemical reaction to oxygen, or the deposit that forms on the surface of a metal as it oxidizes |
| a vessel, commonly a glass bulb with a long neck bent downward, used for distilling or decomposing substances by heat |
| benzene ring | |
| —n | |
| See also Kekulé formula Also called: benzene nucleus the hexagonal ring of bonded carbon atoms in the benzene molecule or its derivatives | |
benzene ring n.
The hexagonal ring structure in the benzene molecule and its substitutional derivatives, each vertex of which is occupied and distinguished by a carbon atom.
benzene ring
(click for larger image in new window) A hexagonal arrangement of six carbon atoms, each atom bonded to its adjacent atoms by a single covalent bond, and by an unusual ring bond of electrons shared by all six carbon atoms. The benzene ring is a basic component of many organic compounds, especially the aromatic hydrocarbons. In benzene itself, each carbon atom is also bonded to a hydrogen atom; in derivatives of benzene, one or more of the hydrogen atoms is replaced by other atoms or groups of atoms. |